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Revert "[CMake] Use __libc_start_main rather than fopen when checking for C library"

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This reverts commit r352341: it broke the build on macOS which doesn't
seem to provide __libc_start_main in its C library.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@352411 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Petr Hosek 2019-01-28 19:26:41 +00:00
parent 728ff6c67c
commit d0f8c40a1e
1 changed files with 1 additions and 1 deletions
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2
runtimes/CMakeLists.txt
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@ -98,7 +98,7 @@ if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_CURRENT_SOURCE_DIR})
include(CheckLibraryExists)
include(CheckCCompilerFlag)
check_library_exists(c __libc_start_main "" LLVM_HAS_C_LIB)
check_library_exists(c fopen "" LLVM_HAS_C_LIB)
check_c_compiler_flag(-nodefaultlibs LLVM_HAS_NODEFAULTLIBS_FLAG)
if(LLVM_HAS_NODEFAULTLIBS_FLAG)
set(CMAKE_REQUIRED_FLAGS "${CMAKE_REQUIRED_FLAGS} -nodefaultlibs")