git.mutantstargoat.com Git - freeglut/blob - CMakeLists.txt

   1 CMAKE_MINIMUM_REQUIRED(VERSION 3.0.0 FATAL_ERROR)
   2 PROJECT(freeglut)
   3
   4 # for multiarch LIBDIR support (requires cmake>=2.8.8)
   5 INCLUDE(GNUInstallDirs)
   6
   7 # NOTE: On Windows and Cygwin, the dll's are placed in the
   8 # CMAKE_RUNTIME_OUTPUT_DIRECTORY, while their corresponding import
   9 # libraries end up in CMAKE_ARCHIVE_OUTPUT_DIRECTORY. On other
  10 # platforms, such as Linux, the shared libraries are put in
  11 # CMAKE_ARCHIVE_OUTPUT_DIRECTORY instead.
  12 # Static libraries end up in CMAKE_ARCHIVE_OUTPUT_DIRECTORY on all
  13 # platforms.
  14 SET(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/bin)
  15 SET(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
  16 SET(CMAKE_ARCHIVE_OUTPUT_DIRECTORY ${PROJECT_BINARY_DIR}/lib)
  17
  18 # setup version numbers
  19 # TODO: Update these for each release!
  20 set(VERSION_MAJOR 3)
  21 set(VERSION_MINOR 0)
  22 set(VERSION_PATCH 0)
  23 set(VERSION ${VERSION_MAJOR}.${VERSION_MINOR}.${VERSION_PATCH})
  24
  25 # Update fg_version.h to match the versions number here in cmake
  26 CONFIGURE_FILE(src/fg_version.h.in src/fg_version.h)
  27
  28 # shared lib version numbers (change before release)
  29 set(SO_MAJOR 3)         # increment on backwards incompatible API/ABI changes
  30 set(SO_MINOR 10)        # increment on backwards compatible or internal changes
  31 set(SO_REV 0)           # if nothing else changed increment this
  32
  33 # FREEGLUT_BUILD_SHARED_LIBS is already a standard CMake variable, but we need to
  34 # re-declare it here so it will show up in the GUI.
  35 # by default, we want to build both
  36 OPTION(FREEGLUT_BUILD_SHARED_LIBS "Build FreeGLUT shared library." ON)
  37 OPTION(FREEGLUT_BUILD_STATIC_LIBS "Build FreeGLUT static library." ON)
  38
  39 # option for whether warnings and errors should be printed
  40 OPTION(FREEGLUT_PRINT_ERRORS "Lib prints errors to stderr" ON)
  41 #MARK_AS_ADVANCED(FREEGLUT_PRINT_ERRORS)
  42 OPTION(FREEGLUT_PRINT_WARNINGS "Lib prints warnings to stderr" ON)
  43 #MARK_AS_ADVANCED(FREEGLUT_PRINT_WARNINGS)
  44
  45 # option to also copy .pdb files to install directory when executing
  46 # INSTALL target
  47 IF(MSVC)
  48     OPTION(INSTALL_PDB "Also install .pdb files" ON)
  49 ELSE()
  50     SET(INSTALL_PDB OFF)
  51 ENDIF()
  52
  53 # OpenGL ES support
  54 OPTION(FREEGLUT_GLES "Use OpenGL ES (requires EGL)" OFF)
  55
  56 # option to build either as "glut" (ON) or "freeglut" (OFF)
  57 IF(WIN32)
  58     OPTION(FREEGLUT_REPLACE_GLUT "Be a replacement for GLUT" OFF)
  59 ELSE()
  60     OPTION(FREEGLUT_REPLACE_GLUT "Be a replacement for GLUT" ON)
  61 ENDIF()
  62
  63 IF(NOT WIN32)
  64     # Wayland support
  65     OPTION(FREEGLUT_WAYLAND "Use Wayland (no X11)" OFF)
  66 ENDIF()
  67
  68
  69 SET(FREEGLUT_HEADERS
  70     include/GL/freeglut.h
  71     include/GL/freeglut_ucall.h
  72     include/GL/freeglut_ext.h
  73     include/GL/freeglut_std.h
  74 )
  75 IF(FREEGLUT_REPLACE_GLUT)
  76     LIST(APPEND FREEGLUT_SRCS
  77         include/GL/glut.h
  78     )
  79 ENDIF()
  80 SET(FREEGLUT_SRCS
  81     ${FREEGLUT_HEADERS}
  82     src/fg_callbacks.c
  83     src/fg_cursor.c
  84     src/fg_display.c
  85     src/fg_ext.c
