Compiler warnings when building on Windows with clang + cmake

[pmqs]

Not sure if this is intended to be a supported combination, but a Windows build using clang & cmake spits out plenty of Compiler warnings

D:\Linux\develop\zlib>cmake -B build -S . -DCMAKE_C_COMPILER="clang" -G Ninja
-- The C compiler identification is Clang 16.0.5 with GNU-like command-line
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio/2022/BuildTools/VC/Tools/Llvm/bin/clang.exe - skipped
-- Detecting C compile features
-- Detecting C compile features - done
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of off64_t
-- Check size of off64_t - failed
-- Looking for fseeko
-- Looking for fseeko - not found
-- Looking for unistd.h
-- Looking for unistd.h - not found
-- Configuring done (3.7s)
-- Generating done (0.1s)
-- Build files have been written to: D:/Linux/develop/zlib/build

D:\Linux\develop\zlib>cmake --build build
[1/37] Building C object CMakeFiles/zlib.dir/compress.c.obj
[2/37] Building C object CMakeFiles/zlib.dir/adler32.c.obj
[3/37] Building C object CMakeFiles/zlib.dir/crc32.c.obj
[4/37] Building C object CMakeFiles/zlib.dir/gzread.c.obj
D:/Linux/develop/zlib/gzread.c:22:15: warning: 'read' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _read. See online help for details. [-Wdeprecated-declarations]
        ret = read(state->fd, buf + *have, get);
              ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:524:9: note: 'read' has been explicitly marked deprecated here
        _CRT_NONSTDC_DEPRECATE(_read)
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzread.c:28:34: warning: 'strerror' is deprecated: This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
        gz_error(state, Z_ERRNO, zstrerror());
                                 ^
D:/Linux/develop/zlib/gzguts.h:127:25: note: expanded from macro 'zstrerror'
#    define zstrerror() strerror(errno)
                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:177:16: note: 'strerror' has been explicitly marked deprecated here
_Check_return_ _CRT_INSECURE_DEPRECATE(strerror_s)
               ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzread.c:599:11: warning: 'close' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _close. See online help for details. [-Wdeprecated-declarations]
    ret = close(state->fd);
          ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:460:28: note: 'close' has been explicitly marked deprecated here
        _Check_return_opt_ _CRT_NONSTDC_DEPRECATE(_close)
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
3 warnings generated.
[5/37] Building C object CMakeFiles/zlib.dir/gzclose.c.obj
[6/37] Building C object CMakeFiles/zlib.dir/gzwrite.c.obj
D:/Linux/develop/zlib/gzwrite.c:78:20: warning: 'write' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _write. See online help for details. [-Wdeprecated-declarations]
            writ = write(state->fd, strm->next_in, put);
                   ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:559:24: note: 'write' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_write)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:80:42: warning: 'strerror' is deprecated: This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
                gz_error(state, Z_ERRNO, zstrerror());
                                         ^
D:/Linux/develop/zlib/gzguts.h:127:25: note: expanded from macro 'zstrerror'
#    define zstrerror() strerror(errno)
                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:177:16: note: 'strerror' has been explicitly marked deprecated here
_Check_return_ _CRT_INSECURE_DEPRECATE(strerror_s)
               ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:108:24: warning: 'write' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _write. See online help for details. [-Wdeprecated-declarations]
                writ = write(state->fd, state->x.next, put);
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:559:24: note: 'write' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_write)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:110:46: warning: 'strerror' is deprecated: This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
                    gz_error(state, Z_ERRNO, zstrerror());
                                             ^
D:/Linux/develop/zlib/gzguts.h:127:25: note: expanded from macro 'zstrerror'
#    define zstrerror() strerror(errno)
                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:177:16: note: 'strerror' has been explicitly marked deprecated here
_Check_return_ _CRT_INSECURE_DEPRECATE(strerror_s)
               ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:627:9: warning: 'close' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _close. See online help for details. [-Wdeprecated-declarations]
    if (close(state->fd) == -1)
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:460:28: note: 'close' has been explicitly marked deprecated here
        _Check_return_opt_ _CRT_NONSTDC_DEPRECATE(_close)
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
5 warnings generated.
[7/37] Building C object CMakeFiles/zlib.dir/deflate.c.obj
[8/37] Building C object CMakeFiles/zlib.dir/inflate.c.obj
[9/37] Building C object CMakeFiles/zlib.dir/infback.c.obj
[10/37] Building C object CMakeFiles/zlib.dir/inftrees.c.obj
[11/37] Building C object CMakeFiles/zlib.dir/inffast.c.obj
[12/37] Building C object CMakeFiles/zlib.dir/uncompr.c.obj
[13/37] Building C object CMakeFiles/zlib.dir/gzlib.c.obj
D:/Linux/develop/zlib/gzlib.c:183:15: warning: 'wcstombs' is deprecated: This function or variable may be unsafe. Consider using wcstombs_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
        len = wcstombs(NULL, path, 0);
              ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdlib.h:1012:1: note: 'wcstombs' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:891:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE'
    __DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX(_DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1962:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec size_t __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1, _TType2 _TArg2);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzlib.c:198:13: warning: 'wcstombs' is deprecated: This function or variable may be unsafe. Consider using wcstombs_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
            wcstombs(state->path, path, len + 1);
            ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdlib.h:1012:1: note: 'wcstombs' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:891:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE'
    __DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX(_DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1962:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec size_t __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1, _TType2 _TArg2);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzlib.c:233:20: warning: '_wopen' is deprecated: This function or variable may be unsafe. Consider using _wsopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
        fd == -2 ? _wopen(path, oflag, 0666) :
                   ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_wio.h:253:20: note: '_wopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(_wsopen_s)
                   ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzlib.c:235:9: warning: 'open' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _open. See online help for details. [-Wdeprecated-declarations]
        open((const char *)path, oflag, 0666));
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:517:24: note: 'open' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_open) _CRT_INSECURE_DEPRECATE(_sopen_s)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
4 warnings generated.
[14/37] Building RC object CMakeFiles/zlib.dir/win32/zlib1.rc.res
Microsoft (R) Windows (R) Resource Compiler Version 10.0.10011.16384
Copyright (C) Microsoft Corporation.  All rights reserved.

