Index: compiler-rt/cmake/config-ix.cmake =================================================================== --- compiler-rt/cmake/config-ix.cmake +++ compiler-rt/cmake/config-ix.cmake @@ -12,7 +12,7 @@ cmake_pop_check_state() endfunction() -check_library_exists(c fopen "" COMPILER_RT_HAS_LIBC) +check_library_exists(c atexit "" COMPILER_RT_HAS_LIBC) if (COMPILER_RT_USE_BUILTINS_LIBRARY) include(HandleCompilerRT) find_compiler_rt_library(builtins COMPILER_RT_BUILTINS_LIBRARY) Index: libcxx/cmake/config-ix.cmake =================================================================== --- libcxx/cmake/config-ix.cmake +++ libcxx/cmake/config-ix.cmake @@ -7,7 +7,7 @@ # let the default linking take care of that. set(LIBCXX_HAS_C_LIB NO) else() - check_library_exists(c fopen "" LIBCXX_HAS_C_LIB) + check_library_exists(c atexit "" LIBCXX_HAS_C_LIB) endif() if (NOT LIBCXX_USE_COMPILER_RT) Index: libcxxabi/cmake/config-ix.cmake =================================================================== --- libcxxabi/cmake/config-ix.cmake +++ libcxxabi/cmake/config-ix.cmake @@ -2,7 +2,7 @@ include(CheckCCompilerFlag) include(CheckCXXCompilerFlag) -check_library_exists(c fopen "" LIBCXXABI_HAS_C_LIB) +check_library_exists(c atexit "" LIBCXXABI_HAS_C_LIB) if (NOT LIBCXXABI_USE_COMPILER_RT) check_library_exists(gcc_s __gcc_personality_v0 "" LIBCXXABI_HAS_GCC_S_LIB) endif () Index: libunwind/cmake/config-ix.cmake =================================================================== --- libunwind/cmake/config-ix.cmake +++ libunwind/cmake/config-ix.cmake @@ -3,7 +3,7 @@ include(CheckCXXCompilerFlag) include(CheckLibraryExists) -check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB) +check_library_exists(c atexit "" LIBUNWIND_HAS_C_LIB) if (NOT LIBUNWIND_USE_COMPILER_RT) check_library_exists(gcc_s __gcc_personality_v0 "" LIBUNWIND_HAS_GCC_S_LIB) Index: llvm/runtimes/CMakeLists.txt =================================================================== --- llvm/runtimes/CMakeLists.txt +++ llvm/runtimes/CMakeLists.txt @@ -98,7 +98,7 @@ include(CheckLibraryExists) include(CheckCCompilerFlag) - check_library_exists(c fopen "" LLVM_HAS_C_LIB) + check_library_exists(c atexit "" 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")