# Determine the compiler to use for Pascal programs

# NOTE, a generator may set CMAKE_Pascal_COMPILER before

# loading this file to force a compiler.

# use environment variable Pascal first if defined by user, next use

# the cmake variable CMAKE_GENERATOR_PASCAL which can be defined by a generator

# as a default compiler

if(NOT CMAKE_Pascal_COMPILER)

    # prefer the environment variable FPC

    if($ENV{FPC} MATCHES ".+")

        get_filename_component(CMAKE_Pascal_COMPILER_INIT $ENV{FPC} PROGRAM PROGRAM_ARGS CMAKE_Pascal_FLAGS_ENV_INIT)

        if(CMAKE_Pascal_FLAGS_ENV_INIT)

            set(CMAKE_Pascal_COMPILER_ARG1 "${CMAKE_Pascal_FLAGS_ENV_INIT}" CACHE STRING "First argument to Pascal compiler")

        endif(CMAKE_Pascal_FLAGS_ENV_INIT)

        if(EXISTS ${CMAKE_Pascal_COMPILER_INIT})

        else(EXISTS ${CMAKE_Pascal_COMPILER_INIT})

            message(FATAL_ERROR "Could not find compiler set in environment variable FPC:\n$ENV{FPC}.")

        endif(EXISTS ${CMAKE_Pascal_COMPILER_INIT})

    endif($ENV{FPC} MATCHES ".+")

    # next try prefer the compiler specified by the generator

    if(CMAKE_GENERATOR_PASCAL)

        if(NOT CMAKE_Pascal_COMPILER_INIT)

            set(CMAKE_Pascal_COMPILER_INIT ${CMAKE_GENERATOR_PASCAL})

        endif(NOT CMAKE_Pascal_COMPILER_INIT)

    endif(CMAKE_GENERATOR_PASCAL)

    # finally list compilers to try

    if(CMAKE_Pascal_COMPILER_INIT)

        set(CMAKE_Pascal_COMPILER_LIST ${CMAKE_Pascal_COMPILER_INIT})

    else(CMAKE_Pascal_COMPILER_INIT)

        set(CMAKE_Pascal_COMPILER_LIST fpc)

    endif(CMAKE_Pascal_COMPILER_INIT)

    # Find the compiler.

    find_program(CMAKE_Pascal_COMPILER NAMES ${CMAKE_Pascal_COMPILER_LIST} DOC "Pascal compiler")

    if(CMAKE_Pascal_COMPILER_INIT AND NOT CMAKE_Pascal_COMPILER)

        set(CMAKE_Pascal_COMPILER "${CMAKE_Pascal_COMPILER_INIT}" CACHE FILEPATH "Pascal compiler" FORCE)

    endif(CMAKE_Pascal_COMPILER_INIT AND NOT CMAKE_Pascal_COMPILER)

endif(NOT CMAKE_Pascal_COMPILER)

mark_as_advanced(CMAKE_Pascal_COMPILER)

if(NOT CMAKE_Pascal_COMPILER_VERSION)

    execute_process(COMMAND ${CMAKE_Pascal_COMPILER} -iV

                    OUTPUT_VARIABLE CMAKE_Pascal_COMPILER_VERSION

                    OUTPUT_STRIP_TRAILING_WHITESPACE

                    ) # we assume no error for something so simple

endif(NOT CMAKE_Pascal_COMPILER_VERSION)

mark_as_advanced(CMAKE_Pascal_COMPILER_VERSION)

get_filename_component(COMPILER_LOCATION "${CMAKE_Pascal_COMPILER}" PATH)

# configure variables set in this file for fast reload later on

if(${CMAKE_VERSION} VERSION_LESS 2.8.10)

    configure_file(${CMAKE_MODULE_PATH}/CMakePascalCompiler.cmake.in

                   "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/CMakePascalCompiler.cmake"

                   IMMEDIATE )

else(${CMAKE_VERSION} VERSION_LESS 2.8.10)

    configure_file(${CMAKE_MODULE_PATH}/CMakePascalCompiler.cmake.in

                  "${CMAKE_BINARY_DIR}/${CMAKE_FILES_DIRECTORY}/${CMAKE_VERSION}/CMakePascalCompiler.cmake"

                   IMMEDIATE )

endif(${CMAKE_VERSION} VERSION_LESS 2.8.10)

set(CMAKE_Pascal_COMPILER_ENV_VAR "FPC")