CMake/SDL2: add ability to find SDL2 without pkg-config

CMakeLists.txt

@@ -59,17 +59,16 @@ find_package(ZLIB REQUIRED)
 
 if (ENABLE_SDL2)
 	include (FindPkgConfig)
-	pkg_search_module(SDL REQUIRED sdl2)
-	pkg_search_module(SDL_TTF REQUIRED SDL2_ttf)
-	pkg_search_module(SDL_IMAGE REQUIRED SDL2_image)
-	pkg_search_module(SDL_MIXER REQUIRED SDL2_mixer)
-	
-	#This is weird - SDL defines singular variables while pkg_search defines plural
-	set(SDL_INCLUDE_DIR "${SDL_INCLUDE_DIRS}")
-	set(SDL_LIBRARY "${SDL_LIBRARIES}")
-	set(SDLTTF_LIBRARY "${SDL_TTF_LIBRARIES}")
-	set(SDLIMAGE_LIBRARY "${SDL_IMAGE_LIBRARIES}")
-	set(SDLMIXER_LIBRARY "${SDL_MIXER_LIBRARIES}")
+	find_package(SDL2 REQUIRED)
+	find_package(SDL2_image REQUIRED)
+	find_package(SDL2_mixer REQUIRED)
+	find_package(SDL2_ttf REQUIRED)
+
+	set(SDL_INCLUDE_DIR "${SDL2_INCLUDE_DIR}")
+	set(SDL_LIBRARY "${SDL2_LIBRARY}")
+	set(SDLTTF_LIBRARY "${SDL2_TTF_LIBRARY}")
+	set(SDLIMAGE_LIBRARY "${SDL2_IMAGE_LIBRARY}")
+	set(SDLMIXER_LIBRARY "${SDL2_MIXER_LIBRARY}")
 else()
 	find_package(SDL REQUIRED)
 	find_package(SDL_image REQUIRED)
@@ -143,7 +142,7 @@ else()
 	include(GNUInstallDirs)
 
 	if (NOT BIN_DIR)
-                set(BIN_DIR "bin" CACHE STRING "Where to install binaries")
+        set(BIN_DIR "bin" CACHE STRING "Where to install binaries")
 	endif()
 	if (NOT LIB_DIR)
 		set(LIB_DIR "${CMAKE_INSTALL_LIBDIR}/vcmi" CACHE STRING "Where to install main library")

cmake_modules/COPYING-CMAKE-SCRIPTS

@@ -1,27 +0,0 @@
-The following files are derived from the Thermite project
-(http://www.thermite3d.org) and are covered under the license below.
-
-FindMYGUI.cmake, FindOGRE.cmake, FindOIS.cmake, FindBullet.cmake
-
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:
-
-1. Redistributions of source code must retain the copyright
-   notice, this list of conditions and the following disclaimer.
-2. Redistributions in binary form must reproduce the copyright
-   notice, this list of conditions and the following disclaimer in the
-   documentation and/or other materials provided with the distribution.
-3. The name of the author may not be used to endorse or promote products 
-   derived from this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
-IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
-OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
-IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
-INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
-NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
-THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

