From 0bd1a0fac1d1fb4a28c7882a1aa5f7ff2dfdcfbb Mon Sep 17 00:00:00 2001 From: Petr Hosek Date: Tue, 30 Oct 2018 19:19:47 +0000 Subject: [PATCH] [CMake] Check -ffreestanding as C not C++ flag When -ffreestanding is used, main() isn't considered special and when compiled as C++ code it'll get mangled which makes the compilation fail since main() will be undefined so this check will never succeed. Differential Revision: https://reviews.llvm.org/D49332 llvm-svn: 345632 --- compiler-rt/cmake/config-ix.cmake | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/compiler-rt/cmake/config-ix.cmake b/compiler-rt/cmake/config-ix.cmake index 27097b7e9b34..8ab9f1f29d94 100644 --- a/compiler-rt/cmake/config-ix.cmake +++ b/compiler-rt/cmake/config-ix.cmake @@ -53,6 +53,7 @@ if (COMPILER_RT_HAS_NODEFAULTLIBS_FLAG) endif () # CodeGen options. +check_c_compiler_flag(-ffreestanding COMPILER_RT_HAS_FFREESTANDING_FLAG) check_cxx_compiler_flag(-fPIC COMPILER_RT_HAS_FPIC_FLAG) check_cxx_compiler_flag(-fPIE COMPILER_RT_HAS_FPIE_FLAG) check_cxx_compiler_flag(-fno-builtin COMPILER_RT_HAS_FNO_BUILTIN_FLAG) @@ -64,7 +65,6 @@ check_cxx_compiler_flag(-fno-sanitize=safe-stack COMPILER_RT_HAS_FNO_SANITIZE_SA check_cxx_compiler_flag(-fvisibility=hidden COMPILER_RT_HAS_FVISIBILITY_HIDDEN_FLAG) check_cxx_compiler_flag(-frtti COMPILER_RT_HAS_FRTTI_FLAG) check_cxx_compiler_flag(-fno-rtti COMPILER_RT_HAS_FNO_RTTI_FLAG) -check_cxx_compiler_flag(-ffreestanding COMPILER_RT_HAS_FFREESTANDING_FLAG) check_cxx_compiler_flag("-Werror -fno-function-sections" COMPILER_RT_HAS_FNO_FUNCTION_SECTIONS_FLAG) check_cxx_compiler_flag(-std=c++11 COMPILER_RT_HAS_STD_CXX11_FLAG) check_cxx_compiler_flag(-ftls-model=initial-exec COMPILER_RT_HAS_FTLS_MODEL_INITIAL_EXEC)