[15/37] Building C object CMakeFiles/zlib.dir/trees.c.obj
[16/37] Building C object CMakeFiles/zlibstatic.dir/compress.c.obj
[17/37] Building C object CMakeFiles/zlibstatic.dir/adler32.c.obj
[18/37] Building C object CMakeFiles/zlib.dir/zutil.c.obj
[19/37] Building C object CMakeFiles/zlibstatic.dir/crc32.c.obj
[20/37] Building C object CMakeFiles/zlibstatic.dir/gzclose.c.obj
[21/37] Building C object CMakeFiles/zlibstatic.dir/deflate.c.obj
[22/37] Building C object CMakeFiles/zlibstatic.dir/gzread.c.obj
D:/Linux/develop/zlib/gzread.c:22:15: warning: 'read' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _read. See online help for details. [-Wdeprecated-declarations]
        ret = read(state->fd, buf + *have, get);
              ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:524:9: note: 'read' has been explicitly marked deprecated here
        _CRT_NONSTDC_DEPRECATE(_read)
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzread.c:28:34: warning: 'strerror' is deprecated: This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
        gz_error(state, Z_ERRNO, zstrerror());
                                 ^
D:/Linux/develop/zlib/gzguts.h:127:25: note: expanded from macro 'zstrerror'
#    define zstrerror() strerror(errno)
                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:177:16: note: 'strerror' has been explicitly marked deprecated here
_Check_return_ _CRT_INSECURE_DEPRECATE(strerror_s)
               ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzread.c:599:11: warning: 'close' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _close. See online help for details. [-Wdeprecated-declarations]
    ret = close(state->fd);
          ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:460:28: note: 'close' has been explicitly marked deprecated here
        _Check_return_opt_ _CRT_NONSTDC_DEPRECATE(_close)
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
3 warnings generated.
[23/37] Building C object CMakeFiles/zlibstatic.dir/infback.c.obj
[24/37] Building C object CMakeFiles/zlibstatic.dir/inftrees.c.obj
[25/37] Building C object CMakeFiles/zlibstatic.dir/inflate.c.obj
[26/37] Building C object CMakeFiles/zlibstatic.dir/gzwrite.c.obj
D:/Linux/develop/zlib/gzwrite.c:78:20: warning: 'write' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _write. See online help for details. [-Wdeprecated-declarations]
            writ = write(state->fd, strm->next_in, put);
                   ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:559:24: note: 'write' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_write)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:80:42: warning: 'strerror' is deprecated: This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
                gz_error(state, Z_ERRNO, zstrerror());
                                         ^
D:/Linux/develop/zlib/gzguts.h:127:25: note: expanded from macro 'zstrerror'
#    define zstrerror() strerror(errno)
                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:177:16: note: 'strerror' has been explicitly marked deprecated here
_Check_return_ _CRT_INSECURE_DEPRECATE(strerror_s)
               ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:108:24: warning: 'write' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _write. See online help for details. [-Wdeprecated-declarations]
                writ = write(state->fd, state->x.next, put);
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:559:24: note: 'write' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_write)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:110:46: warning: 'strerror' is deprecated: This function or variable may be unsafe. Consider using strerror_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
                    gz_error(state, Z_ERRNO, zstrerror());
                                             ^
D:/Linux/develop/zlib/gzguts.h:127:25: note: expanded from macro 'zstrerror'
#    define zstrerror() strerror(errno)
                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:177:16: note: 'strerror' has been explicitly marked deprecated here
_Check_return_ _CRT_INSECURE_DEPRECATE(strerror_s)
               ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzwrite.c:627:9: warning: 'close' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _close. See online help for details. [-Wdeprecated-declarations]
    if (close(state->fd) == -1)
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:460:28: note: 'close' has been explicitly marked deprecated here
        _Check_return_opt_ _CRT_NONSTDC_DEPRECATE(_close)
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
5 warnings generated.
[27/37] Building C object CMakeFiles/zlibstatic.dir/gzlib.c.obj
D:/Linux/develop/zlib/gzlib.c:183:15: warning: 'wcstombs' is deprecated: This function or variable may be unsafe. Consider using wcstombs_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
        len = wcstombs(NULL, path, 0);
              ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdlib.h:1012:1: note: 'wcstombs' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:891:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE'