cmake_modules/FindSDL2.cmake

@@ -0,0 +1,216 @@
+#.rst:
+# FindSDL2
+# --------
+#
+# Locate SDL2 library
+#
+# This module defines
+#
+# ::
+#
+#   SDL2_LIBRARY, the name of the library to link against
+#   SDL2_FOUND, if false, do not try to link to SDL
+#   SDL2_INCLUDE_DIR, where to find SDL.h
+#   SDL2_VERSION_STRING, human-readable string containing the version of SDL
+#
+#
+#
+# This module responds to the flag:
+#
+# ::
+#
+#   SDL2_BUILDING_LIBRARY
+#     If this is defined, then no SDL2_main will be linked in because
+#     only applications need main().
+#     Otherwise, it is assumed you are building an application and this
+#     module will attempt to locate and set the proper link flags
+#     as part of the returned SDL2_LIBRARY variable.
+#
+#
+#
+# Don't forget to include SDLmain.h and SDLmain.m your project for the
+# OS X framework based version.  (Other versions link to -lSDL2main which
+# this module will try to find on your behalf.) Also for OS X, this
+# module will automatically add the -framework Cocoa on your behalf.
+#
+#
+#
+# Additional Note: If you see an empty SDL2_LIBRARY_TEMP in your
+# configuration and no SDL2_LIBRARY, it means CMake did not find your SDL
+# library (SDL2.dll, libSDL2.so, SDL.framework, etc).  Set
+# SDL2_LIBRARY_TEMP to point to your SDL library, and configure again.
+# Similarly, if you see an empty SDL2MAIN_LIBRARY, you should set this
+# value as appropriate.  These values are used to generate the final
+# SDL2_LIBRARY variable, but when these values are unset, SDL2_LIBRARY
+# does not get created.
+#
+#
+#
+# $SDL2DIR is an environment variable that would correspond to the
+# ./configure --prefix=$SDL2DIR used in building SDL.  l.e.galup 9-20-02
+#
+# Modified by Eric Wing.  Added code to assist with automated building
+# by using environmental variables and providing a more
+# controlled/consistent search behavior.  Added new modifications to
+# recognize OS X frameworks and additional Unix paths (FreeBSD, etc).
+# Also corrected the header search path to follow "proper" SDL
+# guidelines.  Added a search for SDLmain which is needed by some
+# platforms.  Added a search for threads which is needed by some
+# platforms.  Added needed compile switches for MinGW.
+#
+# On OSX, this will prefer the Framework version (if found) over others.
+# People will have to manually change the cache values of SDL2_LIBRARY to
+# override this selection or set the CMake environment
+# CMAKE_INCLUDE_PATH to modify the search paths.
+#
+
+#=============================================================================
+# Copyright 2003-2009 Kitware, Inc.
+# Copyright 2012 Benjamin Eikel
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file kitware license.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+if (NOT WIN32)
+    find_package(PkgConfig)
+    if (PKG_CONFIG_FOUND)
+        pkg_check_modules(_SDL2 sdl2)
+        set(SDL2_VERSION_STRING ${_SDL2_VERSION})
+    endif ()
+endif ()
+
+find_path(SDL2_INCLUDE_DIR 
+    SDL.h
+  HINTS
+    ${_SDL2_INCLUDEDIR}
+    ENV SDL2DIR
+  PATH_SUFFIXES 
+    SDL2
+    include/SDL2 
+    include
+)
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+  set(VC_LIB_PATH_SUFFIX lib/x64)
+else()
+  set(VC_LIB_PATH_SUFFIX lib/x86)
+endif()
+
+find_library(SDL2_LIBRARY_TEMP
+  NAMES 
+    SDL2
+  HINTS
+    ${_SDL2_LIBDIR}
+    ENV SDL2DIR
+  PATH_SUFFIXES 
+    lib 
+    ${VC_LIB_PATH_SUFFIX}
+)
+
+if(NOT SDL2_BUILDING_LIBRARY)
+  if(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework")
