mk/re: add C11 and Atomic detection #61
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sreimers
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Adding C11 detection (gcc/clang 5.x and newer). It can be disabled with
make CC_C11=. When C11 is detected, it definesHAVE_ATOMIC. This can also be disabled withmake HAVE_ATOMIC=.Fallback tested on centos 7 with gcc 4.x and clang 3.x (
clang -dumpversionshows 4.x gcc compatibility version and not the real version).