[llvm] r352411 - Revert "[CMake] Use __libc_start_main rather than fopen when checking for C library"

[Petr Hosek via llvm-commits]

Author: phosek
Date: Mon Jan 28 11:26:41 2019
New Revision: 352411

URL: http://llvm.org/viewvc/llvm-project?rev=352411&view=rev
Log:
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.

Modified:
    llvm/trunk/runtimes/CMakeLists.txt

Modified: llvm/trunk/runtimes/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/runtimes/CMakeLists.txt?rev=352411&r1=352410&r2=352411&view=diff
==============================================================================
--- llvm/trunk/runtimes/CMakeLists.txt (original)
+++ llvm/trunk/runtimes/CMakeLists.txt Mon Jan 28 11:26:41 2019
@@ -98,7 +98,7 @@ if(${CMAKE_SOURCE_DIR} STREQUAL ${CMAKE_
   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")