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# determine the compiler to use for C programs
# NOTE, a generator may set CMAKE_C_COMPILER before
# loading this file to force a compiler.
# use environment variable CCC first if defined by user, next use
# the cmake variable CMAKE_GENERATOR_CC which can be defined by a generator
# as a default compiler
IF(NOT CMAKE_C_COMPILER)
SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
# prefer the environment variable CC
IF($ENV{CC} MATCHES ".+")
GET_FILENAME_COMPONENT(CMAKE_C_COMPILER_INIT $ENV{CC} PROGRAM PROGRAM_ARGS CMAKE_C_FLAGS_ENV_INIT)
IF(EXISTS ${CMAKE_C_COMPILER_INIT})
ELSE(EXISTS ${CMAKE_C_COMPILER_INIT})
MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CC:\n$ENV{CC}.")
ENDIF(EXISTS ${CMAKE_C_COMPILER_INIT})
ENDIF($ENV{CC} MATCHES ".+")
# next try prefer the compiler specified by the generator
IF(CMAKE_GENERATOR_CC)
IF(NOT CMAKE_C_COMPILER_INIT)
SET(CMAKE_C_COMPILER_INIT ${CMAKE_GENERATOR_CC})
ENDIF(NOT CMAKE_C_COMPILER_INIT)
ENDIF(CMAKE_GENERATOR_CC)
# if no compiler has been specified yet, then look for one
IF(NOT CMAKE_C_COMPILER_INIT)
# if not in the envionment then search for the compiler in the path
SET(CMAKE_C_COMPILER_LIST gcc cc cl bcc xlc)
FIND_PROGRAM(CMAKE_C_COMPILER_FULLPATH NAMES ${CMAKE_C_COMPILER_LIST} )
GET_FILENAME_COMPONENT(CMAKE_C_COMPILER_INIT
${CMAKE_C_COMPILER_FULLPATH} NAME)
SET(CMAKE_C_COMPILER_FULLPATH "${CMAKE_C_COMPILER_FULLPATH}" CACHE INTERNAL "full path to the compiler cmake found")
ENDIF(NOT CMAKE_C_COMPILER_INIT)
SET(CMAKE_C_COMPILER ${CMAKE_C_COMPILER_INIT} CACHE STRING "C compiler")
ENDIF(NOT CMAKE_C_COMPILER)
MARK_AS_ADVANCED(CMAKE_C_COMPILER)
FIND_PROGRAM(CMAKE_AR NAMES 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)
IF(NOT CMAKE_COMPILER_IS_GNUCC_RUN)
# test to see if the c compiler is gnu
IF(CMAKE_C_FLAGS)
SET(CMAKE_BOOT_C_FLAGS ${CMAKE_C_FLAGS})
ELSE(CMAKE_C_FLAGS)
SET(CMAKE_BOOT_C_FLAGS $ENV{CFLAGS})
ENDIF(CMAKE_C_FLAGS)
EXEC_PROGRAM(${CMAKE_C_COMPILER} ARGS ${CMAKE_BOOT_C_FLAGS} -E "\"${CMAKE_ROOT}/Modules/CMakeTestGNU.c\"" OUTPUT_VARIABLE CMAKE_COMPILER_OUTPUT RETURN_VALUE CMAKE_COMPILER_RETURN)
SET(CMAKE_COMPILER_IS_GNUCC_RUN 1)
IF(NOT CMAKE_COMPILER_RETURN)
IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
SET(CMAKE_COMPILER_IS_GNUCC 1)
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
"Determining if the C compiler is GNU succeeded with "
"the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n")
ELSE("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
FILE(APPEND ${CMAKE_BINARY_DIR}/CMakeOutput.log
"Determining if the C compiler is GNU failed with "
"the following output:\n${CMAKE_COMPILER_OUTPUT}\n\n")
ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_GNU.*" )
IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_MINGW.*" )
SET(CMAKE_COMPILER_IS_MINGW 1)
ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_MINGW.*" )
IF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_CYGWIN.*" )
SET(CMAKE_COMPILER_IS_CYGWIN 1)
ENDIF("${CMAKE_COMPILER_OUTPUT}" MATCHES ".*THIS_IS_CYGWIN.*" )
ENDIF(NOT CMAKE_COMPILER_RETURN)
ENDIF(NOT CMAKE_COMPILER_IS_GNUCC_RUN)
# configure variables set in this file for fast reload later on
CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
${CMAKE_BINARY_DIR}/CMakeCCompiler.cmake IMMEDIATE)
MARK_AS_ADVANCED(CMAKE_AR)
SET(CMAKE_C_COMPILER_ENV_VAR "CC")
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