    __DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX(_DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1962:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec size_t __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1, _TType2 _TArg2);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzlib.c:198:13: warning: 'wcstombs' is deprecated: This function or variable may be unsafe. Consider using wcstombs_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
            wcstombs(state->path, path, len + 1);
            ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdlib.h:1012:1: note: 'wcstombs' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:891:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE'
    __DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX(_DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1, _TType2, _TArg2)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1962:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_NFUNC_0_2_SIZE_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec size_t __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1, _TType2 _TArg2);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzlib.c:233:20: warning: '_wopen' is deprecated: This function or variable may be unsafe. Consider using _wsopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
        fd == -2 ? _wopen(path, oflag, 0666) :
                   ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_wio.h:253:20: note: '_wopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(_wsopen_s)
                   ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/gzlib.c:235:9: warning: 'open' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _open. See online help for details. [-Wdeprecated-declarations]
        open((const char *)path, oflag, 0666));
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:517:24: note: 'open' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_open) _CRT_INSECURE_DEPRECATE(_sopen_s)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
4 warnings generated.
[28/37] Building C object CMakeFiles/zlibstatic.dir/inffast.c.obj
[29/37] Building C object CMakeFiles/zlibstatic.dir/uncompr.c.obj
[30/37] Building C object CMakeFiles/zlibstatic.dir/trees.c.obj
[31/37] Building C object CMakeFiles/zlibstatic.dir/zutil.c.obj
[32/37] Building C object CMakeFiles/example.dir/test/example.c.obj
D:/Linux/develop/zlib/test/example.c:70:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:117:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:208:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:300:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:374:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:449:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
6 warnings generated.
[33/37] Building C object CMakeFiles/minigzip.dir/test/minigzip.c.obj
D:/Linux/develop/zlib/test/minigzip.c:427:10: warning: 'fopen' is deprecated: This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    in = fopen(file, "rb");
         ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:212:20: note: 'fopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(fopen_s)
                   ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:439:5: warning: 'unlink' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _unlink. See online help for details. [-Wdeprecated-declarations]
    unlink(file);
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:554:9: note: 'unlink' has been explicitly marked deprecated here
        _CRT_NONSTDC_DEPRECATE(_unlink)
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:474:11: warning: 'fopen' is deprecated: This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    out = fopen(outfile, "wb");
          ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:212:20: note: 'fopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(fopen_s)
                   ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:482:5: warning: 'unlink' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _unlink. See online help for details. [-Wdeprecated-declarations]
    unlink(infile);
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:554:9: note: 'unlink' has been explicitly marked deprecated here
        _CRT_NONSTDC_DEPRECATE(_unlink)
        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:537:9: warning: 'setmode' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _setmode. See online help for details. [-Wdeprecated-declarations]
        SET_BINARY_MODE(stdin);
        ^
D:/Linux/develop/zlib/test/minigzip.c:42:33: note: expanded from macro 'SET_BINARY_MODE'
#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
                                ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:531:24: note: 'setmode' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_setmode)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:537:9: warning: 'fileno' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fileno. See online help for details. [-Wdeprecated-declarations]
        SET_BINARY_MODE(stdin);
        ^
D:/Linux/develop/zlib/test/minigzip.c:42:41: note: expanded from macro 'SET_BINARY_MODE'
#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