+    # Non-OS X framework versions expect you to also dynamically link to
+    # SDLmain. This is mainly for Windows and OS X. Other (Unix) platforms
+    # seem to provide SDLmain for compatibility even though they don't
+    # necessarily need it.
+    find_library(SDL2MAIN_LIBRARY
+      NAMES 
+        SDL2main
+      HINTS
+        ENV SDL2DIR
+      PATH_SUFFIXES 
+        lib
+        ${VC_LIB_PATH_SUFFIX}
+      PATHS
+        /sw
+        /opt/local
+        /opt/csw
+        /opt
+    )
+  endif()
+endif()
+
+# SDL may require threads on your system.
+# The Apple build may not need an explicit flag because one of the
+# frameworks may already provide it.
+# But for non-OSX systems, I will use the CMake Threads package.
+if(NOT APPLE)
+  find_package(Threads)
+endif()
+
+# MinGW needs an additional library, mwindows
+# It's total link flags should look like -lmingw32 -lSDLmain -lSDL -lmwindows
+# (Actually on second look, I think it only needs one of the m* libraries.)
+if(MINGW)
+  set(MINGW32_LIBRARY mingw32 CACHE STRING "mwindows for MinGW")
+endif()
+
+if(SDL2_LIBRARY_TEMP)
+  # For SDLmain
+  if(SDL2MAIN_LIBRARY AND NOT SDL2_BUILDING_LIBRARY)
+    list(FIND SDL2_LIBRARY_TEMP "${SDL2MAIN_LIBRARY}" _SDL2_MAIN_INDEX)
+    if(_SDL2_MAIN_INDEX EQUAL -1)
+      set(SDL2_LIBRARY_TEMP "${SDL2MAIN_LIBRARY}" ${SDL2_LIBRARY_TEMP})
+    endif()
+    unset(_SDL2_MAIN_INDEX)
+  endif()
+
+  # For OS X, SDL uses Cocoa as a backend so it must link to Cocoa.
+  # CMake doesn't display the -framework Cocoa string in the UI even
+  # though it actually is there if I modify a pre-used variable.
+  # I think it has something to do with the CACHE STRING.
+  # So I use a temporary variable until the end so I can set the
+  # "real" variable in one-shot.
+  if(APPLE)
+    set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} "-framework Cocoa")
+  endif()
+
+  # For threads, as mentioned Apple doesn't need this.
+  # In fact, there seems to be a problem if I used the Threads package
+  # and try using this line, so I'm just skipping it entirely for OS X.
+  if(NOT APPLE)
+    set(SDL2_LIBRARY_TEMP ${SDL2_LIBRARY_TEMP} ${CMAKE_THREAD_LIBS_INIT})
+  endif()
+
+  # For MinGW library
+  if(MINGW)
+    set(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP})
+  endif()
+
+  # Set the final string here so the GUI reflects the final state.
+  set(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found")
+  # Set the temp variable to INTERNAL so it is not seen in the CMake GUI
+  set(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "")
+endif()
+
+if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL_version.h" AND NOT SDL2_VERSION_STRING)
+  file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_INCLUDE_DIR}/SDL_version.h" SDL2_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MAJOR "${SDL2_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MINOR "${SDL2_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_PATCH "${SDL2_VERSION_PATCH_LINE}")
+  set(SDL2_VERSION_STRING ${SDL2_VERSION_MAJOR}.${SDL2_VERSION_MINOR}.${SDL2_VERSION_PATCH})
+  unset(SDL2_VERSION_MAJOR_LINE)
+  unset(SDL2_VERSION_MINOR_LINE)
+  unset(SDL2_VERSION_PATCH_LINE)
+  unset(SDL2_VERSION_MAJOR)
+  unset(SDL2_VERSION_MINOR)
+  unset(SDL2_VERSION_PATCH)
+endif()
+
+set(SDL2_LIBRARIES ${SDL2_LIBRARY})
+set(SDL2_INCLUDE_DIRS ${SDL2_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2
+                                  REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR
+                                  VERSION_VAR SDL2_VERSION_STRING)

