osx: error: unable to create target: 'Unable to find target for this triple (no targets are registered)'

[timotheecour]

Summary of this issue

---

on OSX 10.15.2 (19C57)
brew install zig
zig version
0.6.0

zig build-exe --c-source thelloc.c --library c

error: unable to create target: 'Unable to find target for this triple (no targets are registered)'
1 error generated.

The following command failed:
/usr/local/Cellar/zig/0.6.0/bin/zig clang -c -nostdinc -fno-spell-checking -target x86_64-unknown-macosx-gnu -isystem /usr/local/Cellar/zig/0.6.0/lib/zig/include -isystem /Library/Developer/CommandLineTools/SDKs/MacOSX.sdk/usr/include -Xclang -target-cpu -Xclang skylake -Xclang -target-feature -Xclang -3dnow,-3dnowa,+64bit,+adx,+aes,+avx,+avx2,-avx512bf16,-avx512bitalg,-avx512bw,-avx512cd,-avx512dq,-avx512er,-avx512f,-avx512ifma,-avx512pf,-avx512vbmi,-avx512vbmi2,-avx512vl,-avx512vnni,-avx512vp2intersect,-avx512vpopcntdq,+bmi,+bmi2,-branchfusion,-cldemote,+clflushopt,-clwb,-clzero,+cmov,+cx16,+cx8,-enqcmd,+ermsb,+f16c,-false-deps-lzcnt-tzcnt,+false-deps-popcnt,-fast-11bytenop,-fast-15bytenop,-fast-bextr,+fast-gather,-fast-hops,-fast-lzcnt,+fast-scalar-fsqrt,-fast-scalar-shift-masks,+fast-shld-rotate,+fast-variable-shuffle,+fast-vector-fsqrt,-fast-vector-shift-masks,+fma,-fma4,+fsgsbase,+fxsr,-gfni,-idivl-to-divb,+idivq-to-divl,+invpcid,-lea-sp,-lea-uses-ag,-lwp,+lzcnt,+macrofusion,+merge-to-threeway-branch,+mmx,+movbe,-movdir64b,-movdiri,-mpx,-mwaitx,+nopl,-pad-short-functions,+pclmul,-pconfig,-pku,+popcnt,-prefer-128-bit,-prefer-256-bit,-prefer-mask-registers,-prefetchwt1,+prfchw,-ptwrite,-rdpid,+rdrnd,+rdseed,-retpoline,-retpoline-external-thunk,-retpoline-indirect-branches,-retpoline-indirect-calls,+rtm,+sahf,+sgx,-sha,-shstk,+slow-3ops-lea,-slow-incdec,-slow-lea,-slow-pmaddwd,-slow-pmulld,-slow-shld,-slow-two-mem-ops,-slow-unaligned-mem-16,-slow-unaligned-mem-32,-soft-float,+sse,-sse-unaligned-mem,+sse2,+sse3,+sse4.1,+sse4.2,-sse4a,+ssse3,-tbm,-use-aa,-use-glm-div-sqrt-costs,-vaes,-vpclmulqdq,+vzeroupper,-waitpkg,-wbnoinvd,+x87,-xop,+xsave,+xsavec,+xsaveopt,+xsaves -MD -MV -MF zig-cache/tmp/twKKHmKNIRM8-thelloc.o.d -g -fno-omit-frame-pointer -fsanitize=undefined -fsanitize-trap=undefined -D_DEBUG -Og -fstack-protector-strong --param ssp-buffer-size=4 -fPIC -o zig-cache/tmp/twKKHmKNIRM8-thelloc.o thelloc.c

// thelloc.c
#include <stdio.h>
int main (int argc, char *argv[]) {
  printf("hello\n");
  return 0;
}

likewise if I do nim c -f --cc:zig hello.nim (which was my original use case, see nim-lang/Nim#13757)

note

• which clang
  /usr/bin/clang

• clang -v
  Apple clang version 11.0.3 (clang-1103.0.32.29)
  Target: x86_64-apple-darwin19.2.0
  Thread model: posix
  InstalledDir: /Library/Developer/CommandLineTools/usr/bin

• brew test zig works but that doesnt' help

• I also tried specifying a target explicitly via -target ... but nothing worked

What if you try to download zig from the website and try with that?

