You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
200 lines
7.4 KiB
200 lines
7.4 KiB
# Distributed under the OSI-approved BSD 3-Clause License. See accompanying |
|
# file Copyright.txt or https://cmake.org/licensing for details. |
|
|
|
#.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 -lSDLmain 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 (SDL.dll, libsdl.so, SDL.framework, etc). Set |
|
# SDL2_LIBRARY_TEMP to point to your SDL library, and configure again. |
|
# Similarly, if you see an empty SDLMAIN_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. |
|
# |
|
# Note that the header path has changed from SDL/SDL.h to just SDL.h |
|
# This needed to change because "proper" SDL convention is #include |
|
# "SDL.h", not <SDL/SDL.h>. This is done for portability reasons |
|
# because not all systems place things in SDL/ (see FreeBSD). |
|
|
|
if(NOT SDL2_DIR) |
|
set(SDL2_DIR "" CACHE PATH "SDL2 directory") |
|
endif() |
|
|
|
find_path(SDL2_INCLUDE_DIR SDL.h |
|
HINTS |
|
ENV SDL2DIR |
|
${SDL2_DIR} |
|
PATH_SUFFIXES SDL2 |
|
# path suffixes to search inside ENV{SDL2DIR} |
|
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 |
|
ENV SDL2DIR |
|
${SDL2_DIR} |
|
PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} |
|
) |
|
|
|
# Hide this cache variable from the user, it's an internal implementation |
|
# detail. The documented library variable for the user is SDL2_LIBRARY |
|
# which is derived from SDL2_LIBRARY_TEMP further below. |
|
set_property(CACHE SDL2_LIBRARY_TEMP PROPERTY TYPE INTERNAL) |
|
|
|
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 |
|
${SDL2_DIR} |
|
PATH_SUFFIXES lib ${VC_LIB_PATH_SUFFIX} |
|
PATHS |
|
/sw |
|
/opt/local |
|
/opt/csw |
|
/opt |
|
) |
|
endif() |
|
endif() |
|
|
|
# SDL may require threads on your system. |
|
# The Apple build may not need an explicit flag because one of the |
|
# frameworks may already provide it. |
|
# But for non-OSX systems, I will use the CMake Threads package. |
|
if(NOT APPLE) |
|
find_package(Threads) |
|
endif() |
|
|
|
# MinGW needs an additional link flag, -mwindows |
|
# It's total link flags should look like -lmingw32 -lSDLmain -lSDL -mwindows |
|
if(MINGW) |
|
set(MINGW32_LIBRARY mingw32 "-mwindows" CACHE STRING "link flags for MinGW") |
|
endif() |
|
|
|
if(SDL2_LIBRARY_TEMP) |
|
# For SDLmain |
|
if(SDL2MAIN_LIBRARY AND NOT SDL2_BUILDING_LIBRARY) |
|
list(FIND SDL2_LIBRARY_TEMP "${SDLMAIN_LIBRARY}" _SDL2_MAIN_INDEX) |
|
if(_SDL2_MAIN_INDEX EQUAL -1) |
|
set(SDL2_LIBRARY_TEMP "${SDLMAIN_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 ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL Library can be found") |
|
endif() |
|
|
|
if(SDL2_INCLUDE_DIR AND EXISTS "${SDL2_INCLUDE_DIR}/SDL2_version.h") |
|
file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_MAJOR_LINE REGEX "^#define[ \t]+SDL2_MAJOR_VERSION[ \t]+[0-9]+$") |
|
file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_MINOR_LINE REGEX "^#define[ \t]+SDL2_MINOR_VERSION[ \t]+[0-9]+$") |
|
file(STRINGS "${SDL2_INCLUDE_DIR}/SDL2_version.h" SDL2_VERSION_PATCH_LINE REGEX "^#define[ \t]+SDL2_PATCHLEVEL[ \t]+[0-9]+$") |
|
string(REGEX REPLACE "^#define[ \t]+SDL2_MAJOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MAJOR "${SDL2_VERSION_MAJOR_LINE}") |
|
string(REGEX REPLACE "^#define[ \t]+SDL2_MINOR_VERSION[ \t]+([0-9]+)$" "\\1" SDL2_VERSION_MINOR "${SDL2_VERSION_MINOR_LINE}") |
|
string(REGEX REPLACE "^#define[ \t]+SDL2_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} ${SDL2MAIN_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) |