cmake_modules/FindSDL2_image.cmake

@@ -0,0 +1,100 @@
+#.rst:
+# FindSDL2_image
+# --------------
+#
+# Locate SDL2_image library
+#
+# This module defines:
+#
+# ::
+#
+#   SDL2_IMAGE_LIBRARIES, the name of the library to link against
+#   SDL2_IMAGE_INCLUDE_DIRS, where to find the headers
+#   SDL2_IMAGE_FOUND, if false, do not try to link against
+#   SDL2_IMAGE_VERSION_STRING - human-readable string containing the version of SDL2_image
+#
+# $SDL2DIR is an environment variable that would correspond to the
+# ./configure --prefix=$SDL2DIR used in building SDL.
+#
+# Created by Eric Wing.  This was influenced by the FindSDL2.cmake
+# module, but with modifications to recognize OS X frameworks and
+# additional Unix paths (FreeBSD, etc).
+
+#=============================================================================
+# Copyright 2005-2009 Kitware, Inc.
+# Copyright 2012 Benjamin Eikel
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file kitware license.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+if (NOT WIN32)
+    find_package(PkgConfig)
+    if (PKG_CONFIG_FOUND)
+        pkg_check_modules(_SDL2_IMAGE SDL2_image)
+        set(SDL2_IMAGE_VERSION_STRING ${_SDL2_IMAGE_VERSION})
+    endif ()
+endif ()
+
+find_path(SDL2_IMAGE_INCLUDE_DIR
+    SDL_image.h
+  HINTS
+    ${_SDL2_IMAGE_INCLUDEDIR}
+    ENV SDL2IMAGEDIR
+    ENV SDL2DIR
+  PATH_SUFFIXES 
+    SDL2
+    include/SDL2 
+    include
+)
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+  set(VC_LIB_PATH_SUFFIX lib/x64)
+else()
+  set(VC_LIB_PATH_SUFFIX lib/x86)
+endif()
+
+find_library(SDL2_IMAGE_LIBRARY
+  NAMES 
+    SDL2_image
+  HINTS
+    ${_SDL2_IMAGE_LIBDIR}
+    ENV SDL2IMAGEDIR
+    ENV SDL2DIR
+  PATH_SUFFIXES 
+    lib 
+    ${VC_LIB_PATH_SUFFIX}
+)
+
+if(SDL2_IMAGE_INCLUDE_DIR AND EXISTS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" AND NOT SDL2_IMAGE_VERSION_STRING)
+  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_IMAGE_INCLUDE_DIR}/SDL_image.h" SDL2_IMAGE_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_MAJOR "${SDL2_IMAGE_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_MINOR "${SDL2_IMAGE_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_IMAGE_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_IMAGE_VERSION_PATCH "${SDL2_IMAGE_VERSION_PATCH_LINE}")
+  set(SDL2_IMAGE_VERSION_STRING ${SDL2_IMAGE_VERSION_MAJOR}.${SDL2_IMAGE_VERSION_MINOR}.${SDL2_IMAGE_VERSION_PATCH})
+  unset(SDL2_IMAGE_VERSION_MAJOR_LINE)
+  unset(SDL2_IMAGE_VERSION_MINOR_LINE)
+  unset(SDL2_IMAGE_VERSION_PATCH_LINE)
+  unset(SDL2_IMAGE_VERSION_MAJOR)
+  unset(SDL2_IMAGE_VERSION_MINOR)
+  unset(SDL2_IMAGE_VERSION_PATCH)
+endif()
+
+set(SDL2_IMAGE_LIBRARIES ${SDL2_IMAGE_LIBRARY})
+set(SDL2_IMAGE_INCLUDE_DIRS ${SDL2_IMAGE_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_image
+                                  REQUIRED_VARS SDL2_IMAGE_LIBRARIES SDL2_IMAGE_INCLUDE_DIRS
+                                  VERSION_VAR SDL2_IMAGE_VERSION_STRING)
+
+mark_as_advanced(SDL2_IMAGE_LIBRARY SDL2_IMAGE_INCLUDE_DIR)

