From 2efb013a5124a9f9ae6ca86ca74d89f62fde992d Mon Sep 17 00:00:00 2001
From: Omair Majid <omajid@redhat.com>
Date: Tue, 14 Apr 2020 13:34:16 -0400
Subject: [PATCH] Fix corefx to build on clang 10

Clang 10 adds/enables new warnings, some of which is affecting the
corefx code. Disable them.

This is a "backport" of dotnet/runtime#33734 to corefx.

After this commit, I can build all of corefx with Clang 10.
---
 src/Native/Unix/CMakeLists.txt  | 7 +++++++
 src/Native/Unix/configure.cmake | 4 ++++
 2 files changed, 11 insertions(+)

diff --git a/src/Native/Unix/CMakeLists.txt b/src/Native/Unix/CMakeLists.txt
index f1d6a9ac599b..d2f7540926d9 100644
--- a/src/Native/Unix/CMakeLists.txt
+++ b/src/Native/Unix/CMakeLists.txt
@@ -247,6 +247,13 @@ endfunction()
 
 include(configure.cmake)
 
+if (HAVE_WNO_ALLOCA)
+    add_compile_options(-Wno-alloca)
+endif()
+if (HAVE_WNO_IMPLICIT_INT_FLOAT_CONVERSION)
+    add_compile_options(-Wno-implicit-int-float-conversion)
+endif()
+
 if (NOT CLR_CMAKE_PLATFORM_WASM)
     add_subdirectory(System.IO.Compression.Native)
 	add_subdirectory(System.IO.Ports.Native)
diff --git a/src/Native/Unix/configure.cmake b/src/Native/Unix/configure.cmake
index 061c40e6a64a..6756ea26a5e3 100644
--- a/src/Native/Unix/configure.cmake
+++ b/src/Native/Unix/configure.cmake
@@ -1,3 +1,4 @@
+include(CheckCCompilerFlag)
 include(CheckCSourceCompiles)
 include(CheckCSourceRuns)
 include(CheckFunctionExists)
@@ -31,6 +32,9 @@ endif ()
 # which are not distinguished from the test failing. So no error for that one.
 set(CMAKE_REQUIRED_FLAGS "-Werror -Wno-error=unused-value")
 
+check_c_compiler_flag(-Wno-alloca HAVE_WNO_ALLOCA)
+check_c_compiler_flag(-Wno-implicit-int-float-conversion HAVE_WNO_IMPLICIT_INT_FLOAT_CONVERSION)
+
 # in_pktinfo: Find whether this struct exists
 check_include_files(
     "sys/socket.h;linux/in.h"