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fltk/CMake/options.cmake
Albrecht Schlosser 88129db051 Improve CMake's Cairo detection and issue error message... 
... if Cairo was requested (OPTION_CAIRO or OPTION_CAIROEXT) but
Cairo was not found. CMake generation is terminated with a fatal error.

The user has two choices: install Cairo libs and headers or disable
OPTION_CAIRO and OPTION_CAIROEXT.
2018-12-20 19:12:50 +01:00

592 lines
19 KiB
CMake
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#
# "$Id$"
#
# Main CMakeLists.txt to build the FLTK project using CMake (www.cmake.org)
# Written by Michael Surette
#
# Copyright 1998-2018 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:
#
# http://www.fltk.org/COPYING.php
#
# Please report all bugs and problems on the following page:
#
# http://www.fltk.org/str.php
#
set (DEBUG_OPTIONS_CMAKE 0)
if (DEBUG_OPTIONS_CMAKE)
message (STATUS "[** options.cmake **]")
fl_debug_var (WIN32)
fl_debug_var (FLTK_LDLIBS)
endif (DEBUG_OPTIONS_CMAKE)
#######################################################################
# *Temporary* option to modify header file searches
#######################################################################
# Note: The old, deprecated behavior (ON) was to use find_file() for
# header searches, the new behavior (ON) is to use check_include_files()
# which seems to be more reliable but more difficult to set up and
# slower because it uses a compilation test. Default is "new" (OFF).
# This option should be removed as soon as the new search strategy
# is considered stable.
# Currently used only in resources.cmake.
#######################################################################
option(USE_FIND_FILE
"Deprecated: use find_file() for header searches. Should be OFF."
OFF
)
mark_as_advanced(USE_FIND_FILE)
#######################################################################
# options
#######################################################################
set(OPTION_OPTIM ""
CACHE STRING
"custom optimization flags"
)
add_definitions(${OPTION_OPTIM})
#######################################################################
set(OPTION_ARCHFLAGS ""
CACHE STRING
"custom architecture flags"
)
add_definitions(${OPTION_ARCHFLAGS})
#######################################################################
set(OPTION_ABI_VERSION ""
CACHE STRING
"FLTK ABI Version FL_ABI_VERSION: 1xxyy for 1.x.y (xx,yy with leading zero)"
)
set(FL_ABI_VERSION ${OPTION_ABI_VERSION})
#######################################################################
#######################################################################
if (UNIX)
option(OPTION_CREATE_LINKS "create backwards compatibility links" OFF)
endif (UNIX)
#######################################################################
## Add a TEMPORARY OPTION to enable high-DPI support under Windows.
## May be removed once high-DPI support under Windows is complete.
#######################################################################
if (WIN32)
option(OPTION_HIDPI "build with experimental high-DPI support" OFF)
if (OPTION_HIDPI)
add_definitions("-DFLTK_HIDPI_SUPPORT")
endif (OPTION_HIDPI)
endif (WIN32)
#######################################################################
if (APPLE)
option (OPTION_APPLE_X11 "use X11" OFF)
option (OPTION_APPLE_SDL "use SDL" OFF)
endif (APPLE)
# find X11 libraries and headers
set (PATH_TO_XLIBS)
if ((NOT APPLE OR OPTION_APPLE_X11) AND NOT WIN32)
include (FindX11)
if (X11_FOUND)
set (USE_X11 1)
list (APPEND FLTK_LDLIBS -lX11)
if (X11_Xext_FOUND)
list (APPEND FLTK_LDLIBS -lXext)
endif (X11_Xext_FOUND)
get_filename_component (PATH_TO_XLIBS ${X11_X11_LIB} PATH)
endif (X11_FOUND)