                                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:2433:28: note: 'fileno' has been explicitly marked deprecated here
        _Check_return_     _CRT_NONSTDC_DEPRECATE(_fileno)    _ACRTIMP int   __cdecl fileno(_In_ FILE* _Stream);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:538:9: warning: 'setmode' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _setmode. See online help for details. [-Wdeprecated-declarations]
        SET_BINARY_MODE(stdout);
        ^
D:/Linux/develop/zlib/test/minigzip.c:42:33: note: expanded from macro 'SET_BINARY_MODE'
#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
                                ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:531:24: note: 'setmode' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_setmode)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:538:9: warning: 'fileno' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fileno. See online help for details. [-Wdeprecated-declarations]
        SET_BINARY_MODE(stdout);
        ^
D:/Linux/develop/zlib/test/minigzip.c:42:41: note: expanded from macro 'SET_BINARY_MODE'
#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
                                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:2433:28: note: 'fileno' has been explicitly marked deprecated here
        _Check_return_     _CRT_NONSTDC_DEPRECATE(_fileno)    _ACRTIMP int   __cdecl fileno(_In_ FILE* _Stream);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:540:28: warning: 'fileno' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fileno. See online help for details. [-Wdeprecated-declarations]
            file = gzdopen(fileno(stdin), "rb");
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:2433:28: note: 'fileno' has been explicitly marked deprecated here
        _Check_return_     _CRT_NONSTDC_DEPRECATE(_fileno)    _ACRTIMP int   __cdecl fileno(_In_ FILE* _Stream);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:544:28: warning: 'fileno' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fileno. See online help for details. [-Wdeprecated-declarations]
            file = gzdopen(fileno(stdout), outmode);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:2433:28: note: 'fileno' has been explicitly marked deprecated here
        _Check_return_     _CRT_NONSTDC_DEPRECATE(_fileno)    _ACRTIMP int   __cdecl fileno(_In_ FILE* _Stream);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:550:13: warning: 'setmode' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _setmode. See online help for details. [-Wdeprecated-declarations]
            SET_BINARY_MODE(stdout);
            ^
D:/Linux/develop/zlib/test/minigzip.c:42:33: note: expanded from macro 'SET_BINARY_MODE'
#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
                                ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt_io.h:531:24: note: 'setmode' has been explicitly marked deprecated here
        _Check_return_ _CRT_NONSTDC_DEPRECATE(_setmode)
                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:550:13: warning: 'fileno' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fileno. See online help for details. [-Wdeprecated-declarations]
            SET_BINARY_MODE(stdout);
            ^
D:/Linux/develop/zlib/test/minigzip.c:42:41: note: expanded from macro 'SET_BINARY_MODE'
#  define SET_BINARY_MODE(file) setmode(fileno(file), O_BINARY)
                                        ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:2433:28: note: 'fileno' has been explicitly marked deprecated here
        _Check_return_     _CRT_NONSTDC_DEPRECATE(_fileno)    _ACRTIMP int   __cdecl fileno(_In_ FILE* _Stream);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:565:33: warning: 'fopen' is deprecated: This function or variable may be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
                    FILE * in = fopen(*argv, "rb");
                                ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:212:20: note: 'fopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(fopen_s)
                   ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:570:40: warning: 'fileno' is deprecated: The POSIX name for this item is deprecated. Instead, use the ISO C and C++ conformant name: _fileno. See online help for details. [-Wdeprecated-declarations]
                        file = gzdopen(fileno(stdout), outmode);
                                       ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:2433:28: note: 'fileno' has been explicitly marked deprecated here
        _Check_return_     _CRT_NONSTDC_DEPRECATE(_fileno)    _ACRTIMP int   __cdecl fileno(_In_ FILE* _Stream);
                           ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:428:50: note: expanded from macro '_CRT_NONSTDC_DEPRECATE'
        #define _CRT_NONSTDC_DEPRECATE(_NewName) _CRT_DEPRECATE_TEXT(             \
                                                 ^
C:\Program Files (x86)\Microsoft Visual Studio\2022\BuildTools\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
14 warnings generated.
[34/37] Linking C shared library zlib.dll
[35/37] Linking C static library zlibstatic.lib
[36/37] Linking C executable minigzip.exe
[37/37] Linking C executable example.exe

