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6f021d4830
fltk/CMakeLists.txt
Albrecht Schlosser 6f021d4830 CMake: Raise cmake_minimum_required from 3.12 to 3.15 
Remove code that checks CMake versions lower than 3.15
2023-11-15 21:30:12 +01:00

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CMake
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#
# Main CMakeLists.txt to build the FLTK project using CMake (www.cmake.org)
# Originally written by Michael Surette
#
# Copyright 1998-2023 by Bill Spitzak and others.
#
# This library is free software. Distribution and use rights are outlined in
# the file "COPYING" which should have been included with this file. If this
# file is missing or damaged, see the license at:
#
# https://www.fltk.org/COPYING.php
#
# Please see the following page on how to report bugs and issues:
#
# https://www.fltk.org/bugs.php
#
#######################################################################
# Set CMake minimum version first: must be before `project()`
#######################################################################
# Minimum CMake version required by FLTK 1.4
# Note 1: Linking against OBJECT libraries (fluid, test) requires
# at least CMake 3.12.0
# Note 2: Used in fluid since 05/2023,
# used for Windows (MSVC) shared lib builds much earlier
# Note 3: More modern CMake features require 3.13...3.15 (Nov 2023)
cmake_minimum_required (VERSION 3.15.0 FATAL_ERROR)
#######################################################################
# define the FLTK project and version
#######################################################################
project (FLTK VERSION 1.4.0)
#######################################################################
# include macro and function definitions for general usage
#######################################################################
include (CMake/fl_debug_var.cmake)
include (CMake/fl_debug_pkg.cmake)
include (CMake/fl_add_library.cmake)
# right now we don't use compatibility functions
# include (CMake/compatibility.cmake)
if (0)
fl_debug_var (FLTK_VERSION_MAJOR)
fl_debug_var (FLTK_VERSION_MINOR)
fl_debug_var (FLTK_VERSION_PATCH)
fl_debug_var (FLTK_VERSION)
fl_debug_var (CMAKE_VERSION)
endif ()
#######################################################################
# basic setup
#######################################################################
include (CMake/setup.cmake)
#######################################################################
# check for headers, libraries and functions
#######################################################################
include (CMake/resources.cmake)
#######################################################################
# options
#######################################################################
include (CMake/options.cmake)
#######################################################################
# print (debug) several build variables and options
#######################################################################
set (debug_build 0) # set to 1 to show debug info
if (debug_build)
message ("")
message (STATUS "${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt: set 'debug_build' to 0 to disable the following info:")
fl_debug_var (WIN32)
fl_debug_var (MINGW)
fl_debug_var (CYGWIN)
fl_debug_var (MSVC)
fl_debug_var (UNIX)
fl_debug_var (APPLE)
fl_debug_var (CMAKE_BUILD_TYPE)
fl_debug_var (CMAKE_SIZEOF_VOID_P)
fl_debug_var (OPTION_OPTIM)
fl_debug_var (CMAKE_C_FLAGS)
fl_debug_var (CMAKE_CXX_FLAGS)
fl_debug_var (CMAKE_EXE_LINKER_FLAGS)
message (STATUS "${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt: end of debug_build info.")
endif (debug_build)
unset (debug_build)
#######################################################################
# Build a dummy ("empty") Cairo library for backwards compatibility.
# This should be removed some time after 1.4.0 was released, maybe
# in FLTK 1.4.1, 1.4.2, 1.5.0, or whatever the next minor release is.
#######################################################################
if (FLTK_HAVE_CAIRO)
add_subdirectory (cairo)
endif ()
#######################################################################
# build the standard FLTK libraries
#######################################################################
add_subdirectory(src)
#######################################################################
# build fluid
#######################################################################
if (FLTK_BUILD_FLUID)
add_subdirectory (fluid)
endif (FLTK_BUILD_FLUID)
#######################################################################
# build fltk-options
#######################################################################
if (FLTK_BUILD_FLTK_OPTIONS)
add_subdirectory (fltk-options)
endif (FLTK_BUILD_FLTK_OPTIONS)
#######################################################################