endif ((NOT APPLE OR OPTION_APPLE_X11) AND NOT WIN32)
if (OPTION_APPLE_X11)
include_directories (AFTER SYSTEM /opt/X11/include/freetype2)
if (PATH_TO_XLIBS)
set (LDFLAGS "-L${PATH_TO_XLIBS} ${LDFLAGS}")
endif (PATH_TO_XLIBS)
if (X11_INCLUDE_DIR)
list (APPEND FLTK_CFLAGS "-I${X11_INCLUDE_DIR}")
endif (X11_INCLUDE_DIR)
endif (OPTION_APPLE_X11)
if (OPTION_APPLE_SDL)
find_package (SDL2 REQUIRED)
if (SDL2_FOUND)
set (USE_SDL 1)
list (APPEND FLTK_LDLIBS SDL2_LIBRARY)
endif (SDL2_FOUND)
endif (OPTION_APPLE_SDL)
#######################################################################
option(OPTION_USE_POLL "use poll if available" OFF)
mark_as_advanced(OPTION_USE_POLL)
if(OPTION_USE_POLL)
CHECK_FUNCTION_EXISTS(poll USE_POLL)
endif(OPTION_USE_POLL)
#######################################################################
option(OPTION_BUILD_SHARED_LIBS
"Build shared libraries(in addition to static libraries)"
OFF
)
#######################################################################
option(OPTION_BUILD_EXAMPLES "build example programs" ON)
option(OPTION_PRINT_SUPPORT "allow print support" ON)
option(OPTION_FILESYSTEM_SUPPORT "allow file system support" ON)
#######################################################################
if(DOXYGEN_FOUND)
option(OPTION_BUILD_HTML_DOCUMENTATION "build html docs" OFF)
option(OPTION_INSTALL_HTML_DOCUMENTATION "install html docs" OFF)
if(LATEX_FOUND)
option(OPTION_BUILD_PDF_DOCUMENTATION "build pdf docs" OFF)
option(OPTION_INSTALL_PDF_DOCUMENTATION "install pdf docs" OFF)
endif(LATEX_FOUND)
endif(DOXYGEN_FOUND)
if(OPTION_BUILD_HTML_DOCUMENTATION OR OPTION_BUILD_PDF_DOCUMENTATION)
add_subdirectory(documentation)
endif(OPTION_BUILD_HTML_DOCUMENTATION OR OPTION_BUILD_PDF_DOCUMENTATION)
#######################################################################
include(FindPkgConfig)
option(OPTION_CAIRO "use lib Cairo" OFF)
option(OPTION_CAIROEXT
"use FLTK code instrumentation for Cairo extended use" OFF
)
if ((OPTION_CAIRO OR OPTION_CAIROEXT) AND LIB_CAIRO)
pkg_search_module(PKG_CAIRO cairo)
endif ((OPTION_CAIRO OR OPTION_CAIROEXT) AND LIB_CAIRO)
if (PKG_CAIRO_FOUND)
set (FLTK_HAVE_CAIRO 1)
add_subdirectory(cairo)
list(APPEND FLTK_LDLIBS -lcairo -lpixman-1)
include_directories(${PKG_CAIRO_INCLUDE_DIRS})
string(REPLACE ";" " " CAIROFLAGS "${PKG_CAIRO_CFLAGS}")
endif (PKG_CAIRO_FOUND)
if (LIB_CAIRO AND OPTION_CAIROEXT AND PKG_CAIRO_FOUND)
set(FLTK_USE_CAIRO 1)
set(FLTK_CAIRO_FOUND TRUE)
else()
set(FLTK_CAIRO_FOUND FALSE)
endif (LIB_CAIRO AND OPTION_CAIROEXT AND PKG_CAIRO_FOUND)
if ((OPTION_CAIRO OR OPTION_CAIROEXT) AND NOT PKG_CAIRO_FOUND)
message(STATUS "*** Cairo was requested but not found - please install Cairo ...")
message(STATUS "*** or disable options OPTION_CAIRO and OPTION_CAIRO_EXT")
message(FATAL_ERROR "*** Terminating: missing Cairo libs or headers")
endif ((OPTION_CAIRO OR OPTION_CAIROEXT) AND NOT PKG_CAIRO_FOUND)
#######################################################################
option(OPTION_USE_NANOSVG "support SVG images" ON)
if(OPTION_USE_NANOSVG)
set(FLTK_USE_NANOSVG 1)
endif(OPTION_USE_NANOSVG)
#######################################################################
set(HAVE_GL LIB_GL OR LIB_MesaGL)
if(HAVE_GL)
option(OPTION_USE_GL "use OpenGL" ON)
endif(HAVE_GL)
if(OPTION_USE_GL)
if(OPTION_APPLE_X11)
set(OPENGL_FOUND TRUE)
set(OPENGL_LIBRARIES -L${PATH_TO_XLIBS} -lGLU -lGL)
set(HAVE_GL_GLU_H /opt/X11/include/GL/glu.h)
elseif(OPTION_APPLE_SDL)
set(OPENGL_FOUND FALSE)
else()
include(FindOpenGL)
if(APPLE)
set(HAVE_GL_GLU_H ${HAVE_OPENGL_GLU_H})
endif(APPLE)
endif(OPTION_APPLE_X11)
else ()
set(OPENGL_FOUND FALSE)
endif(OPTION_USE_GL)
if (OPENGL_FOUND)
set (CMAKE_REQUIRED_INCLUDES ${OPENGL_INCLUDE_DIR}/GL)