[madler]

I pushed a commit on the develop branch that should address all of those. Then again, maybe not, since I don't have a way to test it. Please give it try. Thanks.

[sezero]

Commit 985a62d is broken:

• wcstombs_s is not available in every toolchain
• wcstombs_s is most possibly not available in WinCE-targeting toolchains
• _SH_DENYNO needs including share.h, and might not be in every toolchain
• _setmode is not available in DJGPP (i.e. the change in minigzip.c, etc)
• (maybe more, didn't fully check..)

Can it be reverted, please?

[madler]

• (maybe more, didn't fully check..)

@sezero Please complete your examination and let me know what else you believe is broken. Thanks.

[sezero]

• (maybe more, didn't fully check..)

@sezero Please complete your examination and let me know what else you believe is broken. Thanks.

Verified that DJGPP build of test/minigzip.c is broken:

test/minigzip.c: In function `file_compress':
test/minigzip.c:429: warning: passing arg 3 of `string_copy' as unsigned due to prototype
test/minigzip.c: In function `main':
test/minigzip.c:541: warning: implicit declaration of function `_setmode'
test/minigzip.c:541: warning: implicit declaration of function `_fileno'

Same will be true whereever _fileno and _setmode are used: Those
underscore prepended versions of libc calls are for windows-only and
not others.

---

Speaking of djgpp, building libz already has warnings (not related to
this particular ticket, but still:)

gzlib.c: In function `gz_open':
gzlib.c:245: warning: implicit declaration of function `lseek'
i586-pc-msdosdjgpp-gcc -MMD -O3  -Wall -Wwrite-strings -Wpointer-arith -Wconversion -Wstrict-prototypes -Wmissing-prototypes -c gzread.c -o gzread.o
gzread.c: In function `gz_load':
gzread.c:22: warning: implicit declaration of function `read'
gzread.c: In function `gzclose_r':
gzread.c:599: warning: implicit declaration of function `close'
i586-pc-msdosdjgpp-gcc -MMD -O3  -Wall -Wwrite-strings -Wpointer-arith -Wconversion -Wstrict-prototypes -Wmissing-prototypes -c gzwrite.c -o gzwrite.o
gzwrite.c: In function `gz_comp':
gzwrite.c:78: warning: implicit declaration of function `write'
gzwrite.c: In function `gzclose_w':
gzwrite.c:627: warning: implicit declaration of function `close'
deflate.c: In function `deflate_stored':
deflate.c:1671: warning: passing arg 4 of `_tr_stored_block' as signed due to prototype
deflate.c:1795: warning: passing arg 4 of `_tr_stored_block' as signed due to prototype

