cmake HAVE_SYNC_ATOMIC_SUPPORT examples

reverbrain/eblob cmake/Modules/CheckAtomic.cmake :7 

check_c_source_compiles("int main()
{
    long var;
    __sync_add_and_fetch(&var, 1);
    return 0;
}" HAVE_SYNC_ATOMIC_SUPPORT)

reverbrain/eblob cmake/Modules/CheckAtomic.cmake :14 

add_definitions(-DHAVE_SYNC_ATOMIC_SUPPORT=1)

reverbrain/eblob cmake/Modules/CheckAtomic.cmake :17 

message(STATUS "__sync support: ${HAVE_SYNC_ATOMIC_SUPPORT}")