[CMake] Detecting Compiler

[James Bigler]

Hi,

Mike Jackson wrote:
> I looked and looked but I know it is simple but I just can not find the 
> answer:
> 
> I want to add some flags given a certain compiler (like the intel 
> compiler).. how should I proceed?
> 
> IF (COMPILER matches INTEL) ?? Will that work?
> 
> This is on OS X if that matters.
> 
> 
> Also looking down in /usr/local/share/cmake/modules/platform I see a 
> pair of Darwin.* files. Can we get one in there for the intel compilers 
> for OS X? what information is needed to build one?

CMake seems to come with built in detection of GCC, but not for other 
compilers (see Modules/CMakeDetermineCCompiler.cmake).

This is what I use:

IF(NOT CMAKE_COMPILER_IS_GNUCC)
   # This regular expression also matches things like icc-9.1
   IF   (CMAKE_C_COMPILER MATCHES ${MANTA_COMPILER_NAME_REGEXPR})
     SET(USING_ICC TRUE)
   ENDIF(CMAKE_C_COMPILER MATCHES ${MANTA_COMPILER_NAME_REGEXPR})
ELSE(NOT CMAKE_COMPILER_IS_GNUCC)
   SET(USING_GCC TRUE)
ENDIF(NOT CMAKE_COMPILER_IS_GNUCC)

SET(MANTA_COMPILER_NAME_REGEXPR "icpc.*$")
IF(NOT CMAKE_COMPILER_IS_GNUCXX)
   IF   (CMAKE_CXX_COMPILER MATCHES ${MANTA_COMPILER_NAME_REGEXPR})
     SET(USING_ICPC TRUE)

     EXEC_PROGRAM(${CMAKE_CXX_COMPILER}
       ARGS --version
       OUTPUT_VARIABLE TEMP)

     STRING(REGEX MATCH "([0-9\\.]+)"
       INTEL_COMPILER_VERSION
       ${TEMP})

     MARK_AS_ADVANCED(INTEL_COMPILER_VERSION)
   ENDIF(CMAKE_CXX_COMPILER MATCHES ${MANTA_COMPILER_NAME_REGEXPR})
ELSE(NOT CMAKE_COMPILER_IS_GNUCXX)
   SET(USING_GPP TRUE)
ENDIF(NOT CMAKE_COMPILER_IS_GNUCXX)


-------------------------------------
James