ceph/cmake/modules/CheckYasm.cmake

   1 macro(check_yasm_support _object_format _good_result _better_result)
   2   execute_process(
   3     COMMAND yasm -f "${_object_format}" ${CMAKE_SOURCE_DIR}/src/common/crc32c_intel_fast_asm.s -o /dev/null
   4     RESULT_VARIABLE no_yasm
   5     OUTPUT_QUIET)
   6   if(NOT no_yasm)
   7     if(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64")
   8       set(save_quiet ${CMAKE_REQUIRED_QUIET})
   9       set(CMAKE_REQUIRED_QUIET true)
  10       include(CheckCXXSourceCompiles)
  11       check_cxx_source_compiles("
  12       #if defined(__x86_64__) && defined(__ILP32__)
  13       #error x32
  14       #endif
  15       int main() {}
  16       " not_arch_x32)
  17       set(CMAKE_REQUIRED_QUIET ${save_quiet})
  18       if(not_arch_x32)
  19         set(${_good_result} TRUE)
  20         execute_process(COMMAND yasm -f ${object_format} -i
  21           ${CMAKE_SOURCE_DIR}/src/isa-l/include/
  22           ${CMAKE_SOURCE_DIR}/src/isa-l/erasure_code/gf_vect_dot_prod_avx2.asm
  23           -o /dev/null
  24           RESULT_VARIABLE rc
  25           OUTPUT_QUIET)
  26         if(NOT rc)
  27           set(${_better_result} TRUE)
  28         endif(NOT rc)
  29       endif(not_arch_x32)
  30     endif(CMAKE_SYSTEM_PROCESSOR MATCHES "amd64|x86_64")
  31   endif(NOT no_yasm)
  32   if(no_yasm)
  33     message(STATUS "Could NOT find Yasm")
  34   elseif(NOT not_arch_x32)
  35     message(STATUS "Found Yasm: but x86_64 with x32 ABI is not supported")
  36   elseif(${_better_result})
  37     message(STATUS "Found Yasm: good -- capable of assembling x86_64")
  38   elseif(${_good_result})
  39     message(STATUS "Found Yasm: better -- capable of assembling AVX2")
  40   endif()
  41 endmacro()