410a01c6db
CMake/compatibility.cmake: define functions and macros to be used if a particular CMake functionality requires a higher CMake version than FLTK's minimum CMake version, see 'cmake_minimum_required(...)' in the root CMakeLists.txt. Note: target_link_directories() is available since CMake 3.13
75 lines
2.7 KiB
CMake
75 lines
2.7 KiB
CMake
#
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# CMake compatibility functions and macros for the Fast Light Tool Kit (FLTK)
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#
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# Copyright 1998-2021 by Bill Spitzak and others.
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#
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# This library is free software. Distribution and use rights are outlined in
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# the file "COPYING" which should have been included with this file. If this
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# file is missing or damaged, see the license at:
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#
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# https://www.fltk.org/COPYING.php
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#
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# Please see the following page on how to report bugs and issues:
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#
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# https://www.fltk.org/bugs.php
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#
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################################################################################
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#
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# The functions (and macros) in this file are defined to simplify CMake
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# code that uses features not available in all supported CMake versions.
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# Functions should be preferred (rather than macros) because functions
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# have their own variable scope.
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#
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# The function must apply a workaround for older versions or not add code
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# at all if there is no suitable workaround.
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#
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# The functions included here may be removed (with according changes of the
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# calling code) or the workaround code may be removed from the implementation
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# after cmake_minimum_required() has been raised to a version number greater
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# than or equal to the required version.
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#
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# Current cmake_minimum_required() version: see <fltk-root>/CMakeLists.txt
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#
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################################################################################
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################################################################################
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#
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# function fl_target_link_directories - add link directories to target
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#
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# Requires CMake version: 3.13
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# https://cmake.org/cmake/help/latest/command/target_link_directories.html
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#
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# Input:
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#
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# - TARGET: target to add link directories to, e.g. fluid
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#
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# - SCOPE: one of <INTERFACE|PUBLIC|PRIVATE> (see CMake docs)
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#
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# - DIRS: quoted list of link directories (separated by ';')
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#
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# The 'DIRS' argument takes a standard CMake list of directories, i.e. the
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# individual members must be separated by ';'. The list may be empty ("").
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# If more than one directory is to be added or if the list of directories
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# can be empty it *must* be quoted. This function may be called more than
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# once. Each invocation adds zero, one, or more directories.
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#
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# Example:
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#
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# fl_target_link_directories (fluid PRIVATE "${PKG_CAIRO_LIBRARY_DIRS}")
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#
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# In this example 'PKG_CAIRO_LIBRARY_DIRS' is platform dependent and
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# can be an empty list.
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#
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################################################################################
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function (fl_target_link_directories TARGET SCOPE DIRS)
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if (CMAKE_VERSION VERSION_LESS "3.13")
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link_directories (${DIRS})
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else ()
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target_link_directories (${TARGET} ${SCOPE} ${DIRS})
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endif ()
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endfunction () # fl_target_link_directories()
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