cmake_modules/FindSDL2_mixer.cmake

@@ -0,0 +1,101 @@
+#.rst:
+# FindSDL2_mixer
+# --------------
+#
+# Locate SDL2_mixer library
+#
+# This module defines:
+#
+# ::
+#
+#   SDL2_MIXER_LIBRARIES, the name of the library to link against
+#   SDL2_MIXER_INCLUDE_DIRS, where to find the headers
+#   SDL2_MIXER_FOUND, if false, do not try to link against
+#   SDL2_MIXER_VERSION_STRING - human-readable string containing the version of SDL_mixer
+#
+# $SDL2DIR is an environment variable that would correspond to the
+# ./configure --prefix=$SDL2DIR used in building SDL.
+#
+# Created by Eric Wing.  This was influenced by the FindSDL2.cmake
+# module, but with modifications to recognize OS X frameworks and
+# additional Unix paths (FreeBSD, etc).
+
+#=============================================================================
+# Copyright 2005-2009 Kitware, Inc.
+# Copyright 2012 Benjamin Eikel
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file kitware license.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+if (NOT WIN32)
+    find_package(PkgConfig)
+    if (PKG_CONFIG_FOUND)
+        pkg_check_modules(_SDL2_MIXER SDL2_mixer)
+        set(SDL2_MIXER_STRING ${_SDL2_MIXER_VERSION})
+    endif ()
+endif ()
+
+
+find_path(SDL2_MIXER_INCLUDE_DIR 
+    SDL_mixer.h
+  HINTS
+    ${_SDL2_MIXER_INCLUDEDIR}
+    ENV SDL2MIXERDIR
+    ENV SDL2DIR
+  PATH_SUFFIXES
+    SDL2
+    include/SDL2 
+    include
+)
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+  set(VC_LIB_PATH_SUFFIX lib/x64)
+else()
+  set(VC_LIB_PATH_SUFFIX lib/x86)
+endif()
+
+find_library(SDL2_MIXER_LIBRARY
+  NAMES 
+    SDL2_mixer
+  HINTS
+    ${_SDL2_MIXER_LIBDIR}
+    ENV SDL2MIXERDIR
+    ENV SDL2DIR
+  PATH_SUFFIXES 
+    lib
+    ${VC_LIB_PATH_SUFFIX}
+)
+
+if(SDL2_MIXER_INCLUDE_DIR AND EXISTS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" AND NOT SDL2_MIXER_STRING)
+  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_MIXER_INCLUDE_DIR}/SDL_mixer.h" SDL2_MIXER_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MAJOR "${SDL2_MIXER_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_MINOR "${SDL2_MIXER_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_MIXER_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_MIXER_VERSION_PATCH "${SDL2_MIXER_VERSION_PATCH_LINE}")
+  set(SDL2_MIXER_VERSION_STRING ${SDL2_MIXER_VERSION_MAJOR}.${SDL2_MIXER_VERSION_MINOR}.${SDL2_MIXER_VERSION_PATCH})
+  unset(SDL2_MIXER_VERSION_MAJOR_LINE)
+  unset(SDL2_MIXER_VERSION_MINOR_LINE)
+  unset(SDL2_MIXER_VERSION_PATCH_LINE)
+  unset(SDL2_MIXER_VERSION_MAJOR)
+  unset(SDL2_MIXER_VERSION_MINOR)
+  unset(SDL2_MIXER_VERSION_PATCH)
+endif()
+
+set(SDL2_MIXER_LIBRARIES ${SDL2_MIXER_LIBRARY})
+set(SDL2_MIXER_INCLUDE_DIRS ${SDL2_MIXER_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_mixer
+                                  REQUIRED_VARS SDL2_MIXER_LIBRARIES SDL2_MIXER_INCLUDE_DIRS
+                                  VERSION_VAR SDL2_MIXER_VERSION_STRING)
+
+mark_as_advanced(SDL2_MIXER_LIBRARY SDL2_MIXER_INCLUDE_DIR)