[timotheecour]

great,

here's what works:

• download and unzip https://github.com/ziglang/zig/releases/download/0.6.0/zig-macos-x86_64-0.6.0.tar.xz
• export PATH=/Users/timothee/Downloads/zig-macos-x86_64-0.6.0/:$PATH
• zig build-exe --c-source /Users/timothee/git_clone//nim//timn/src/timn/examples/thelloc.c --library c
• nim c -f --cc:zig -d:nimEmulateOverflowChecks $timn_D/tests/nim/all/t10536.nim
• zig build-exe -target x86_64-windows-gnu --c-source /Users/timothee/git_clone//nim//timn/src/timn/examples/thelloc.c --library c

here's what doesn't work: brew zig

• brew install zig
• brew install --build-from-source zig (after brew uninstall zig)

here's what doesn't work: cross compile from nim

• nim c -f --cc:zig --zig.options.linker:"-target x86_64-windows-gnu" --zig.options.always:"-target x86_64-windows-gnu" $timn_D/tests/nim/all/t10536.nim
  fatal error: 'sys/mman.h' file not found

@timotheecour about the last one which doesn't work (about cross-compiling)
#4897

[andrewrk]

here's what doesn't work: brew zig

This is a homebrew issue and you should file it on the homebrew issue tracker

[andrewrk]

* fatal error: 'sys/mman.h' file not found

The next step to troubleshooting this one is to try to reproduce it without nim

[timotheecour]

This is a homebrew issue and you should file it on the homebrew issue tracker

will do; EDIT: Homebrew/homebrew-core#53198

The next step to troubleshooting this one is to try to reproduce it without nim

will do

but please keep this issue open for now :)

[andrewrk]

but please keep this issue open for now :)

Of course :)

Generally we keep issues open in the zig issue tracker for upstream/downstream issues, even if we're waiting on a third party to change something.

[timotheecour]

@andrewrk it appears instructions to build from source in https://github.com/ziglang/zig don't work and have the same issue, which is why the homebrew formuala also fails: https://github.com/Homebrew/homebrew-core/blob/master/Formula/zig.rb

so this seems like a zig issue, not a homebrew issue:

git clone https://github.com/ziglang/zig
cd zig
brew install cmake llvm
brew outdated llvm || brew upgrade llvm
mkdir build
cd build
cmake .. -DCMAKE_PREFIX_PATH=$(brew --prefix llvm) -DZIG_PREFER_CLANG_CPP_DYLIB=ON
make install # i did instead `make install DESTDIR=/tmp/d01` here

/tmp/d01/Users/timothee/git_clone/zig/build/bin/zig build-exe --c-source /Users/timothee/git_clone//nim//timn/src/timn/examples/thelloc.c --library c
error: unable to create target: 'Unable to find target for this triple (no targets are registered)'

[timotheecour]

@andrewrk update:

• i can build a working zig (working in the sense avoids this issue in top post) by following what CI does here https://github.com/ziglang/zig/blob/master/ci/azure/macos_script#L18 but only when using pre-built llvm+friends, ie the HAVE_CACHE="true" case:

# note: refer to upstream instructions
...
CACHE_BASENAME="llvm+clang+lld-$LLVMVER-$ARCH-macosx-gcc9-release"
wget -nv "https://ziglang.org/builds/$CACHE_BASENAME.tar.xz"
tar xf "$CACHE_BASENAME.tar.xz"
cd $ZIGDIR
mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=$PREFIX -DCMAKE_INSTALL_PREFIX=$(pwd)/release -DZIG_STATIC=ON
make $JOBS install

however, when I don't use pre-built llvm+friends (obviously a non-starter for many cases including homebrew), nothing i tried works:

• those instructions don't work with `HAVE_CACHE="false": it's hitting [TODO] https://github.com/ziglang/zig/wiki/Building-Static-Zig-on-macOS instructions don't work: https://releases.llvm.org/$LLVMVER/llvm-$LLVMVER.src.tar.xz doesn't exist #5063

but even after fixing those paths nothing works:

• I tried building from https://github.com/llvm/llvm-project/releases/download/llvmorg-10.0.0/llvm-project-10.0.0.tar.xz
  both with and without export CC=gcc-9; export CXX=g++-9 and following similar instructions (pairing gcc vs clang accordingly), but this doesn't work, giving a variety of link errors, eg:
• after cmake .. -DCMAKE_PREFIX_PATH=/Users/timothee/build/D20200415T142759_1/llvm-project-10.0.0/build_gcc9/Release -DCMAKE_INSTALL_PREFIX=$(pwd)/release -DZIG_STATIC=ON
  I'm hitting: llvm-config: error: missing: /Users/timothee/build/D20200415T142759_1/llvm-project-10.0.0/build_gcc9/Release/lib/libLLVMTestingSupport.a
  (which seems like this old bug http://lists.llvm.org/pipermail/llvm-bugs/2017-June/056284.html or https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=868141); and indeed. llvm-config --system-libs complains about 3 missing libs:

./release2/bin/llvm-config --libnames
llvm-config: error: component libraries and shared library
llvm-config: error: missing: /Users/timothee/build/D20200415T142759_1/llvm-project-10.0.0/build_gcc9/Release/lib/libgtest.a
llvm-config: error: missing: /Users/timothee/build/D20200415T142759_1/llvm-project-10.0.0/build_gcc9/Release/lib/libgtest_main.a
llvm-config: error: missing: /Users/timothee/build/D20200415T142759_1/llvm-project-10.0.0/build_gcc9/Release/lib/libLLVMTestingSupport.a

if I manually copy those 3 missing libs from build output to release dir (as hinted here http://lists.llvm.org/pipermail/llvm-bugs/2017-June/056284.html), and rerun building zig, it now gives:

Undefined symbols for architecture x86_64:
  "_Z3_ast_to_string", referenced from:
      (anonymous namespace)::Z3Expr::print(llvm::raw_ostream&) const in libLLVMSupport.a(Z3Solver.cpp.o)

which is odd

building without -DZIG_STATIC=ON also doesn't work

I tried different combinations of -DZIG_PREFER_CLANG_CPP_DYLIB=ON and -DZIG_STATIC=ON, or using homebrew built llvm, nothing works.

[update] building (locally) using exact same instructions as https://github.com/ziglang/zig/blob/master/ci/azure/macos_script#L18 (with HAVE_CACHE="false") fails

I'm not running into the above mentioned libLLVMTestingSupport.a issue but I am running again into the other one:

Undefined symbols for architecture x86_64:
  "_Z3_ast_to_string", referenced from:
      (anonymous namespace)::Z3Expr::print(llvm::raw_ostream&) const in libLLVMSupport.a(Z3Solver.cpp.o)
      llvm::SMTExpr::dump() const in libLLVMSupport.a(Z3Solver.cpp.o)

[timotheecour]

EDIT: finally i can build from source a working zig, but via gcc only:

gcc: works

I follow instructions from https://github.com/ziglang/zig/blob/master/ci/azure/macos_script#L18 (with HAVE_CACHE="false" to avoid prebuilt libs) and change

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 27bc6a04f..889eff11f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -359,14 +359,17 @@ endif()

 if(ZIG_STATIC)
     if(APPLE)
-        set(EXE_LDFLAGS "${EXE_LDFLAGS} -static-libgcc -static-libstdc++")
+        # set(EXE_LDFLAGS "${EXE_LDFLAGS} -static-libgcc -static-libstdc++")
+        set(EXE_LDFLAGS "${EXE_LDFLAGS} -static-libgcc -static-libstdc++ -lz3 -L/usr/local/opt/z3/lib ")
     elseif(MINGW)
         set(EXE_LDFLAGS "${EXE_LDFLAGS} -static-libgcc -static-libstdc++ -Wl,-Bstatic, -lwinpthread -lz3 -lz -lgomp")
     elseif(NOT MSVC)
         set(EXE_LDFLAGS "${EXE_LDFLAGS} -static")
     endif()
 else()
-    if(MINGW)
+    if(APPLE)
+        set(EXE_LDFLAGS "${EXE_LDFLAGS} -lz3 -L/usr/local/opt/z3/lib ")
+    elseif(MINGW)
         set(EXE_LDFLAGS "${EXE_LDFLAGS}")
     endif()
 endif()

and then it works both with and without -DZIG_STATIC=ON (but otool -L for -DZIG_STATIC=ON shows /usr/local/opt/z3/lib/libz3.dylib in my setup because of -lz3 -L/usr/local/opt/z3/lib, but linking against static would fail due to gcc vs clang abi issue)

clang: gives non-working zig

this is painful though as it requires building llvm+friends from source using gcc; isn't there a way to use clang? if not I don't see how this could be packaged in homebrew easily (which builds llvm via clang)

EDIT: i tried this:
cmake .. -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=$PREFIX -DCMAKE_INSTALL_PREFIX=$(pwd)/release -DZIG_STATIC=ON -DZIG_PREFER_CLANG_CPP_DYLIB=ON
and also modified

if(ZIG_STATIC)                                                                                                                                                                                                                                                                                  llvm: add polly gpgpu and make rtti optional (https://github.com/Homebrew/homebrew-core/pull/28340)
    if(APPLE)
      set(EXE_LDFLAGS "${EXE_LDFLAGS} -lz3 -L/usr/local/opt/z3/lib ") # if clang
...

and it does build zig, but then has same issue as top post