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/libunwind/trunk@352411 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index c0c9a53..670c31f 100644
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -3,7 +3,7 @@
include(CheckCXXCompilerFlag)
include(CheckLibraryExists)
-check_library_exists(c __libc_start_main "" LIBUNWIND_HAS_C_LIB)
+check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB)
if (NOT LIBUNWIND_USE_COMPILER_RT)
check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB)