# Set GLLIBS (used in fltk-config).
# We should probably deduct this from OPENGL_LIBRARIES but it turned
# out to be difficult since FindOpenGL seems to return different
# syntax depending on the platform (and maybe also CMake version).
# Hence we use the following code...
if (WIN32)
set (GLLIBS "-lglu32 -lopengl32")
elseif (APPLE AND NOT OPTION_APPLE_X11)
set (GLLIBS "-framework OpenGL")
else ()
set (GLLIBS "-lGLU -lGL")
endif (WIN32)
# check if function glXGetProcAddressARB exists
set (TEMP_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES})
set (CMAKE_REQUIRED_LIBRARIES ${OPENGL_LIBRARIES})
CHECK_FUNCTION_EXISTS (glXGetProcAddressARB HAVE_GLXGETPROCADDRESSARB)
set (CMAKE_REQUIRED_LIBRARIES ${TEMP_REQUIRED_LIBRARIES})
unset (TEMP_REQUIRED_LIBRARIES)
set (FLTK_GL_FOUND TRUE)
else ()
set (FLTK_GL_FOUND FALSE)
set (GLLIBS)
endif (OPENGL_FOUND)
#######################################################################
option (OPTION_LARGE_FILE "enable large file support" ON)
if (OPTION_LARGE_FILE)
if (NOT MSVC)
add_definitions (-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64)
list (APPEND FLTK_CFLAGS -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64)
endif (NOT MSVC)
endif (OPTION_LARGE_FILE)
#######################################################################
# Create an option whether we want to check for pthreads.
# We must not do it on Windows unless we run under Cygwin, since we
# always use native threads on Windows (even if libpthread is available).
# Note: HAVE_PTHREAD_H has already been determined in resources.cmake
# before this file is included (or set to 0 for WIN32).
if (WIN32 AND NOT CYGWIN)
# set(HAVE_PTHREAD_H 0) # (see resources.cmake)
set(OPTION_USE_THREADS FALSE)
else ()
option(OPTION_USE_THREADS "use multi-threading with pthreads" ON)
endif (WIN32 AND NOT CYGWIN)
# initialize more variables
set(USE_THREADS 0)
set(HAVE_PTHREAD 0)
set(FLTK_PTHREADS_FOUND FALSE)
if (OPTION_USE_THREADS)
include(FindThreads)
if (CMAKE_HAVE_THREADS_LIBRARY)
add_definitions("-D_THREAD_SAFE -D_REENTRANT")
set(USE_THREADS 1)
set(FLTK_THREADS_FOUND TRUE)
endif (CMAKE_HAVE_THREADS_LIBRARY)
if (CMAKE_USE_PTHREADS_INIT AND NOT WIN32)
set(HAVE_PTHREAD 1)
if (NOT APPLE)
set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")
endif (NOT APPLE)
list(APPEND FLTK_LDLIBS -lpthread)
list(APPEND FLTK_CFLAGS -D_THREAD_SAFE -D_REENTRANT)
set(FLTK_PTHREADS_FOUND TRUE)
else()
set(HAVE_PTHREAD 0)
set(HAVE_PTHREAD_H 0)
set(FLTK_PTHREADS_FOUND FALSE)
endif(CMAKE_USE_PTHREADS_INIT AND NOT WIN32)
else (OPTION_USE_THREADS)
set(HAVE_PTHREAD_H 0)
endif (OPTION_USE_THREADS)
set (debug_threads 0) # set to 1 to show debug info
if (debug_threads)
message ("")
message (STATUS "options.cmake: set debug_threads to 0 to disable the following info:")
fl_debug_var(OPTION_USE_THREADS)
fl_debug_var(HAVE_PTHREAD)
fl_debug_var(HAVE_PTHREAD_H)
fl_debug_var(FLTK_THREADS_FOUND)
fl_debug_var(CMAKE_EXE_LINKER_FLAGS)
message (STATUS "options.cmake: end of debug_threads info.")
