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/libcxxabi/trunk@352411 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index 4be7adc..379b554 100644
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -2,7 +2,7 @@
include(CheckCCompilerFlag)
include(CheckCXXCompilerFlag)
-check_library_exists(c __libc_start_main "" LIBCXXABI_HAS_C_LIB)
+check_library_exists(c fopen "" LIBCXXABI_HAS_C_LIB)
if (NOT LIBCXXABI_USE_COMPILER_RT)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_S_LIB)
endif ()