Including unistd.h fixes the posix file io functions' prototype warnings,
only the last warning from deflate.c remains.

diff --git a/gzguts.h b/gzguts.h
index bd0a6fe..afb14f1 100644
--- a/gzguts.h
+++ b/gzguts.h
@@ -44,6 +44,10 @@
 #  include <sys/stat.h>
 #endif
 
+#if defined __DJGPP__
+#  include <unistd.h>
+#endif
+
 #if defined(_WIN32) && !defined(WIDECHAR)
 #  define WIDECHAR
 #endif

---

Verified that WinCE build is broken. Using a mingw-based toolchain, for e.g.:

$ make -f win32/Makefile.gcc PREFIX=arm-mingw32ce-
[...]
gzlib.c: In function 'gz_strwinerror':
gzlib.c:56:9: warning: implicit declaration of function 'wcstombs_s'; did you mean 'wcstombs'? [-Wimplicit-function-declaration]
   56 |         wcstombs_s(&len, buf, sizeof(buf), msgbuf, chars + 1);
      |         ^~~~~~~~~~
      |         wcstombs
gzlib.c: In function 'gz_open':
gzlib.c:235:9: warning: implicit declaration of function '_wsopen_s'; did you mean '_wopen'? [-Wimplicit-function-declaration]
  235 |         _wsopen_s(&state->fd, path, oflag, _SH_DENYNO, _S_IREAD | _S_IWRITE);
      |         ^~~~~~~~~
      |         _wopen
gzlib.c:9:17: warning: implicit declaration of function '_lseeki64'; did you mean 'gzseek64'? [-Wimplicit-function-declaration]
    9 | #  define LSEEK _lseeki64
      |                 ^~~~~~~~~
gzlib.c:245:9: note: in expansion of macro 'LSEEK'
  245 |         LSEEK(state->fd, 0, SEEK_END);  /* so gzoffset() is correct */
      |         ^~~~~
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x3c8): undefined reference to `wcstombs_s'
gzlib.o:gzlib.c:(.text+0x3c8): relocation truncated to fit: ARM_26 against undefined symbol `wcstombs_s'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x430): undefined reference to `_wsopen_s'
gzlib.o:gzlib.c:(.text+0x430): relocation truncated to fit: ARM_26 against undefined symbol `_wsopen_s'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x448): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0x448): relocation truncated to fit: ARM_26 against undefined symbol `_lseeki64'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x494): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0x494): relocation truncated to fit: ARM_26 against undefined symbol `_lseeki64'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x4d8): undefined reference to `wcstombs_s'
gzlib.o:gzlib.c:(.text+0x4d8): relocation truncated to fit: ARM_26 against undefined symbol `wcstombs_s'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x5a4): undefined reference to `wcstombs_s'
gzlib.o:gzlib.c:(.text+0x5a4): relocation truncated to fit: ARM_26 against undefined symbol `wcstombs_s'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x704): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0x704): relocation truncated to fit: ARM_26 against undefined symbol `_lseeki64'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0x8cc): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0x8cc): relocation truncated to fit: ARM_26 against undefined symbol `_lseeki64'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0xa7c): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0xa7c): relocation truncated to fit: ARM_26 against undefined symbol `_lseeki64'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0xba0): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0xba0): relocation truncated to fit: ARM_26 against undefined symbol `_lseeki64'
/opt/cross_wince-arm/bin/../lib/gcc/arm-mingw32ce/9.3.0/../../../../arm-mingw32ce/bin/ld: gzlib.o:gzlib.c:(.text+0xc04): undefined reference to `_lseeki64'
gzlib.o:gzlib.c:(.text+0xc04): additional relocation overflows omitted from the output
collect2: error: ld returned 1 exit status
make: *** [win32/Makefile.gcc:91: zlib1.dll] Error 1

However, even if I back out the changes from that commit, it's still
broken because _lseeki64 isn't available.

---

I have nothing else, at the moment.