  86     src/fg_font_data.c
  87     src/fg_gamemode.c
  88     src/fg_geometry.c
  89     src/fg_gl2.c
  90     src/fg_gl2.h
  91     src/fg_init.c
  92     src/fg_init.h
  93     src/fg_internal.h
  94     src/fg_callback_macros.h
  95     src/fg_input_devices.c
  96     src/fg_joystick.c
  97     src/fg_main.c
  98     src/fg_misc.c
  99     src/fg_overlay.c
 100     src/fg_spaceball.c
 101     src/fg_state.c
 102     src/fg_stroke_mono_roman.c
 103     src/fg_stroke_roman.c
 104     src/fg_structure.c
 105     src/fg_teapot.c
 106     src/fg_teapot_data.h
 107     src/fg_videoresize.c
 108     src/fg_window.c
 109 )
 110 # TODO: OpenGL ES requires a compatible version of these files:
 111 IF(NOT FREEGLUT_GLES)
 112     LIST(APPEND FREEGLUT_SRCS
 113         src/fg_font.c
 114         src/fg_menu.c
 115     )
 116 ELSE()
 117     LIST(APPEND FREEGLUT_SRCS
 118         src/gles_stubs.c
 119     )
 120 ENDIF()
 121
 122 IF(WIN32)
 123     LIST(APPEND FREEGLUT_SRCS
 124         src/mswin/fg_cursor_mswin.c
 125         src/mswin/fg_display_mswin.c
 126         src/mswin/fg_ext_mswin.c
 127         src/mswin/fg_gamemode_mswin.c
 128         src/mswin/fg_init_mswin.c
 129         src/mswin/fg_internal_mswin.h
 130         src/mswin/fg_input_devices_mswin.c
 131         src/mswin/fg_joystick_mswin.c
 132         src/mswin/fg_main_mswin.c
 133         src/mswin/fg_menu_mswin.c
 134         src/mswin/fg_spaceball_mswin.c
 135         src/mswin/fg_state_mswin.c
 136         src/mswin/fg_structure_mswin.c
 137         src/mswin/fg_window_mswin.c
 138         ${CMAKE_BINARY_DIR}/freeglut.rc # generated below from freeglut.rc.in
 139     )
 140     IF (MSVC AND NOT CMAKE_CL_64)
 141         # .def file only for 32bit Windows builds (TODO: MSVC only right
 142         # now, needed for any other Windows platform?)
 143         LIST(APPEND FREEGLUT_SRCS
 144             ${CMAKE_BINARY_DIR}/freeglutdll.def # generated below from src/freeglutdll.def.in
 145         )
 146     ENDIF()
 147
 148 ELSEIF(ANDROID OR BLACKBERRY)
 149     # BlackBerry and Android share some similar design concepts and ideas, as with many mobile devices.
 150     # As such, some classes can be shared between the two. XXX: Possibly rename shareable classes to
 151     # a more generic name. *_stub? *_mobile?
 152     LIST(APPEND FREEGLUT_SRCS
 153         src/android/fg_cursor_android.c
 154         src/android/fg_ext_android.c
 155         src/android/fg_gamemode_android.c
 156         src/android/fg_joystick_android.c
 157         src/android/fg_spaceball_android.c
 158     )
 159     IF(ANDROID)
 160         LIST(APPEND FREEGLUT_SRCS
 161             src/android/native_app_glue/android_native_app_glue.c
 162             src/android/native_app_glue/android_native_app_glue.h
 163             src/android/fg_internal_android.h
 164             src/android/fg_init_android.c
 165             src/android/fg_input_devices_android.c
 166             src/android/fg_main_android.c
 167             src/android/fg_main_android.h
 168             src/android/fg_runtime_android.c
 169             src/android/fg_state_android.c
 170             src/android/fg_structure_android.c
 171             src/android/fg_window_android.c
 172         )
 173     ELSE()
 174         LIST(APPEND FREEGLUT_SRCS
