[compiler-rt] r280416 - [CMake] Add option (defaulted off) to exclude atomic.c

[Chris Bieneman via llvm-commits]

Author: cbieneman
Date: Thu Sep  1 16:05:49 2016
New Revision: 280416

URL: http://llvm.org/viewvc/llvm-project?rev=280416&view=rev
Log:
[CMake] Add option (defaulted off) to exclude atomic.c

The atomic builtin source is problematic when cross-compiling builtins because it requires a variable and sometimes large set of system headers. This option allows users to optionally prevent it from being built.

Modified:
    compiler-rt/trunk/lib/builtins/CMakeLists.txt

Modified: compiler-rt/trunk/lib/builtins/CMakeLists.txt
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/builtins/CMakeLists.txt?rev=280416&r1=280415&r2=280416&view=diff
==============================================================================
--- compiler-rt/trunk/lib/builtins/CMakeLists.txt (original)
+++ compiler-rt/trunk/lib/builtins/CMakeLists.txt Thu Sep  1 16:05:49 2016
@@ -164,7 +164,11 @@ set(GENERIC_SOURCES
   umodsi3.c
   umodti3.c)
 
-if(COMPILER_RT_HAS_ATOMIC_KEYWORD)
+option(COMPILER_RT_EXCLUDE_ATOMIC_BUILTIN
+  "Skip the atomic builtin (this may be needed if system headers are unavailable)"
+  Off)
+
+if(COMPILER_RT_HAS_ATOMIC_KEYWORD AND NOT COMPILER_RT_EXCLUDE_ATOMIC_BUILTIN)
   set(GENERIC_SOURCES
     ${GENERIC_SOURCES}
     atomic.c)