cmake_modules/FindSDL2_ttf.cmake

@@ -0,0 +1,100 @@
+#.rst:
+# FindSDL2_ttf
+# ------------
+#
+# Locate SDL2_ttf library
+#
+# This module defines:
+#
+# ::
+#
+#   SDL2_TTF_LIBRARIES, the name of the library to link against
+#   SDL2_TTF_INCLUDE_DIRS, where to find the headers
+#   SDL2_TTF_FOUND, if false, do not try to link against
+#   SDL2_TTF_VERSION_STRING - human-readable string containing the version of SDL2_ttf
+#
+# $SDL2DIR is an environment variable that would correspond to the
+# ./configure --prefix=$SDL2DIR used in building SDL.
+#
+# Created by Eric Wing.  This was influenced by the FindSDL2.cmake
+# module, but with modifications to recognize OS X frameworks and
+# additional Unix paths (FreeBSD, etc).
+
+#=============================================================================
+# Copyright 2005-2009 Kitware, Inc.
+# Copyright 2012 Benjamin Eikel
+#
+# Distributed under the OSI-approved BSD License (the "License");
+# see accompanying file kitware license.txt for details.
+#
+# This software is distributed WITHOUT ANY WARRANTY; without even the
+# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+# See the License for more information.
+#=============================================================================
+# (To distribute this file outside of CMake, substitute the full
+#  License text for the above reference.)
+
+if (NOT WIN32)
+    find_package(PkgConfig)
+    if (PKG_CONFIG_FOUND)
+        pkg_check_modules(_SDL2_TTF SDL2_ttf)
+        set(SDL2_TTF_VERSION_STRING ${_SDL2_TTF_VERSION})
+    endif ()
+endif ()
+
+find_path(SDL2_TTF_INCLUDE_DIR
+    SDL_ttf.h
+  HINTS
+    ${_SDL2_TTF_INCLUDEDIR}
+    ENV SDL2TTFDIR
+    ENV SDL2DIR
+  PATH_SUFFIXES
+    SDL2
+    include/SDL2
+    include
+)
+
+if(CMAKE_SIZEOF_VOID_P EQUAL 8)
+  set(VC_LIB_PATH_SUFFIX lib/x64)
+else()
+  set(VC_LIB_PATH_SUFFIX lib/x86)
+endif()
+
+find_library(SDL2_TTF_LIBRARY
+  NAMES 
+    SDL2_ttf
+  HINTS
+    ${_SDL2_TTF_LIBDIR}
+    ENV SDL2TTFDIR
+    ENV SDL2DIR
+  PATH_SUFFIXES 
+    lib 
+    ${VC_LIB_PATH_SUFFIX}
+)
+
+if(SDL2_TTF_INCLUDE_DIR AND EXISTS "${SDL2_TTF_INCLUDE_DIR}/SDL_ttf.h" AND NOT SDL2_TTF_VERSION_STRING)
+  file(STRINGS "${SDL2_TTF_INCLUDE_DIR}/SDL_ttf.h" SDL2_TTF_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL_TTF_MAJOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_TTF_INCLUDE_DIR}/SDL_ttf.h" SDL2_TTF_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL_TTF_MINOR_VERSION[ \t]+[0-9]+$")
+  file(STRINGS "${SDL2_TTF_INCLUDE_DIR}/SDL_ttf.h" SDL2_TTF_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL_TTF_PATCHLEVEL[ \t]+[0-9]+$")
+  string(REGEX REPLACE "^#define[ \t]+SDL_TTF_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_TTF_VERSION_MAJOR "${SDL2_TTF_VERSION_MAJOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_TTF_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_TTF_VERSION_MINOR "${SDL2_TTF_VERSION_MINOR_LINE}")
+  string(REGEX REPLACE "^#define[ \t]+SDL_TTF_PATCHLEVEL[ \t]+([0-9]+)$" "\\1" SDL2_TTF_VERSION_PATCH "${SDL2_TTF_VERSION_PATCH_LINE}")
+  set(SDL2_TTF_VERSION_STRING ${SDL2_TTF_VERSION_MAJOR}.${SDL2_TTF_VERSION_MINOR}.${SDL2_TTF_VERSION_PATCH})
+  unset(SDL2_TTF_VERSION_MAJOR_LINE)
+  unset(SDL2_TTF_VERSION_MINOR_LINE)
+  unset(SDL2_TTF_VERSION_PATCH_LINE)
+  unset(SDL2_TTF_VERSION_MAJOR)
+  unset(SDL2_TTF_VERSION_MINOR)
+  unset(SDL2_TTF_VERSION_PATCH)
+endif()
+
+set(SDL2_TTF_LIBRARIES ${SDL2_TTF_LIBRARY})
+set(SDL2_TTF_INCLUDE_DIRS ${SDL2_TTF_INCLUDE_DIR})
+
+include(FindPackageHandleStandardArgs)
+
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2_ttf
+                                  REQUIRED_VARS SDL2_TTF_LIBRARIES SDL2_TTF_INCLUDE_DIRS
+                                  VERSION_VAR SDL2_TTF_VERSION_STRING)
+
+mark_as_advanced(SDL2_TTF_LIBRARY SDL2_TTF_INCLUDE_DIR)

cmake_modules/kitware license.txt

@@ -0,0 +1,57 @@
+CMake - Cross Platform Makefile Generator
+Copyright 2000-2014 Kitware, Inc.
+Copyright 2000-2011 Insight Software Consortium
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions
+are met:
+
+* Redistributions of source code must retain the above copyright
+  notice, this list of conditions and the following disclaimer.
+
+* Redistributions in binary form must reproduce the above copyright
+  notice, this list of conditions and the following disclaimer in the
+  documentation and/or other materials provided with the distribution.
+
+* Neither the names of Kitware, Inc., the Insight Software Consortium,
+  nor the names of their contributors may be used to endorse or promote
+  products derived from this software without specific prior written
+  permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+------------------------------------------------------------------------------
+
+The above copyright and license notice applies to distributions of
+CMake in source and binary form.  Some source files contain additional
+notices of original copyright by their contributors; see each source
+for details.  Third-party software packages supplied with CMake under
+compatible licenses provide their own copyright notices documented in
+corresponding subdirectories.
+
+------------------------------------------------------------------------------
+
+CMake was initially developed by Kitware with the following sponsorship:
+
+ * National Library of Medicine at the National Institutes of Health
+   as part of the Insight Segmentation and Registration Toolkit (ITK).
+
+ * US National Labs (Los Alamos, Livermore, Sandia) ASC Parallel
+   Visualization Initiative.
+
+ * National Alliance for Medical Image Computing (NAMIC) is funded by the
+   National Institutes of Health through the NIH Roadmap for Medical Research,
+   Grant U54 EB005149.
+
+ * Kitware, Inc.