# variables shared by export and install
# export.cmake creates configuration files for direct use in a built but uninstalled FLTK
# install.cmake creates these files for an installed FLTK
# these two would only differ in paths, so common variables are set here
#######################################################################
include (CMake/variables.cmake)
#######################################################################
# final config and export
#######################################################################
include (CMake/export.cmake)
configure_file (
${CMAKE_CURRENT_SOURCE_DIR}/fl_config.cmake.in
${CMAKE_CURRENT_BINARY_DIR}/FL/fl_config.h
@ONLY
)
#######################################################################
# options to build test/demo and example programs
#######################################################################
if (FLTK_BUILD_TEST)
add_subdirectory (test)
endif (FLTK_BUILD_TEST)
if (FLTK_BUILD_EXAMPLES)
add_subdirectory (examples)
endif (FLTK_BUILD_EXAMPLES)
#######################################################################
# installation
#######################################################################
include (CMake/install.cmake)
#######################################################################
# Generate Library Export Headers *** EXPERIMENTAL *** WIP ***
#######################################################################
# Enable (1) or disable (0) generation of experimental headers (WIP)
set (GENERATE_EXPORT_HEADERS 0)
if (OPTION_BUILD_SHARED_LIBS AND GENERATE_EXPORT_HEADERS)
include (GenerateExportHeader)
generate_export_header (fltk_SHARED
BASE_NAME fl
EXPORT_FILE_NAME FL/fltk_export.h
STATIC_DEFINE FL_STATIC_LIB
)
if (NOT MSVC)
# Visual Studio builds only one shared lib (DLL)
generate_export_header (fltk_images_SHARED
BASE_NAME fl_images
EXPORT_FILE_NAME FL/fltk_images_export.h
STATIC_DEFINE FL_STATIC_LIB
)
generate_export_header (fltk_forms_SHARED
BASE_NAME fl_forms
EXPORT_FILE_NAME FL/fltk_forms_export.h
STATIC_DEFINE FL_STATIC_LIB
)
generate_export_header (fltk_gl_SHARED
BASE_NAME fl_gl
EXPORT_FILE_NAME FL/fltk_gl_export.h
STATIC_DEFINE FL_STATIC_LIB
)
endif (NOT MSVC)
endif (OPTION_BUILD_SHARED_LIBS AND GENERATE_EXPORT_HEADERS)
#######################################################################
# Output Configuration Summary
#######################################################################
include (FeatureSummary)
message ("")
set (_descr "${PROJECT_NAME} ${FLTK_VERSION} generated by CMake ${CMAKE_VERSION}")
feature_summary (WHAT ALL DESCRIPTION "Configuration Summary for ${_descr} --\n")
message (STATUS "Static libraries will be built in ${CMAKE_CURRENT_BINARY_DIR}/lib")
if (OPTION_BUILD_SHARED_LIBS)
message (STATUS "Shared libraries will be built in ${CMAKE_CURRENT_BINARY_DIR}/lib")
else ()
message (STATUS "Shared libraries will not be built (set OPTION_BUILD_SHARED_LIBS=ON to build)")
endif ()
if (FLTK_BUILD_FLUID)
message (STATUS "FLUID will be built in ${CMAKE_CURRENT_BINARY_DIR}/bin/fluid")
else ()
message (STATUS "FLUID will not be built (set FLTK_BUILD_FLUID=ON to build)")
endif ()
if (FLTK_BUILD_FLTK_OPTIONS)
message (STATUS "fltk-options will be built in ${CMAKE_CURRENT_BINARY_DIR}/bin/fltk-options")
else ()
message (STATUS "fltk-options will not be built (set FLTK_BUILD_FLTK_OPTIONS=ON to build)")
endif ()
if (FLTK_BUILD_TEST)
message (STATUS "Test programs will be built in ${CMAKE_CURRENT_BINARY_DIR}/bin/test")
endif ()
if (FLTK_BUILD_EXAMPLES)
message (STATUS "Example programs will be built in ${CMAKE_CURRENT_BINARY_DIR}/bin/examples")
else ()
message (STATUS "Example programs will not be built (set FLTK_BUILD_EXAMPLES=ON to build)")
endif ()
if (FLTK_USE_BUILTIN_JPEG)
message (STATUS "Image Libraries : JPEG = Builtin")
else ()
message (STATUS "Image Libraries : JPEG = System")
endif ()
if (FLTK_USE_BUILTIN_PNG)
message (STATUS " : PNG = Builtin")
else ()
message (STATUS " : PNG = System")
endif ()
if (FLTK_USE_BUILTIN_ZLIB)
message (STATUS " : ZLIB = Builtin")
else ()
message (STATUS " : ZLIB = System")
endif ()
if (UNIX AND NOT (APPLE AND NOT OPTION_APPLE_X11))
if (OPTION_USE_WAYLAND)
message (STATUS "Use Wayland : Yes (if available at run-time)")
else ()
message (STATUS "Use Wayland : No (therefore, X11 is used)")
endif ()
if (FLTK_USE_CAIRO)
message (STATUS "All drawing uses Cairo : Yes")
else ()
message (STATUS "All drawing uses Cairo : No")
endif ()
if (USE_PANGO)
message (STATUS "Use Pango : Yes")
else (USE_PANGO)
message (STATUS "Use Pango : No")
if (USE_XFT)
message (STATUS "Use Xft : Yes")
else ()
message (STATUS "Use Xft : No")
endif (USE_XFT)
endif (USE_PANGO)
endif (UNIX AND NOT (APPLE AND NOT OPTION_APPLE_X11))
if (FLTK_HAVE_CAIROEXT)
message (STATUS "Fl_Cairo_Window support : Yes (extended)")
elseif (FLTK_HAVE_CAIRO)
message (STATUS "Fl_Cairo_Window support : Yes (standard)")
else ()
message (STATUS "Fl_Cairo_Window support : No")
endif ()
if (FLTK_USE_STD)
message (STATUS "Use std:: : Yes")
else ()
message (STATUS "Use std:: : No")
endif ()
message ("")
message (STATUS "End of Configuration Summary --\n")
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