 175             src/blackberry/fg_internal_blackberry.h
 176             src/blackberry/fg_init_blackberry.c
 177             src/x11/fg_input_devices_x11.c
 178             src/blackberry/fg_main_blackberry.c
 179             src/blackberry/fg_state_blackberry.c
 180             src/blackberry/fg_structure_blackberry.c
 181             src/blackberry/fg_window_blackberry.c
 182         )
 183     ENDIF()
 184
 185 ELSE()
 186     # UNIX (Wayland)
 187     IF(FREEGLUT_WAYLAND)
 188         LIST(APPEND FREEGLUT_SRCS
 189             src/wayland/fg_cursor_wl.c
 190             src/wayland/fg_ext_wl.c
 191             src/wayland/fg_gamemode_wl.c
 192             src/wayland/fg_init_wl.c
 193             src/wayland/fg_internal_wl.h
 194             src/wayland/fg_input_devices_wl.c
 195             src/wayland/fg_main_wl.c
 196             src/wayland/fg_state_wl.c
 197             src/wayland/fg_structure_wl.c
 198             src/wayland/fg_window_wl.c
 199             # font, serial port & joystick code are agnostic
 200             src/x11/fg_glutfont_definitions_x11.c
 201             src/x11/fg_input_devices_x11.c
 202             src/x11/fg_joystick_x11.c
 203         )
 204     # UNIX (X11)
 205     ELSE()
 206         LIST(APPEND FREEGLUT_SRCS
 207             src/x11/fg_cursor_x11.c
 208             src/x11/fg_ext_x11.c
 209             src/x11/fg_gamemode_x11.c
 210             src/x11/fg_glutfont_definitions_x11.c
 211             src/x11/fg_init_x11.c
 212             src/x11/fg_internal_x11.h
 213             src/x11/fg_input_devices_x11.c
 214             src/x11/fg_joystick_x11.c
 215             src/x11/fg_main_x11.c
 216             src/x11/fg_menu_x11.c
 217             src/x11/fg_spaceball_x11.c
 218             src/x11/fg_state_x11.c
 219             src/x11/fg_structure_x11.c
 220             src/x11/fg_window_x11.c
 221             src/x11/fg_xinput_x11.c
 222         )
 223         IF(NOT(FREEGLUT_GLES))
 224             LIST(APPEND FREEGLUT_SRCS
 225                 src/x11/fg_internal_x11_glx.h
 226                 src/x11/fg_display_x11_glx.c
 227                 src/x11/fg_state_x11_glx.c
 228                 src/x11/fg_state_x11_glx.h
 229                 src/x11/fg_window_x11_glx.c
 230                 src/x11/fg_window_x11_glx.h
 231             )
 232         ENDIF()
 233     ENDIF()
 234 ENDIF()
 235
 236 # OpenGL ES requires EGL, and so does Wayland
 237 IF(FREEGLUT_GLES OR FREEGLUT_WAYLAND)
 238     LIST(APPEND FREEGLUT_SRCS
 239         src/egl/fg_internal_egl.h
 240         src/egl/fg_display_egl.c
 241         src/egl/fg_ext_egl.c
 242         src/egl/fg_init_egl.c
 243         src/egl/fg_init_egl.h
 244         src/egl/fg_state_egl.c
 245         src/egl/fg_state_egl.h
 246         src/egl/fg_structure_egl.c
 247         src/egl/fg_structure_egl.h
 248         src/egl/fg_window_egl.c
 249         src/egl/fg_window_egl.h
 250     )
 251 ENDIF()
 252
 253 # For OpenGL ES (GLES): compile with -DFREEGLUT_GLES to cleanly
 254 # bootstrap headers inclusion in freeglut_std.h; this constant also
 255 # need to be defined in client applications (e.g. through pkg-config),
 256 # but do use GLES constants directly for all other needs
 257 # GLES1 and GLES2 libraries are compatible and can be co-linked.
