CMAKE: help CheckAtomic find check_library_exists

martell · martell · commit 1f75b63867a9 · 2017-12-02T07:17:01.000Z
lldb fails to build standalone on x86 -- Performing Test HAVE_CXX_ATOMICS64_WITHOUT_LIB - Failed CMake Error at CheckAtomic.cmake:66 (check_library_exists): Unknown CMake command "check_library_exists". Call Stack (most recent call first): LLDBStandalone.cmake:90 (include) CMakeLists.txt:3 (include) Reviewed By: rnk Differential Revision: https://reviews.llvm.org/D40220 llvm-svn: 319610
diff --git a/llvm/cmake/modules/CheckAtomic.cmake b/llvm/cmake/modules/CheckAtomic.cmake
@@ -1,6 +1,7 @@
 # atomic builtins are required for threading support.
 
 INCLUDE(CheckCXXSourceCompiles)
+INCLUDE(CheckLibraryExists)
 
 # Sometimes linking against libatomic is required for atomic ops, if
 # the platform doesn't support lock-free atomics.