[pmqs]

I pushed a commit on the develop branch that should address all of those. Then again, maybe not, since I don't have a way to test it. Please give it try. Thanks.

Sorry, still seeing warnings with clang 16 on Windows -- it ships with Visual Studio.

All is fine on Linux with clang 16.

[33/37] Building C object CMakeFiles/minigzip.dir/test/minigzip.c.obj
D:/Linux/develop/zlib/test/minigzip.c:431:10: warning: 'fopen' is deprecated: This function or variable may 
be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    in = fopen(file, "rb");
         ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:212:20: note: 'fopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(fopen_s)
                   ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:478:11: warning: 'fopen' is deprecated: This function or variable may 
be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    out = fopen(outfile, "wb");
          ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:212:20: note: 'fopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(fopen_s)
                   ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/minigzip.c:569:33: warning: 'fopen' is deprecated: This function or variable may 
be unsafe. Consider using fopen_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
                    FILE * in = fopen(*argv, "rb");
                                ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\stdio.h:212:20: note: 'fopen' has been explicitly marked deprecated here
    _Check_return_ _CRT_INSECURE_DEPRECATE(fopen_s)
                   ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
3 warnings generated.
[34/37] Building C object CMakeFiles/example.dir/test/example.c.obj
D:/Linux/develop/zlib/test/example.c:70:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro 
'__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:117:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro 
'__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:208:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro 
'__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:300:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro 
'__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:374:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro 
'__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
D:/Linux/develop/zlib/test/example.c:449:5: warning: 'strcpy' is deprecated: This function or variable may be unsafe. Consider using strcpy_s instead. To disable deprecation, use _CRT_SECURE_NO_WARNINGS. See online help for details. [-Wdeprecated-declarations]
    strcpy((char*)uncompr, "garbage");
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\string.h:130:1: note: 'strcpy' has been explicitly marked deprecated here
__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1(
^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:835:5: note: expanded from macro 
'__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1'
    __DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX(_ReturnType, _ReturnPolicy, _DeclSpec, _FuncName, _FuncName##_s, _DstType, _SalAttributeDst, _DstType, _Dst, _TType1, _TArg1)
    ^
C:\Program Files (x86)\Windows Kits\10\include\10.0.22621.0\ucrt\corecrt.h:1894:17: note: expanded from macro '__DEFINE_CPP_OVERLOAD_STANDARD_FUNC_0_1_EX'
                _CRT_INSECURE_DEPRECATE(_SecureFuncName) _DeclSpec _ReturnType __cdecl _FuncName(_SalAttributeDst _DstType *_Dst, _TType1 _TArg1);
                ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:355:55: note: expanded from macro '_CRT_INSECURE_DEPRECATE'
        #define _CRT_INSECURE_DEPRECATE(_Replacement) _CRT_DEPRECATE_TEXT(    \
                                                      ^
C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.38.33130\include\vcruntime.h:345:47: note: expanded from macro '_CRT_DEPRECATE_TEXT'
#define _CRT_DEPRECATE_TEXT(_Text) __declspec(deprecated(_Text))
                                              ^
6 warnings generated.

[sezero]

Sorry, still seeing warnings with clang 16 on Windows -- it ships with Visual Studio.

Possibly the best solution for those warnings is disabling them, like:

#if defined _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif

If, e.g. fopen, is used correctly then those MSVC warnings are just annoying noise.

[madler]

Verified that DJGPP build of test/minigzip.c is broken:
...
Those underscore prepended versions of libc calls are for windows-only and not others.

Yet it appears that DJGPP is definining _WIN32. Is that correct?

[madler]

Possibly the best solution for those warnings is disabling them, like:
...
#define _CRT_SECURE_NO_WARNINGS

Yes, that's what I did for the library, but I missed example.c and minigzip.c.

[madler]

@pmqs Ok, how about now?

[sezero]

Verified that DJGPP build of test/minigzip.c is broken:
...
Those underscore prepended versions of libc calls are for windows-only and not others.

Yet it appears that DJGPP is definining _WIN32. Is that correct?

Most certainly not

[pmqs]

@pmqs Ok, how about now?

