Replace cmake check for printf with a check for fopen.
Printf is a builtin, and the check fails with -Werror because of a clang
warning about an incompatible redeclaration.
git-svn-id: https://llvm.org/svn/llvm-project/libunwind/trunk@255188 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/cmake/config-ix.cmake b/cmake/config-ix.cmake
index a36f978..32669e0 100644
--- a/cmake/config-ix.cmake
+++ b/cmake/config-ix.cmake
@@ -39,7 +39,7 @@
check_cxx_compiler_flag(/EHa- LIBUNWIND_HAS_NO_EHA_FLAG)
check_cxx_compiler_flag(/GR- LIBUNWIND_HAS_NO_GR_FLAG)
-check_library_exists(c printf "" LIBUNWIND_HAS_C_LIB)
+check_library_exists(c fopen "" LIBUNWIND_HAS_C_LIB)
check_library_exists(dl dladdr "" LIBUNWIND_HAS_DL_LIB)
check_library_exists(pthread pthread_once "" LIBUNWIND_HAS_PTHREAD_LIB)