 258 IF(FREEGLUT_GLES)
 259     LIST(APPEND PUBLIC_DEFINITIONS -DFREEGLUT_GLES)
 260     LIST(APPEND LIBS GLESv2 GLESv1_CM EGL)
 261 ELSE()
 262   FIND_PACKAGE(OpenGL REQUIRED)
 263   LIST(APPEND LIBS ${OPENGL_gl_LIBRARY})
 264   INCLUDE_DIRECTORIES(${OPENGL_INCLUDE_DIR})
 265 ENDIF()
 266
 267 # For Wayland: compile with -DFREEGLUT_WAYLAND and pull EGL
 268 IF(FREEGLUT_WAYLAND)
 269   ADD_DEFINITIONS(-DFREEGLUT_WAYLAND)
 270   LIST(APPEND LIBS wayland-client wayland-cursor wayland-egl EGL xkbcommon)
 271 ENDIF()
 272
 273 # lib m for math, not needed on windows
 274 IF (NOT WIN32)
 275     # For compilation:
 276     LIST(APPEND LIBS m)
 277     # For CHECK_FUNCTION_EXISTS:
 278     LIST(APPEND CMAKE_REQUIRED_LIBRARIES m)
 279 ENDIF()
 280
 281 IF(WIN32)
 282     # hide insecure CRT warnings, common practice
 283     ADD_DEFINITIONS(-D_CRT_SECURE_NO_WARNINGS)
 284     IF(MSVC)
 285         SET( CMAKE_DEBUG_POSTFIX "d" )
 286     ENDIF(MSVC)
 287
 288     IF(NOT(MSVC_VERSION LESS "1600"))
 289     # minimum requirement for WM_TOUCH device
 290         ADD_DEFINITIONS(-D_WIN32_WINNT=0x0601)
 291         ADD_DEFINITIONS(-DWINVER=0x0601)
 292     ELSEIF(NOT(MSVC_VERSION LESS "1300"))
 293     # minimum requirement for spaceball device
 294         ADD_DEFINITIONS(-D_WIN32_WINNT=0x0501)
 295         ADD_DEFINITIONS(-DWINVER=0x0501)
 296     ELSE()
 297     # enable the use of Win2000 APIs (needed for really old compilers like MSVC6)
 298         ADD_DEFINITIONS(-D_WIN32_WINNT=0x0500)
 299         ADD_DEFINITIONS(-DWINVER=0x0500)
 300     ENDIF()
 301
 302 ENDIF()
 303
 304 IF(CMAKE_COMPILER_IS_GNUCC)
 305   SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall")
 306   IF(NOT(ANDROID OR BLACKBERRY OR FREEGLUT_WAYLAND))
 307     # not setting -ansi as EGL/KHR headers doesn't support it
 308     SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pedantic")
 309   ENDIF()
 310 ENDIF(CMAKE_COMPILER_IS_GNUCC)
 311
 312 INCLUDE(CheckIncludeFiles)
 313 IF(UNIX AND NOT(ANDROID OR BLACKBERRY OR FREEGLUT_WAYLAND))
 314     FIND_PACKAGE(X11 REQUIRED)
 315     INCLUDE_DIRECTORIES(${X11_X11_INCLUDE_PATH})
 316     LIST(APPEND LIBS ${X11_X11_LIB})
 317     IF(X11_Xrandr_FOUND)
 318         SET(HAVE_X11_EXTENSIONS_XRANDR_H TRUE)
 319         LIST(APPEND LIBS ${X11_Xrandr_LIB})
 320     ENDIF()
 321     IF(X11_xf86vmode_FOUND)
 322         SET(HAVE_X11_EXTENSIONS_XF86VMODE_H TRUE)
 323         LIST(APPEND LIBS ${X11_Xxf86vm_LIB})
 324     ENDIF()
 325     IF(X11_Xinput_FOUND)
 326         # Needed for multi-touch:
 327         CHECK_INCLUDE_FILES("${X11_Xinput_INCLUDE_PATH}/X11/extensions/XInput2.h" HAVE_X11_EXTENSIONS_XINPUT2_H)
 328         LIST(APPEND LIBS ${X11_Xinput_LIB})
 329     ELSE()
 330         MESSAGE(FATAL_ERROR "Missing X11's XInput.h (X11/extensions/XInput.h)")
 331     ENDIF()
 332 ENDIF()
 333 IF(ANDROID)
 334     # -landroid for ANativeWindow
 335     # -llog for native Android logging
 336     LIST(APPEND LIBS android log)
 337 ELSEIF(BLACKBERRY)
 338     # -lbps for event loop
 339     # -screen for native screen
 340     LIST(APPEND LIBS bps screen)
 341
 342     if(NOT PLAYBOOK)
 343         # -lslog2 for logging
 344         # -pps for low-level screen manipulation
 345         LIST(APPEND LIBS slog2 pps)
 346     ENDIF()
 347 ENDIF()
 348
 349 INCLUDE(CheckFunctionExists)
 350 INCLUDE(CheckTypeSize)
 351 CHECK_INCLUDE_FILES(sys/types.h HAVE_SYS_TYPES_H)
 352 CHECK_INCLUDE_FILES(unistd.h    HAVE_UNISTD_H)
 353 CHECK_INCLUDE_FILES(sys/time.h  HAVE_SYS_TIME_H)
 354 CHECK_INCLUDE_FILES(stdbool.h   HAVE_STDBOOL_H)
 355 CHECK_INCLUDE_FILES(sys/param.h HAVE_SYS_PARAM_H)
 356 CHECK_INCLUDE_FILES(sys/ioctl.h HAVE_SYS_IOCTL_H)
 357 CHECK_INCLUDE_FILES(fcntl.h     HAVE_FCNTL_H)
 358 CHECK_INCLUDE_FILES(usbhid.h    HAVE_USBHID_H)
 359 CHECK_FUNCTION_EXISTS(gettimeofday HAVE_GETTIMEOFDAY)