endif (debug_threads)
unset (debug_threads)
#######################################################################
option (OPTION_USE_SYSTEM_ZLIB "use system zlib" ON)
if (OPTION_USE_SYSTEM_ZLIB)
include (FindZLIB)
endif (OPTION_USE_SYSTEM_ZLIB)
if (ZLIB_FOUND)
set (FLTK_ZLIB_LIBRARIES ${ZLIB_LIBRARIES})
include_directories (${ZLIB_INCLUDE_DIRS})
set (FLTK_BUILTIN_ZLIB_FOUND FALSE)
else()
if (OPTION_USE_SYSTEM_ZLIB)
message(STATUS "\ncannot find system zlib library - using built-in\n")
endif (OPTION_USE_SYSTEM_ZLIB)
add_subdirectory (zlib)
set (FLTK_ZLIB_LIBRARIES fltk_z)
set (ZLIB_INCLUDE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/zlib)
include_directories (${CMAKE_CURRENT_SOURCE_DIR}/zlib)
set (FLTK_BUILTIN_ZLIB_FOUND TRUE)
endif (ZLIB_FOUND)
set (HAVE_LIBZ 1)
#######################################################################
option (OPTION_USE_SYSTEM_LIBJPEG "use system libjpeg" ON)
if (OPTION_USE_SYSTEM_LIBJPEG)
include (FindJPEG)
endif (OPTION_USE_SYSTEM_LIBJPEG)
if (JPEG_FOUND)
set(FLTK_JPEG_LIBRARIES ${JPEG_LIBRARIES})
include_directories(${JPEG_INCLUDE_DIR})
set(FLTK_BUILTIN_JPEG_FOUND FALSE)
else ()
if (OPTION_USE_SYSTEM_LIBJPEG)
message (STATUS "\ncannot find system jpeg library - using built-in\n")
endif (OPTION_USE_SYSTEM_LIBJPEG)
add_subdirectory (jpeg)
set (FLTK_JPEG_LIBRARIES fltk_jpeg)
include_directories (${CMAKE_CURRENT_SOURCE_DIR}/jpeg)
set (FLTK_BUILTIN_JPEG_FOUND TRUE)
endif (JPEG_FOUND)
set (HAVE_LIBJPEG 1)
#######################################################################
option (OPTION_USE_SYSTEM_LIBPNG "use system libpng" ON)
if (OPTION_USE_SYSTEM_LIBPNG)
include (FindPNG)
endif (OPTION_USE_SYSTEM_LIBPNG)
if (PNG_FOUND)
set (FLTK_PNG_LIBRARIES ${PNG_LIBRARIES})
include_directories (${PNG_INCLUDE_DIR})
add_definitions (${PNG_DEFINITIONS})
set (FLTK_BUILTIN_PNG_FOUND FALSE)
else()
if (OPTION_USE_SYSTEM_LIBPNG)
message (STATUS "\ncannot find system png library - using built-in\n")
endif (OPTION_USE_SYSTEM_LIBPNG)
add_subdirectory (png)
set (FLTK_PNG_LIBRARIES fltk_png)
set (HAVE_PNG_H 1)
set (HAVE_PNG_GET_VALID 1)
set (HAVE_PNG_SET_TRNS_TO_ALPHA 1)
include_directories (${CMAKE_CURRENT_SOURCE_DIR}/png)
set (FLTK_BUILTIN_PNG_FOUND TRUE)
endif (PNG_FOUND)
set (HAVE_LIBPNG 1)
#######################################################################
if(X11_Xinerama_FOUND)
option(OPTION_USE_XINERAMA "use lib Xinerama" ON)
endif(X11_Xinerama_FOUND)
if(OPTION_USE_XINERAMA)
set(HAVE_XINERAMA ${X11_Xinerama_FOUND})
include_directories(${X11_Xinerama_INCLUDE_PATH})
list(APPEND FLTK_LDLIBS -lXinerama)
set(FLTK_XINERAMA_FOUND TRUE)
else()
set(FLTK_XINERAMA_FOUND FALSE)
endif(OPTION_USE_XINERAMA)
#######################################################################
if(X11_Xfixes_FOUND)
option(OPTION_USE_XFIXES "use lib Xfixes" ON)
endif(X11_Xfixes_FOUND)
if(OPTION_USE_XFIXES)
set(HAVE_XFIXES ${X11_Xfixes_FOUND})
include_directories(${X11_Xfixes_INCLUDE_PATH})
list(APPEND FLTK_LDLIBS -lXfixes)
set(FLTK_XFIXES_FOUND TRUE)
else()
set(FLTK_XFIXES_FOUND FALSE)
endif(OPTION_USE_XFIXES)
#######################################################################
if(X11_Xcursor_FOUND)
option(OPTION_USE_XCURSOR "use lib Xcursor" ON)
endif(X11_Xcursor_FOUND)
if(OPTION_USE_XCURSOR)
set(HAVE_XCURSOR ${X11_Xcursor_FOUND})
include_directories(${X11_Xcursor_INCLUDE_PATH})
list(APPEND FLTK_LDLIBS -lXcursor)
set(FLTK_XCURSOR_FOUND TRUE)
else()
set(FLTK_XCURSOR_FOUND FALSE)
endif(OPTION_USE_XCURSOR)
#######################################################################
if(X11_Xft_FOUND)
option(OPTION_USE_XFT "use lib Xft" ON)
option(OPTION_USE_PANGO "use lib Pango" OFF)
endif(X11_Xft_FOUND)
# test option compatibility: Pango requires Xft
if (OPTION_USE_PANGO)
if (NOT X11_Xft_FOUND)
message(STATUS "Pango requires Xft but Xft library or headers could not be found.")
