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# determine the compiler to use for C++ programs
# NOTE, a generator may set CMAKE_CXX_COMPILER before
# loading this file to force a compiler.
# use environment variable CXX first if defined by user, next use
# the cmake variable CMAKE_GENERATOR_CXX which can be defined by a generator
# as a default compiler
#
# Sets the following variables:
# CMAKE_CXX_COMPILER
# CMAKE_COMPILER_IS_GNUCXX
# CMAKE_AR
# CMAKE_RANLIB
IF(NOT CMAKE_CXX_COMPILER)
SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
# prefer the environment variable CXX
IF($ENV{CXX} MATCHES ".+")
GET_FILENAME_COMPONENT(CMAKE_CXX_COMPILER_INIT $ENV{CXX} PROGRAM PROGRAM_ARGS CMAKE_CXX_FLAGS_ENV_INIT)
IF(CMAKE_CXX_FLAGS_ENV_INIT)
SET(CMAKE_CXX_COMPILER_ARG1 "${CMAKE_CXX_FLAGS_ENV_INIT}" CACHE STRING "First argument to CXX compiler")
ENDIF(CMAKE_CXX_FLAGS_ENV_INIT)
IF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
ELSE(EXISTS ${CMAKE_CXX_COMPILER_INIT})
MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CXX:\n$ENV{CXX}.\n${CMAKE_CXX_COMPILER_INIT}")
ENDIF(EXISTS ${CMAKE_CXX_COMPILER_INIT})
ENDIF($ENV{CXX} MATCHES ".+")
# next prefer the generator specified compiler
IF(CMAKE_GENERATOR_CXX)
IF(NOT CMAKE_CXX_COMPILER_INIT)
SET(CMAKE_CXX_COMPILER_INIT ${CMAKE_GENERATOR_CXX})
ENDIF(NOT CMAKE_CXX_COMPILER_INIT)
ENDIF(CMAKE_GENERATOR_CXX)
# finally list compilers to try
IF(CMAKE_CXX_COMPILER_INIT)
SET(CMAKE_CXX_COMPILER_LIST ${CMAKE_CXX_COMPILER_INIT})
ELSE(CMAKE_CXX_COMPILER_INIT)
SET(CMAKE_CXX_COMPILER_LIST c++ g++ CC aCC cl bcc xlC)
ENDIF(CMAKE_CXX_COMPILER_INIT)
# Find the compiler.
FIND_PROGRAM(CMAKE_CXX_COMPILER NAMES ${CMAKE_CXX_COMPILER_LIST} DOC "C++ compiler")
IF(CMAKE_CXX_COMPILER_INIT AND NOT CMAKE_CXX_COMPILER)
SET(CMAKE_CXX_COMPILER "${CMAKE_CXX_COMPILER_INIT}" CACHE FILEPATH "C++ compiler" FORCE)
ENDIF(CMAKE_CXX_COMPILER_INIT AND NOT CMAKE_CXX_COMPILER)
ENDIF(NOT CMAKE_CXX_COMPILER)
MARK_AS_ADVANCED(CMAKE_CXX_COMPILER)
GET_FILENAME_COMPONENT(COMPILER_LOCATION "${CMAKE_CXX_COMPILER}" PATH)
FIND_PROGRAM(CMAKE_AR NAMES ar PATHS ${COMPILER_LOCATION})
MARK_AS_ADVANCED(CMAKE_AR)
FIND_PROGRAM(CMAKE_RANLIB NAMES ranlib)
IF(NOT CMAKE_RANLIB)
SET(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib")
ENDIF(NOT CMAKE_RANLIB)
MARK_AS_ADVANCED(CMAKE_RANLIB)
# This block was used before the compiler was identified by building a
# source file. Unless g++ crashes when building a small C++
# executable this should no longer be needed.
#
# The g++ that comes with BeOS 5 segfaults if you run "g++ -E"
# ("gcc -E" is fine), which throws up a system dialog box that hangs cmake
# until the user clicks "OK"...so for now, we just assume it's g++.
# IF(BEOS)
# SET(CMAKE_COMPILER_IS_GNUCXX 1)
# SET(CMAKE_COMPILER_IS_GNUCXX_RUN 1)
# ENDIF(BEOS)
# Build a small source file to identify the compiler.
IF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
SET(CMAKE_CXX_COMPILER_ID_RUN 1)
SET(CMAKE_CXX_PLATFORM_ID "Windows")
# TODO: Set the compiler id. It is probably MSVC but
# the user may be using an integrated Intel compiler.
# SET(CMAKE_CXX_COMPILER_ID "MSVC")
ENDIF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
IF(NOT CMAKE_CXX_COMPILER_ID_RUN)
SET(CMAKE_CXX_COMPILER_ID_RUN 1)
# Try to identify the compiler.
SET(CMAKE_CXX_COMPILER_ID)
INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
CMAKE_DETERMINE_COMPILER_ID(CXX ${CMAKE_ROOT}/Modules/CMakeCXXCompilerId.cpp)
# Set old compiler and platform id variables.
IF("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
SET(CMAKE_COMPILER_IS_GNUCXX 1)
ENDIF("${CMAKE_CXX_COMPILER_ID}" MATCHES "GNU")
IF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW")
SET(CMAKE_COMPILER_IS_MINGW 1)
ELSEIF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "Cygwin")
SET(CMAKE_COMPILER_IS_CYGWIN 1)
ENDIF("${CMAKE_CXX_PLATFORM_ID}" MATCHES "MinGW")
ENDIF(NOT CMAKE_CXX_COMPILER_ID_RUN)
# configure all variables set in this file
CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCXXCompiler.cmake.in
${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeCXXCompiler.cmake IMMEDIATE)
SET(CMAKE_CXX_COMPILER_ENV_VAR "CXX")
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