 360 CHECK_FUNCTION_EXISTS(XParseGeometry   HAVE_XPARSEGEOMETRY)
 361 IF (NOT HAVE_XPARSEGEOMETRY)
 362    LIST(APPEND FREEGLUT_SRCS
 363         src/util/xparsegeometry_repl.c
 364         src/util/xparsegeometry_repl.h)
 365    SET(NEED_XPARSEGEOMETRY_IMPL TRUE)
 366 ENDIF()
 367 # decide on suitable type for internal time keeping, 64-bit if possible
 368 CHECK_INCLUDE_FILES(stdint.h    HAVE_STDINT_H)
 369 CHECK_INCLUDE_FILES(inttypes.h  HAVE_INTTYPES_H)
 370 IF (NOT (HAVE_STDINT_H OR HAVE_INTTYPES_H))
 371     IF (MSVC)
 372         # Some old Microsoft VC releases don't support unsigned long
 373         # long, but all we care about is support for unsigned __int64 on
 374         # MSVC, so test for presence of that type
 375         CHECK_TYPE_SIZE("unsigned __int64" U__INT64 BUILTIN_TYPES_ONLY)
 376     ELSEIF()
 377         CHECK_TYPE_SIZE("unsigned long long" ULONG_LONG BUILTIN_TYPES_ONLY)
 378     ENDIF()
 379 ENDIF()
 380
 381 # The generated config.h is placed in the project's build directory, just to
 382 # ensure that all CMake-generated files are kept away from the main source tree.
 383 # As a result, the build directory must to be added to the include path list.
 384 CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/config.h.in ${CMAKE_BINARY_DIR}/config.h)
 385 INCLUDE_DIRECTORIES(BEFORE ${CMAKE_BINARY_DIR} ${CMAKE_CURRENT_SOURCE_DIR}/include ${CMAKE_CURRENT_SOURCE_DIR}/src)
 386 ADD_DEFINITIONS(-DHAVE_CONFIG_H)
 387 IF(WIN32)
 388     # we also have to generate freeglut.rc, which contains the version
 389     # number
 390     CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/freeglut.rc.in ${CMAKE_BINARY_DIR}/freeglut.rc)
 391     IF (MSVC AND NOT CMAKE_CL_64)
 392         # .def file only for 32bit Windows builds with Visual Studio
 393         CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/src/freeglutdll.def.in ${CMAKE_BINARY_DIR}/freeglutdll.def)
 394     ENDIF()
 395 ENDIF()
 396
 397 IF(FREEGLUT_BUILD_SHARED_LIBS)
 398     ADD_LIBRARY(freeglut SHARED ${FREEGLUT_SRCS})
 399 ENDIF()
 400 IF(FREEGLUT_BUILD_STATIC_LIBS)
 401     ADD_LIBRARY(freeglut_static STATIC ${FREEGLUT_SRCS})
 402 ENDIF()
 403
 404
 405 SET(LIBNAME freeglut)
 406 IF(WIN32)
 407     IF(FREEGLUT_REPLACE_GLUT)
 408         SET(LIBNAME glut)
 409     ENDIF()
 410
 411     LIST(APPEND LIBS winmm)
 412     IF(FREEGLUT_BUILD_SHARED_LIBS)
 413         TARGET_COMPILE_DEFINITIONS(freeglut PRIVATE FREEGLUT_EXPORTS)
 414         SET_TARGET_PROPERTIES(freeglut PROPERTIES OUTPUT_NAME ${LIBNAME})
 415     ENDIF()
 416     IF(FREEGLUT_BUILD_STATIC_LIBS)
 417         TARGET_COMPILE_DEFINITIONS(freeglut_static PUBLIC FREEGLUT_STATIC)
 418         IF(FREEGLUT_REPLACE_GLUT)
 419             SET_TARGET_PROPERTIES(freeglut_static PROPERTIES OUTPUT_NAME ${LIBNAME})
 420         ENDIF()
 421         # need to set machine:x64 for linker, at least for VC10, and
 422         # doesn't hurt for older compilers:
 423         # http://public.kitware.com/Bug/view.php?id=11240#c22768
 424         IF (CMAKE_CL_64)
 425             SET_TARGET_PROPERTIES(freeglut_static PROPERTIES STATIC_LIBRARY_FLAGS "/machine:x64")
 426         ENDIF()
 427     ENDIF()
 428 ELSE()
 429     # on UNIX we need to make sure:
 430     # - all shared libraries must have a soname/version, see :
 431     #   http://sourceware.org/autobook/autobook/autobook_91.html#SEC91
 432     #   http://www.gnu.org/software/libtool/manual/html_node/Updating-version-info.html
 433     #   Current: -version-info 12:0:9 -> 3.9.0
 434     #   Note: most platforms now prefer the latter major.minor.revision form
 435     #   (e.g. FreeBSD, cf. http://debbugs.gnu.org/cgi/bugreport.cgi?bug=8765),
 436     #   or special-cased FreeGLUT long ago (e.g. .so.4 on OpenBSD), so
 437     #   the lack of support for current:revision:age in CMake should
 438     #   not be a problem.
