90 lines
3.4 KiB
CMake
90 lines
3.4 KiB
CMake
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# determine the compiler to use for C programs
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# NOTE, a generator may set CMAKE_C_COMPILER before
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# loading this file to force a compiler.
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# use environment variable CCC first if defined by user, next use
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# the cmake variable CMAKE_GENERATOR_CC which can be defined by a generator
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# as a default compiler
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IF(NOT CMAKE_C_COMPILER)
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SET(CMAKE_CXX_COMPILER_INIT NOTFOUND)
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# prefer the environment variable CC
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IF($ENV{CC} MATCHES ".+")
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GET_FILENAME_COMPONENT(CMAKE_C_COMPILER_INIT $ENV{CC} PROGRAM PROGRAM_ARGS CMAKE_C_FLAGS_ENV_INIT)
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IF(CMAKE_C_FLAGS_ENV_INIT)
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SET(CMAKE_C_COMPILER_ARG1 "${CMAKE_C_FLAGS_ENV_INIT}" CACHE STRING "First argument to C compiler")
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ENDIF(CMAKE_C_FLAGS_ENV_INIT)
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IF(EXISTS ${CMAKE_C_COMPILER_INIT})
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ELSE(EXISTS ${CMAKE_C_COMPILER_INIT})
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MESSAGE(FATAL_ERROR "Could not find compiler set in environment variable CC:\n$ENV{CC}.")
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ENDIF(EXISTS ${CMAKE_C_COMPILER_INIT})
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ENDIF($ENV{CC} MATCHES ".+")
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# next try prefer the compiler specified by the generator
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IF(CMAKE_GENERATOR_CC)
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IF(NOT CMAKE_C_COMPILER_INIT)
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SET(CMAKE_C_COMPILER_INIT ${CMAKE_GENERATOR_CC})
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ENDIF(NOT CMAKE_C_COMPILER_INIT)
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ENDIF(CMAKE_GENERATOR_CC)
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# finally list compilers to try
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IF(CMAKE_C_COMPILER_INIT)
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SET(CMAKE_C_COMPILER_LIST ${CMAKE_C_COMPILER_INIT})
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ELSE(CMAKE_C_COMPILER_INIT)
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SET(CMAKE_C_COMPILER_LIST gcc cc cl bcc xlc)
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ENDIF(CMAKE_C_COMPILER_INIT)
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# Find the compiler.
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FIND_PROGRAM(CMAKE_C_COMPILER NAMES ${CMAKE_C_COMPILER_LIST} DOC "C compiler")
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IF(CMAKE_C_COMPILER_INIT AND NOT CMAKE_C_COMPILER)
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SET(CMAKE_C_COMPILER "${CMAKE_C_COMPILER_INIT}" CACHE FILEPATH "C compiler" FORCE)
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ENDIF(CMAKE_C_COMPILER_INIT AND NOT CMAKE_C_COMPILER)
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ENDIF(NOT CMAKE_C_COMPILER)
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MARK_AS_ADVANCED(CMAKE_C_COMPILER)
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GET_FILENAME_COMPONENT(COMPILER_LOCATION "${CMAKE_C_COMPILER}"
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PATH)
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FIND_PROGRAM(CMAKE_AR NAMES ar PATHS ${COMPILER_LOCATION} )
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FIND_PROGRAM(CMAKE_RANLIB NAMES ranlib)
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IF(NOT CMAKE_RANLIB)
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SET(CMAKE_RANLIB : CACHE INTERNAL "noop for ranlib")
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ENDIF(NOT CMAKE_RANLIB)
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MARK_AS_ADVANCED(CMAKE_RANLIB)
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# Build a small source file to identify the compiler.
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IF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
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SET(CMAKE_C_COMPILER_ID_RUN 1)
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SET(CMAKE_C_PLATFORM_ID "Windows")
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# TODO: Set the compiler id. It is probably MSVC but
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# the user may be using an integrated Intel compiler.
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# SET(CMAKE_C_COMPILER_ID "MSVC")
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ENDIF(${CMAKE_GENERATOR} MATCHES "Visual Studio")
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IF(NOT CMAKE_C_COMPILER_ID_RUN)
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SET(CMAKE_C_COMPILER_ID_RUN 1)
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# Try to identify the compiler.
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SET(CMAKE_C_COMPILER_ID)
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INCLUDE(${CMAKE_ROOT}/Modules/CMakeDetermineCompilerId.cmake)
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CMAKE_DETERMINE_COMPILER_ID(C CFLAGS ${CMAKE_ROOT}/Modules/CMakeCCompilerId.c)
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# Set old compiler and platform id variables.
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IF("${CMAKE_C_COMPILER_ID}" MATCHES "GNU")
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SET(CMAKE_COMPILER_IS_GNUCC 1)
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ENDIF("${CMAKE_C_COMPILER_ID}" MATCHES "GNU")
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IF("${CMAKE_C_PLATFORM_ID}" MATCHES "MinGW")
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SET(CMAKE_COMPILER_IS_MINGW 1)
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ELSEIF("${CMAKE_C_PLATFORM_ID}" MATCHES "Cygwin")
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SET(CMAKE_COMPILER_IS_CYGWIN 1)
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ENDIF("${CMAKE_C_PLATFORM_ID}" MATCHES "MinGW")
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ENDIF(NOT CMAKE_C_COMPILER_ID_RUN)
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# configure variables set in this file for fast reload later on
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CONFIGURE_FILE(${CMAKE_ROOT}/Modules/CMakeCCompiler.cmake.in
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"${CMAKE_PLATFORM_ROOT_BIN}/CMakeCCompiler.cmake" IMMEDIATE)
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MARK_AS_ADVANCED(CMAKE_AR)
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SET(CMAKE_C_COMPILER_ENV_VAR "CC")
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