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# -*- mode: cmake; -*-
#
# Figure out the version of the used compiler
# Variables set by this module
# CMAKE_CXX_COMPILER_MAJOR major version of compiler
# CMAKE_CXX_COMPILER_MINR minor version of compiler
# CMAKE_CXX_COMPILER_PATCH patch level (e.g. gcc 4.1.0)
#
# check the version of the compiler
set(CMAKE_CXX_COMPILER_MAJOR "CMAKE_CXX_COMPILER_MAJOR-NOTFOUND")
set(CMAKE_CXX_COMPILER_MINOR "CMAKE_CXX_COMPILER_MINOR-NOTFOUND")
set(CMAKE_CXX_COMPILER_PATCH "CMAKE_CXX_COMPILER_PATCH-NOTFOUND")
# only available in Cmake 2.8.9,
# extract version from command line if not available
if(NOT CMAKE_CXX_COMPILER_VERSION)
# extract the version of the compiler
if( ${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion
OUTPUT_VARIABLE CMAKE_CXX_COMPILER_VERSION)
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\1"
CMAKE_CXX_COMPILER_MAJOR ${CMAKE_CXX_COMPILER_VERSION})
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*" "\\2"
CMAKE_CXX_COMPILER_MINOR ${CMAKE_CXX_COMPILER_VERSION})
set(CMAKE_CXX_COMPILER_PATCH "")
endif( ${CMAKE_CXX_COMPILER_ID} STREQUAL "Intel")
if( ${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
execute_process(COMMAND ${CMAKE_CXX_COMPILER} -dumpversion
OUTPUT_VARIABLE CMAKE_CXX_COMPILER_VERSION)
string(STRIP ${CMAKE_CXX_COMPILER_VERSION} CMAKE_CXX_COMPILER_VERSION)
string(REGEX REPLACE "^([0-9]+).*$" "\\1"
CMAKE_CXX_COMPILER_MAJOR ${CMAKE_CXX_COMPILER_VERSION})
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+).*$" "\\2"
CMAKE_CXX_COMPILER_MINOR ${CMAKE_CXX_COMPILER_VERSION})
string(REGEX REPLACE "^([0-9]+)\\.([0-9]+)\\.([0-9]+)$" "\\3"
CMAKE_CXX_COMPILER_PATCH ${CMAKE_CXX_COMPILER_VERSION})
endif( ${CMAKE_CXX_COMPILER_ID} STREQUAL "GNU")
else(NOT CMAKE_CXX_COMPILER_VERSION)
string(REGEX MATCH "([0-9]*)\\.([0-9]*)\\.([0-9]*)" major ${CMAKE_CXX_COMPILER_VERSION})
set(CMAKE_CXX_COMPILER_MAJOR ${CMAKE_MATCH_1})
set(CMAKE_CXX_COMPILER_MINOR ${CMAKE_MATCH_2})
set(CMAKE_CXX_COMPILER_PATCH ${CMAKE_MATCH_3})
endif(NOT CMAKE_CXX_COMPILER_VERSION)
# just print the results if requested
function(info_compiler)
message(STATUS "CMAKE_FORCE_CXX_COMPILER = '${CMAKE_FORCE_CXX_COMPILER}'")
message(STATUS "CMAKE_CXX_COMPILER = '${CMAKE_CXX_COMPILER}'")
message(STATUS "CMAKE_CXX_COMPILER_ID = '${CMAKE_CXX_COMPILER_ID}'")
message(STATUS "CMAKE_CXX_COMPILER_INIT = '${CMAKE_CXX_COMPILER_INIT}'")
message(STATUS "CMAKE_GENERATOR_CXX = '${CMAKE_GENERATOR_CXX}'")
message(STATUS "CMAKE_GNULD_IMAGE_VERSION = '${CMAKE_GNULD_IMAGE_VERSION}'")
message(STATUS "CMAKE_CXX_COMPILER_VERSION= '${CMAKE_CXX_COMPILER_VERSION}'")
message(STATUS "CMAKE_CXX_COMPILER_MAJOR = '${CMAKE_CXX_COMPILER_MAJOR}'")
message(STATUS "CMAKE_CXX_COMPILER_MINOR = '${CMAKE_CXX_COMPILER_MINOR}'")
message(STATUS "CMAKE_CXX_COMPILER_PATCH = '${CMAKE_CXX_COMPILER_PATCH}'")
endfunction(info_compiler)
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