cmake HAVE_SSE41 examples

KhronosGroup/Vulkan-Samples bldsys/cmake/module/FindSSE41.cmake :117 

unset(HAVE_SSE41 CACHE)

KhronosGroup/Vulkan-Samples bldsys/cmake/module/FindSSE41.cmake :121 

check_c_source_compiles("${SSE41_C_TEST_SOURCE}" HAVE_SSE41)

pingcap/tiflash cmake/cpu_features.cmake :125 

check_cxx_source_compiles("
        #include <smmintrin.h>
        int main() {
            auto a = _mm_insert_epi8(__m128i(), 0, 0);
            (void)a;
            return 0;
        }
    " HAVE_SSE41)

H-uru/Plasma cmake/CompilerChecks.cmake :46 

CHECK_INCLUDE_FILE("smmintrin.h" HAVE_SSE41)