message(STATUS "Please install Xft development files and try again or disable OPTION_USE_PANGO.")
message(FATAL_ERROR "*** Aborting ***")
else ()
if (NOT OPTION_USE_XFT)
message(STATUS "Pango requires Xft but usage of Xft was disabled.")
message(STATUS "Please enable OPTION_USE_XFT and try again or disable OPTION_USE_PANGO.")
message(FATAL_ERROR "*** Aborting ***")
endif (NOT OPTION_USE_XFT)
endif (NOT X11_Xft_FOUND)
endif (OPTION_USE_PANGO)
#######################################################################
if(X11_Xft_FOUND AND OPTION_USE_PANGO)
#this covers Debian, Ubuntu, FreeBSD, NetBSD, Darwin
if(APPLE AND OPTION_APPLE_X11)
list(APPEND CMAKE_INCLUDE_PATH /sw/include)
list(APPEND CMAKE_LIBRARY_PATH /sw/lib)
endif(APPLE AND OPTION_APPLE_X11)
find_file(HAVE_PANGO_H pango-1.0/pango/pango.h ${CMAKE_INCLUDE_PATH})
find_file(HAVE_PANGOXFT_H pango-1.0/pango/pangoxft.h ${CMAKE_INCLUDE_PATH})
if(HAVE_PANGO_H AND HAVE_PANGOXFT_H)
find_library(HAVE_LIB_PANGO pango-1.0 ${CMAKE_LIBRARY_PATH})
find_library(HAVE_LIB_PANGOXFT pangoxft-1.0 ${CMAKE_LIBRARY_PATH})
if(APPLE)
set(HAVE_LIB_GOBJECT TRUE)
else()
find_library(HAVE_LIB_GOBJECT gobject-2.0 ${CMAKE_LIBRARY_PATH})
endif(APPLE)
endif(HAVE_PANGO_H AND HAVE_PANGOXFT_H)
if(HAVE_LIB_PANGO AND HAVE_LIB_PANGOXFT AND HAVE_LIB_GOBJECT)
set(USE_PANGO TRUE)
# message(STATUS "USE_PANGO=" ${USE_PANGO})
# remove last 3 components of HAVE_PANGO_H and put in PANGO_H_PREFIX
get_filename_component(PANGO_H_PREFIX ${HAVE_PANGO_H} PATH)
get_filename_component(PANGO_H_PREFIX ${PANGO_H_PREFIX} PATH)
get_filename_component(PANGO_H_PREFIX ${PANGO_H_PREFIX} PATH)
get_filename_component(PANGOLIB_DIR ${HAVE_LIB_PANGO} PATH)
