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r25958:603d75b53498 2.2 KiB text/x-cmake Show Annotation Show as Raw Download as Raw

Patric Stout

Doc: update multiplayer documentation with latest changes (#9552)

Although several places were fixed during the PR making the change,
not all made it in this document.

While at it, removed all kinds of Markdown warnings by an excessive
usage of spacebar in this document.

# Add a file to be compiled.
#
# add_files([file1 ...] CONDITION condition [condition ...])
#
# CONDITION is a complete statement that can be evaluated with if().
# If it evaluates true, the source files will be added; otherwise not.
# For example: ADD_IF SDL_FOUND AND Allegro_FOUND
#
function(add_files)
    cmake_parse_arguments(PARAM "" "" "CONDITION" ${ARGN})
    set(PARAM_FILES "${PARAM_UNPARSED_ARGUMENTS}")

    if(PARAM_CONDITION)
        if(NOT (${PARAM_CONDITION}))
            return()
        endif()
    endif()

    foreach(FILE IN LISTS PARAM_FILES)
        target_sources(openttd PRIVATE ${CMAKE_CURRENT_SOURCE_DIR}/${FILE})
    endforeach()
endfunction()

# This function works around an 'issue' with CMake, where
# set_source_files_properties() only works in the scope of the file. We want
# to set properties for the source file on a more global level. To solve this,
# this function records the flags you want, and a macro adds them in the root
# CMakeLists.txt.
# See this URL for more information on the issue:
# http://cmake.3232098.n2.nabble.com/scope-of-set-source-files-properties-td4766111.html
#
# set_compile_flags([file1 ...] COMPILE_FLAGS cflag [cflag ...])
#
function(set_compile_flags)
    cmake_parse_arguments(PARAM "" "" "COMPILE_FLAGS" ${ARGN})
    set(PARAM_FILES "${PARAM_UNPARSED_ARGUMENTS}")

    get_property(SOURCE_PROPERTIES GLOBAL PROPERTY source_properties)

    foreach(FILE IN LISTS PARAM_FILES)
        list(APPEND SOURCE_PROPERTIES "${CMAKE_CURRENT_SOURCE_DIR}/${FILE}::${PARAM_COMPILE_FLAGS}")
    endforeach()

    set_property(GLOBAL PROPERTY source_properties "${SOURCE_PROPERTIES}")
endfunction()

# Call this macro in the same CMakeLists.txt and after add_executable().
# This makes sure all the COMPILE_FLAGS of set_compile_flags() are set
# correctly.
#
# process_compile_flags()
#
function(process_compile_flags)
    get_property(SOURCE_PROPERTIES GLOBAL PROPERTY source_properties)

    foreach(ENTRY ${SOURCE_PROPERTIES})
        string(REPLACE "::" ";" ENTRY "${ENTRY}")
        list(GET ENTRY 0 FILE)
        list(GET ENTRY 1 PROPERTIES)

        set_source_files_properties(${FILE} PROPERTIES COMPILE_FLAGS ${PROPERTIES})
    endforeach()
endfunction()