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

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/libcxx/trunk@352411 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Petr Hosek
2019-01-28 19:26:41 +00:00
parent d9cf3925b1
commit 1d9cc94e89

View File

@@ -7,7 +7,7 @@ if(WIN32 AND NOT MINGW)
# let the default linking take care of that.
set(LIBCXX_HAS_C_LIB NO)
else()
check_library_exists(c __libc_start_main "" LIBCXX_HAS_C_LIB)
check_library_exists(c fopen "" LIBCXX_HAS_C_LIB)
endif()
if (NOT LIBCXX_USE_COMPILER_RT)