 439     # - the output library should be named glut so it'll be linkable with -lglut
 440     #   (unless FREEGLUT_REPLACE_GLUT is false).
 441     # - the shared library should link to the dependency libraries so that the user
 442     #   won't have to link them explicitly (they shouldn't have to know that we depend
 443     #   on Xrandr or Xxf86vm)
 444     IF(FREEGLUT_GLES)
 445         SET(LIBNAME freeglut-gles)
 446     ELSE()
 447         IF(FREEGLUT_REPLACE_GLUT)
 448             SET(LIBNAME glut)
 449         ENDIF()
 450     ENDIF()
 451
 452     IF(FREEGLUT_BUILD_SHARED_LIBS)
 453       SET_TARGET_PROPERTIES(freeglut PROPERTIES VERSION ${SO_MAJOR}.${SO_MINOR}.${SO_REV} SOVERSION ${SO_MAJOR} OUTPUT_NAME ${LIBNAME})
 454     ENDIF()
 455     IF(FREEGLUT_BUILD_STATIC_LIBS)
 456       SET_TARGET_PROPERTIES(freeglut_static PROPERTIES OUTPUT_NAME ${LIBNAME})
 457     ENDIF()
 458     IF(ANDROID)
 459         # Not in CMake toolchain file, because the toolchain
 460         # file is called several times and generally doesn't
 461         # seem to be meant for modifying CFLAGS:
 462         # '-mandroid' is not mandatory but doesn't hurt
 463         # '-O0 -gstabs+' helps the currently buggy GDB port
 464         # Too late to manipulate ENV: SET(ENV{CFLAGS} "$ENV{CFLAGS} -mandroid")
 465         # Not using _INIT variables, they seem to be used internally only
 466         IF ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
 467             SET(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -mandroid")
 468         ENDIF()
 469         SET(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -O0 -gstabs+")
 470     ENDIF()
 471 ENDIF()
 472 IF(FREEGLUT_BUILD_SHARED_LIBS)
 473     TARGET_LINK_LIBRARIES(freeglut ${LIBS})
 474     TARGET_COMPILE_DEFINITIONS(freeglut PUBLIC ${PUBLIC_DEFINITIONS})
 475 ENDIF()
 476 IF(FREEGLUT_BUILD_STATIC_LIBS)
 477     TARGET_LINK_LIBRARIES(freeglut_static ${LIBS})
 478     TARGET_COMPILE_DEFINITIONS(freeglut_static PUBLIC ${PUBLIC_DEFINITIONS})
 479 ENDIF()
 480
 481 IF(FREEGLUT_BUILD_SHARED_LIBS)
 482     INSTALL(TARGETS freeglut EXPORT FreeGLUTTargets
 483             RUNTIME DESTINATION bin
 484             LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 485             ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
 486             INCLUDES DESTINATION include
 487     )
 488     IF(INSTALL_PDB)
 489         IF(CMAKE_GENERATOR MATCHES "^Visual Studio")
 490             INSTALL(FILES ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/Debug/freeglut${CMAKE_DEBUG_POSTFIX}.pdb
 491                 DESTINATION bin
 492                 CONFIGURATIONS Debug
 493                 COMPONENT Devel)
 494         ELSE()
 495             INSTALL(FILES ${CMAKE_RUNTIME_OUTPUT_DIRECTORY}/freeglut${CMAKE_DEBUG_POSTFIX}.pdb
 496                 DESTINATION bin
 497                 CONFIGURATIONS Debug
 498                 COMPONENT Devel)
 499         ENDIF()
 500     ENDIF()
 501 ENDIF()
 502 IF(FREEGLUT_BUILD_STATIC_LIBS)
 503     INSTALL(TARGETS freeglut_static EXPORT FreeGLUTTargets
 504             RUNTIME DESTINATION bin
 505             LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
 506             ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
 507             INCLUDES DESTINATION include
 508     )
 509 ENDIF()
 510 INSTALL(FILES ${FREEGLUT_HEADERS} DESTINATION include/GL COMPONENT Devel)
 511
 512
 513
 514 # Optionally build demos, on by default.
