cmake_modules/CMakeDeterminePascalCompiler.cmake
author koda
Sun, 20 Mar 2016 03:08:51 -0400
changeset 11612 b7d5d75469ee
parent 9517 217eacb69395
permissions -rw-r--r--
Move pixel format conversion from uVideoRec to AVWrapper This has several benefits, being in C-land allows us to better use libav API and avoid mixing memory allocated from Pascal. Also the C code for the conversion loop generated by GCC or Clang is probably more optimized than by Freepascal. Finally it will simplify code in the future if we are going to enable any other pixel format than yuv420p. Change the coefficients to improve color accuracy during conversion.
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# Determine the compiler to use for Pascal programs
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# NOTE, a generator may set CMAKE_Pascal_COMPILER before
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# loading this file to force a compiler.
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# use environment variable Pascal first if defined by user, next use
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# the cmake variable CMAKE_GENERATOR_PASCAL which can be defined by a generator
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# as a default compiler
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# NOTE: on Darwin cmake >= 2.8.11 until cmake <= 2.8.12.1 will add an incompatible
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# -F flag to <FLAGS> so you won't be able to use those versions with this script
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if(NOT CMAKE_Pascal_COMPILER)
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    # prefer the environment variable FPC
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    if($ENV{FPC} MATCHES ".+")
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        get_filename_component(CMAKE_Pascal_COMPILER_INIT $ENV{FPC} PROGRAM PROGRAM_ARGS CMAKE_Pascal_FLAGS_ENV_INIT)
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        if(CMAKE_Pascal_FLAGS_ENV_INIT)
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            set(CMAKE_Pascal_COMPILER_ARG1 "${CMAKE_Pascal_FLAGS_ENV_INIT}" CACHE STRING "First argument to Pascal compiler")
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        endif(CMAKE_Pascal_FLAGS_ENV_INIT)
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        if(EXISTS ${CMAKE_Pascal_COMPILER_INIT})
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        else(EXISTS ${CMAKE_Pascal_COMPILER_INIT})
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            message(FATAL_ERROR "Could not find compiler set in environment variable FPC:\n$ENV{FPC}.")
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        endif(EXISTS ${CMAKE_Pascal_COMPILER_INIT})
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    endif($ENV{FPC} MATCHES ".+")
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    # next try prefer the compiler specified by the generator
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    if(CMAKE_GENERATOR_PASCAL)
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        if(NOT CMAKE_Pascal_COMPILER_INIT)
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            set(CMAKE_Pascal_COMPILER_INIT ${CMAKE_GENERATOR_PASCAL})
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        endif(NOT CMAKE_Pascal_COMPILER_INIT)
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    endif(CMAKE_GENERATOR_PASCAL)
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    # finally list compilers to try
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    if(CMAKE_Pascal_COMPILER_INIT)
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        set(CMAKE_Pascal_COMPILER_LIST ${CMAKE_Pascal_COMPILER_INIT})
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    else(CMAKE_Pascal_COMPILER_INIT)
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        set(CMAKE_Pascal_COMPILER_LIST fpc)
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    endif(CMAKE_Pascal_COMPILER_INIT)
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    # Find the compiler.
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    find_program(CMAKE_Pascal_COMPILER NAMES ${CMAKE_Pascal_COMPILER_LIST} DOC "Pascal compiler")
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    if(CMAKE_Pascal_COMPILER_INIT AND NOT CMAKE_Pascal_COMPILER)
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        set(CMAKE_Pascal_COMPILER "${CMAKE_Pascal_COMPILER_INIT}" CACHE FILEPATH "Pascal compiler" FORCE)
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    endif(CMAKE_Pascal_COMPILER_INIT AND NOT CMAKE_Pascal_COMPILER)
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endif(NOT CMAKE_Pascal_COMPILER)
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mark_as_advanced(CMAKE_Pascal_COMPILER)
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if(NOT CMAKE_Pascal_COMPILER_VERSION)
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    execute_process(COMMAND ${CMAKE_Pascal_COMPILER} -iV
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                    OUTPUT_VARIABLE CMAKE_Pascal_COMPILER_VERSION
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                    OUTPUT_STRIP_TRAILING_WHITESPACE
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                    ) # we assume no error for something so simple
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    set(CMAKE_Pascal_COMPILER_ARG1 "-l- -v0ewn")
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endif(NOT CMAKE_Pascal_COMPILER_VERSION)
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mark_as_advanced(CMAKE_Pascal_COMPILER_VERSION)
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get_filename_component(COMPILER_LOCATION "${CMAKE_Pascal_COMPILER}" PATH)
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# configure variables set in this file for fast reload later on
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if(${CMAKE_VERSION} VERSION_LESS 2.8.10)
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    configure_file(${CMAKE_MODULE_PATH}/CMakePascalCompiler.cmake.in
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                   "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/CMakePascalCompiler.cmake"
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                   IMMEDIATE )
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else(${CMAKE_VERSION} VERSION_LESS 2.8.10)
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    configure_file(${CMAKE_MODULE_PATH}/CMakePascalCompiler.cmake.in
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                  "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/${CMAKE_VERSION}/CMakePascalCompiler.cmake"
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                   IMMEDIATE )
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endif(${CMAKE_VERSION} VERSION_LESS 2.8.10)
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set(CMAKE_Pascal_COMPILER_ENV_VAR "FPC")
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