# glib.h is usually in ${PANGO_H_PREFIX}/glib-2.0/ ...
find_path(GLIB_H_PATH glib.h ${PANGO_H_PREFIX}/glib-2.0)
if(NOT GLIB_H_PATH) # ... but not under NetBSD
find_path(GLIB_H_PATH glib.h ${PANGO_H_PREFIX}/glib/glib-2.0)
endif(NOT GLIB_H_PATH)
include_directories(${PANGO_H_PREFIX}/pango-1.0 ${GLIB_H_PATH} ${PANGOLIB_DIR}/glib-2.0/include)
list(APPEND FLTK_LDLIBS -lpango-1.0 -lpangoxft-1.0 -lgobject-2.0)
if (APPLE)
set (LDFLAGS "${LDFLAGS} -L/sw/lib")
endif (APPLE)
endif(HAVE_LIB_PANGO AND HAVE_LIB_PANGOXFT AND HAVE_LIB_GOBJECT)
endif(X11_Xft_FOUND AND OPTION_USE_PANGO)
if(OPTION_USE_XFT)
set(USE_XFT X11_Xft_FOUND)
list(APPEND FLTK_LDLIBS -lXft)
set(FLTK_XFT_FOUND TRUE)
if(APPLE AND OPTION_APPLE_X11)
find_library(LIB_fontconfig fontconfig "/opt/X11/lib")
endif(APPLE AND OPTION_APPLE_X11)
else()
set(FLTK_XFT_FOUND FALSE)
endif(OPTION_USE_XFT)
#######################################################################
if(X11_Xrender_FOUND)
option(OPTION_USE_XRENDER "use lib Xrender" ON)
endif(X11_Xrender_FOUND)
if(OPTION_USE_XRENDER)
set(HAVE_XRENDER ${X11_Xrender_FOUND})
if(HAVE_XRENDER)
include_directories(${X11_Xrender_INCLUDE_PATH})
list(APPEND FLTK_LDLIBS -lXrender)
set(FLTK_XRENDER_FOUND TRUE)
else(HAVE_XRENDER)
set(FLTK_XRENDER_FOUND FALSE)
endif(HAVE_XRENDER)
else(OPTION_USE_XRENDER)
set(FLTK_XRENDER_FOUND FALSE)
endif(OPTION_USE_XRENDER)
#######################################################################
if(X11_FOUND)
option(OPTION_USE_XDBE "use lib Xdbe" ON)
endif(X11_FOUND)
if(OPTION_USE_XDBE AND HAVE_XDBE_H)
set(HAVE_XDBE 1)
set(FLTK_XDBE_FOUND TRUE)
else()
set(FLTK_XDBE_FOUND FALSE)
endif(OPTION_USE_XDBE AND HAVE_XDBE_H)
#######################################################################
set(FL_NO_PRINT_SUPPORT FALSE)
if(X11_FOUND AND NOT OPTION_PRINT_SUPPORT)
set(FL_NO_PRINT_SUPPORT TRUE)
endif(X11_FOUND AND NOT OPTION_PRINT_SUPPORT)
#######################################################################
#######################################################################
set(FL_CFG_NO_FILESYSTEM_SUPPORT TRUE)
if(OPTION_FILESYSTEM_SUPPORT)
set(FL_CFG_NO_FILESYSTEM_SUPPORT FALSE)
endif(OPTION_FILESYSTEM_SUPPORT)
#######################################################################
#######################################################################
# prior to CMake 3.0 this feature was buggy
if(NOT CMAKE_VERSION VERSION_LESS 3.0.0)
option(CMAKE_SUPPRESS_REGENERATION
"suppress rules to re-run CMake on rebuild" OFF)
mark_as_advanced(CMAKE_SUPPRESS_REGENERATION)
endif(NOT CMAKE_VERSION VERSION_LESS 3.0.0)
#######################################################################
# Debugging ...
if (DEBUG_OPTIONS_CMAKE)
message (STATUS "") # empty line
fl_debug_var (WIN32)
fl_debug_var (LIBS)
fl_debug_var (GLLIBS)
fl_debug_var (FLTK_LDLIBS)
fl_debug_var (USE_FIND_FILE)
fl_debug_var (OPENGL_FOUND)
fl_debug_var (OPENGL_INCLUDE_DIR)
fl_debug_var (OPENGL_LIBRARIES)
message ("--- X11 ---")
fl_debug_var (X11_FOUND)
fl_debug_var (X11_INCLUDE_DIR)
fl_debug_var (X11_LIBRARIES)
fl_debug_var (X11_X11_LIB)
fl_debug_var (X11_X11_INCLUDE_PATH)
fl_debug_var (X11_Xft_INCLUDE_PATH)
fl_debug_var (X11_Xft_LIB)
fl_debug_var (X11_Xft_FOUND)
fl_debug_var (PATH_TO_XLIBS)
message (STATUS "[** end of options.cmake **]")
endif (DEBUG_OPTIONS_CMAKE)
unset (DEBUG_OPTIONS_CMAKE)
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