 515 option( FREEGLUT_BUILD_DEMOS "Build FreeGLUT demos." ON )
 516
 517 SET(DEMO_LIBS ${OPENGL_glu_LIBRARY} ${LIBS})
 518 # lib m for math, not needed on windows
 519 IF (NOT WIN32)
 520     LIST(APPEND DEMO_LIBS m)
 521 ENDIF()
 522
 523 MACRO(ADD_DEMO name)
 524     IF( FREEGLUT_BUILD_DEMOS )
 525         IF(FREEGLUT_BUILD_SHARED_LIBS)
 526             ADD_EXECUTABLE(${name} ${ARGN})
 527             TARGET_LINK_LIBRARIES(${name} ${DEMO_LIBS} freeglut)
 528             IF(WIN32 AND MSVC)
 529                 SET_TARGET_PROPERTIES(${name} PROPERTIES DEBUG_POSTFIX d)
 530             ENDIF()
 531         ENDIF()
 532         IF(FREEGLUT_BUILD_STATIC_LIBS)
 533             ADD_EXECUTABLE(${name}_static ${ARGN})
 534             TARGET_LINK_LIBRARIES(${name}_static ${DEMO_LIBS} freeglut_static)
 535             IF(WIN32 AND MSVC)
 536                 SET_TARGET_PROPERTIES(${name}_static PROPERTIES DEBUG_POSTFIX d)
 537             ENDIF()
 538         ENDIF()
 539     ENDIF()
 540 ENDMACRO()
 541
 542 ADD_DEMO(CallbackMaker   progs/demos/CallbackMaker/CallbackMaker.c)
 543 ADD_DEMO(Fractals        progs/demos/Fractals/fractals.c)
 544 ADD_DEMO(Fractals_random progs/demos/Fractals_random/fractals_random.c)
 545 ADD_DEMO(Lorenz          progs/demos/Lorenz/lorenz.c)
 546 IF (NOT WIN32)
 547     ADD_DEMO(One             progs/demos/One/one.c)
 548 ELSE()
 549     ADD_DEMO(One             progs/demos/One/one.c
 550                              progs/demos/One/one.rc)
 551 ENDIF()
 552 ADD_DEMO(Resizer         progs/demos/Resizer/Resizer.cpp)
 553 ADD_DEMO(multi-touch     progs/demos/multi-touch/multi-touch.c)
 554 ADD_DEMO(shapes          progs/demos/shapes/shapes.c
 555                          progs/demos/shapes/glmatrix.h
 556                          progs/demos/shapes/glmatrix.c)
 557 ADD_DEMO(smooth_opengl3  progs/demos/smooth_opengl3/smooth_opengl3.c)
 558 IF(UNIX)
 559     ADD_DEMO(spaceball       progs/demos/spaceball/spaceball.c
 560                              progs/demos/spaceball/vmath.c
 561                              progs/demos/spaceball/vmath.h)
 562 ENDIF()
 563 ADD_DEMO(subwin          progs/demos/subwin/subwin.c)
 564 ADD_DEMO(timer           progs/demos/timer/timer.c)
 565 ADD_DEMO(timer_callback  progs/demos/timer_callback/timer.c)
 566
 567
 568
 569 # pkg-config support, to install at $(libdir)/pkgconfig
 570 # Define static build dependencies
 571 IF(WIN32)
 572   SET(PC_LIBS_PRIVATE "-lopengl32 -lwinmm -lgdi32 -lm")
 573 ELSEIF(FREEGLUT_GLES)
 574   IF(ANDROID)
 575     SET(PC_LIBS_PRIVATE "-llog -landroid -lGLESv2 -lGLESv1_CM -lEGL -lm")