That's fine now. Updating the workflow to use this clang + cmake on MSVC

[madler]

@sezero Can you provide the output on DJGPP of gcc -dM -E empty.c, where empty.c is a zero-length file? Thanks.

[sezero]

@sezero Can you provide the output on DJGPP of gcc -dM -E empty.c, where empty.c is a zero-length file?

$  i586-pc-msdosdjgpp-gcc -E -dM -xc /dev/null
#define __GO32 1
#define __DBL_MIN_EXP__ (-1021)
#define __FLT_MIN__ 1.17549435e-38F
#define __CHAR_BIT__ 8
#define __WCHAR_MAX__ 65535U
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __FLT_EVAL_METHOD__ 2
#define __DBL_MIN_10_EXP__ (-307)
#define __FINITE_MATH_ONLY__ 0
#define __GNUC_PATCHLEVEL__ 6
#define __SHRT_MAX__ 32767
#define __LDBL_MAX__ 1.18973149535723176502e+4932L
#define __unix 1
#define __LDBL_MAX_EXP__ 16384
#define __DJGPP 2
#define __SCHAR_MAX__ 127
#define __USER_LABEL_PREFIX__ _
#define __STDC_HOSTED__ 1
#define __LDBL_HAS_INFINITY__ 1
#define __MSDOS__ 1
#define __DBL_DIG__ 15
#define __FLT_EPSILON__ 1.19209290e-7F
#define __LDBL_MIN__ 3.36210314311209350626e-4932L
#define __DJGPP__ 2
#define __unix__ 1
#define __DECIMAL_DIG__ 21
#define __LDBL_HAS_QUIET_NAN__ 1
#define __GNUC__ 3
#define __tune_i586__ 1
#define __DBL_MAX__ 1.7976931348623157e+308
#define __DBL_HAS_INFINITY__ 1
#define __DJGPP_MINOR__ 5
#define __DBL_MAX_EXP__ 1024
#define __LONG_LONG_MAX__ 9223372036854775807LL
#define __GXX_ABI_VERSION 1002
#define __FLT_MIN_EXP__ (-125)
#define __GO32__ 1
#define GO32 1
#define DJGPP_MINOR 5
#define __DBL_MIN__ 2.2250738585072014e-308
#define MSDOS 1
#define __DBL_HAS_QUIET_NAN__ 1
#define __REGISTER_PREFIX__ 
#define __NO_INLINE__ 1
#define __i386 1
#define __FLT_MANT_DIG__ 24
#define __VERSION__ "3.4.6"
#define i386 1
#define unix 1
#define __i386__ 1
#define __SIZE_TYPE__ long unsigned int
#define __FLT_RADIX__ 2
#define __LDBL_EPSILON__ 1.08420217248550443401e-19L
#define __FLT_HAS_QUIET_NAN__ 1
#define __FLT_MAX_10_EXP__ 38
#define __LONG_MAX__ 2147483647L
#define __FLT_HAS_INFINITY__ 1
#define __tune_pentium__ 1
#define DJGPP 2
#define __LDBL_MANT_DIG__ 64
#define __WCHAR_TYPE__ short unsigned int
#define __FLT_DIG__ 6
#define __INT_MAX__ 2147483647
#define __FLT_MAX_EXP__ 128
#define __DBL_MANT_DIG__ 53
#define __WINT_TYPE__ int
#define __LDBL_MIN_EXP__ (-16381)
#define __LDBL_MAX_10_EXP__ 4932
#define __DBL_EPSILON__ 2.2204460492503131e-16
#define __FLT_DENORM_MIN__ 1.40129846e-45F
#define __MSDOS 1
#define __FLT_MAX__ 3.40282347e+38F
#define __FLT_MIN_10_EXP__ (-37)
#define __GNUC_MINOR__ 4
#define __DBL_MAX_10_EXP__ 308
#define __LDBL_DENORM_MIN__ 3.64519953188247460253e-4951L
#define __PTRDIFF_TYPE__ int
#define __LDBL_MIN_10_EXP__ (-4931)
#define __DJGPP_MINOR 5
#define __LDBL_DIG__ 18

[madler]

@sezero Please give the develop branch a try on DJGPP.