diff options
| -rw-r--r-- | CMakeLists.txt | 44 |
1 files changed, 25 insertions, 19 deletions
diff --git a/CMakeLists.txt b/CMakeLists.txt index 6e3cd6f8..128e4a47 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -829,26 +829,32 @@ if(HAVE_IMMINTRIN_H) tuklib_add_definition_if(liblzma HAVE__MM_MOVEMASK_EPI8) # CLMUL intrinsic: - check_c_source_compiles(" - #include <immintrin.h> - #if defined(__e2k__) && __iset__ < 6 - # error - #endif - #if (defined(__GNUC__) || defined(__clang__)) && !defined(__EDG__) - __attribute__((__target__(\"ssse3,sse4.1,pclmul\"))) - #endif - __m128i my_clmul(__m128i a) - { - const __m128i b = _mm_set_epi64x(1, 2); - return _mm_clmulepi64_si128(a, b, 0); - } - int main(void) { return 0; } - " - HAVE_USABLE_CLMUL) + option(ALLOW_CLMUL_CRC "Allow carryless multiplication for CRC \ +calculation if supported by the system" ON) + + if(ALLOW_CLMUL_CRC) + check_c_source_compiles(" + #include <immintrin.h> + #if defined(__e2k__) && __iset__ < 6 + # error + #endif + #if (defined(__GNUC__) || defined(__clang__)) \ + && !defined(__EDG__) + __attribute__((__target__(\"ssse3,sse4.1,pclmul\"))) + #endif + __m128i my_clmul(__m128i a) + { + const __m128i b = _mm_set_epi64x(1, 2); + return _mm_clmulepi64_si128(a, b, 0); + } + int main(void) { return 0; } + " + HAVE_USABLE_CLMUL) - if(HAVE_USABLE_CLMUL) - target_sources(liblzma PRIVATE src/liblzma/check/crc_clmul.c) - target_compile_definitions(liblzma PRIVATE HAVE_USABLE_CLMUL) + if(HAVE_USABLE_CLMUL) + target_sources(liblzma PRIVATE src/liblzma/check/crc_clmul.c) + target_compile_definitions(liblzma PRIVATE HAVE_USABLE_CLMUL) + endif() endif() endif() |