 576   ELSEIF(BLACKBERRY)
 577     IF(PLAYBOOK)
 578       SET(PC_LIBS_PRIVATE "-lbps -lscreen -lGLESv2 -lGLESv1_CM -lEGL -lm")
 579     ELSE()
 580       SET(PC_LIBS_PRIVATE "-lbps -lslog2 -lscreen -lGLESv2 -lGLESv1_CM -lEGL -lm")
 581     ENDIF()
 582   ELSEIF(FREEGLUT_WAYLAND)
 583     SET(PC_LIBS_PRIVATE "-lwayland-client -lwayland-cursor -lwayland-egl -lGLESv2 -lGLESv1_CM -lEGL -lxkbcommon -lm")
 584   ELSE()
 585     SET(PC_LIBS_PRIVATE "-lX11 -lXxf86vm -lXrandr -lGLESv2 -lGLESv1_CM -lEGL -lm")
 586   ENDIF()
 587 ELSE()
 588   IF(FREEGLUT_WAYLAND)
 589     SET(PC_LIBS_PRIVATE "-lwayland-client -lwayland-cursor -lwayland-egl -lGL -lxkbcommon -lm")
 590   ELSE()
 591     SET(PC_LIBS_PRIVATE "-lX11 -lXxf86vm -lXrandr -lGL -lm")
 592   ENDIF()
 593 ENDIF()
 594 # Client applications need to define FreeGLUT GLES version to
 595 # bootstrap headers inclusion in freeglut_std.h:
 596 SET(PC_LIBNAME ${LIBNAME})
 597 SET(PC_FILENAME "${LIBNAME}.pc")
 598 IF(FREEGLUT_GLES)
 599   SET(PC_CFLAGS "-DFREEGLUT_GLES")
 600 ENDIF()
 601 IF(FREEGLUT_BUILD_STATIC_LIBS)
 602   LIST(APPEND PC_CFLAGS -DFREEGLUT_STATIC)
 603 ENDIF()
 604 CONFIGURE_FILE(${CMAKE_CURRENT_SOURCE_DIR}/freeglut.pc.in ${CMAKE_BINARY_DIR}/freeglut.pc @ONLY)
 605 INSTALL(FILES ${CMAKE_BINARY_DIR}/freeglut.pc DESTINATION ${CMAKE_INSTALL_LIBDIR}/pkgconfig/ RENAME ${PC_FILENAME} COMPONENT Devel)
 606 # TODO: change the library and .pc name when building for GLES,
 607 # e.g. -lglut-GLES
 608
 609 INCLUDE(CMakePackageConfigHelpers)
 610 WRITE_BASIC_PACKAGE_VERSION_FILE(
 611     "${CMAKE_CURRENT_BINARY_DIR}/FreeGLUT/FreeGLUTConfigVersion.cmake"
 612     VERSION ${VERSION}
 613     COMPATIBILITY AnyNewerVersion
 614 )
 615
 616 # needs cmake 3.0 (as does the "INCLUDES DIRECTORY" argument to install(TARGETS)):
 617 EXPORT(EXPORT FreeGLUTTargets
 618     FILE "${CMAKE_CURRENT_BINARY_DIR}/FreeGLUT/FreeGLUTTargets.cmake"
 619     NAMESPACE FreeGLUT::
 620 )
 621 CONFIGURE_FILE(FreeGLUTConfig.cmake.in
 622     "${CMAKE_CURRENT_BINARY_DIR}/FreeGLUT/FreeGLUTConfig.cmake"
 623     @ONLY
 624 )
 625 SET(ConfigPackageLocation lib/cmake/FreeGLUT)
 626 INSTALL(EXPORT FreeGLUTTargets
 627     FILE FreeGLUTTargets.cmake
 628     NAMESPACE FreeGLUT::
 629     DESTINATION ${ConfigPackageLocation}
 630 )
 631 INSTALL(
 632     FILES
 633     "${CMAKE_CURRENT_BINARY_DIR}/FreeGLUT/FreeGLUTConfig.cmake"
 634     "${CMAKE_CURRENT_BINARY_DIR}/FreeGLUT/FreeGLUTConfigVersion.cmake"
 635     DESTINATION ${ConfigPackageLocation}
 636     COMPONENT Devel
 637 )