cmake/gmxCFlags.cmake

   1 MACRO(gmx_c_flags)
   2
   3 include(CheckCCompilerFlag)
   4
   5 if( CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX )
   6   CHECK_C_COMPILER_FLAG( "-O3" XFLAGS_O3)
   7   IF (XFLAGS_O3)
   8     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -O3")
   9   ENDIF(XFLAGS_O3)
  10
  11   CHECK_C_COMPILER_FLAG( "-Wall -Wno-unused" XFLAGS_WARN)
  12   IF (XFLAGS_WARN)
  13     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wno-unused")
  14   ENDIF(XFLAGS_WARN)
  15   CHECK_C_COMPILER_FLAG( "-std=gnu99" XFLAGS_GNU99)
  16   IF (XFLAGS_GNU99)
  17     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99")
  18   ENDIF(XFLAGS_GNU99)
  19
  20   # new in gcc 4.5
  21   CHECK_C_COMPILER_FLAG( "-fexcess-precision=fast" XFLAGS_EXCESS_PRECISION)
  22   IF (XFLAGS_EXCESS_PRECISION)
  23     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexcess-precision=fast")
  24   ENDIF (XFLAGS_EXCESS_PRECISION)
  25
  26   CHECK_C_COMPILER_FLAG( "-march=native" XFLAGS_MARCH)
  27   IF (XFLAGS_MARCH)
  28     set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -march=native")
  29   ENDIF(XFLAGS_MARCH)
  30 endif( CMAKE_COMPILER_IS_GNUCC OR CMAKE_COMPILER_IS_GNUCXX )
  31
  32 MARK_AS_ADVANCED(XFLAGS_O3 XFLAGS_WARN XFLAGS_GNU99 XFLAGS_MARCH)
  33
  34 ENDMACRO(gmx_c_flags)