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CMAKE: help CheckAtomic find check_library_exists

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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
This commit is contained in:
Martell Malone 2017-12-02 07:17:01 +00:00
parent ea3c2504e7
commit 34f65497f3
1 changed files with 1 additions and 0 deletions
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cmake/modules/CheckAtomic.cmake
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@ -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.