From 80ba522b20f34e327af2ecdf207d05b143a34c8a Mon Sep 17 00:00:00 2001 From: "alexey.lysiuk" Date: Sun, 2 May 2021 21:47:50 +0300 Subject: [PATCH] - brought back old SDL2 CMake module https://forum.zdoom.org/viewtopic.php?t=72152 --- cmake/FindSDL2.cmake | 172 +++++++++++++++++++++++++++++++++++++++++++ src/CMakeLists.txt | 10 +-- 2 files changed, 177 insertions(+), 5 deletions(-) create mode 100644 cmake/FindSDL2.cmake diff --git a/cmake/FindSDL2.cmake b/cmake/FindSDL2.cmake new file mode 100644 index 0000000000..02c6bba067 --- /dev/null +++ b/cmake/FindSDL2.cmake @@ -0,0 +1,172 @@ +# Distributed under the OSI-approved BSD 3-Clause License. See accompanying +# file Copyright.txt or https://cmake.org/licensing for details. + +# 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 SDL2 +# SDL2_INCLUDE_DIR, where to find SDL.h +# +# This module responds to the 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 the proper link flags +# as part of the returned SDL2_LIBRARY variable. +# +# Don't forget to include SDL2main.h and SDL2main.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 SDL2 library +# (SDL2.dll, libsdl2.so, SDL2.framework, etc). +# Set SDL2_LIBRARY_TEMP to point to your SDL2 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 SDL2. +# 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" SDL2 guidelines. +# Added a search for SDL2main 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 SDL2/SDL.h to just SDL.h +# This needed to change because "proper" SDL2 convention +# is #include "SDL.h", not . This is done for portability +# reasons because not all systems place things in SDL2/ (see FreeBSD). +# +# Ported by Johnny Patterson. This is a literal port for SDL2 of the FindSDL.cmake +# module with the minor edit of changing "SDL" to "SDL2" where necessary. This +# was not created for redistribution, and exists temporarily pending official +# SDL2 CMake modules. + +FIND_PATH(SDL2_INCLUDE_DIR SDL.h + HINTS + $ENV{SDL2DIR} + PATH_SUFFIXES include/SDL2 include + PATHS + ~/Library/Frameworks + /Library/Frameworks + /usr/local/include/SDL2 + /usr/include/SDL2 + /sw # Fink + /opt/local # DarwinPorts + /opt/csw # Blastwave + /opt + /boot/system/develop/headers/SDL2 #Hiaku OS +) +#MESSAGE("SDL2_INCLUDE_DIR is ${SDL2_INCLUDE_DIR}") + +FIND_LIBRARY(SDL2_LIBRARY_TEMP + NAMES SDL2 + HINTS + $ENV{SDL2DIR} + PATH_SUFFIXES lib64 lib + PATHS + /sw + /opt/local + /opt/csw + /opt + /system/lib #Hiaku OS +) + +#MESSAGE("SDL2_LIBRARY_TEMP is ${SDL2_LIBRARY_TEMP}") + +IF(NOT SDL2_BUILDING_LIBRARY) + IF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework") + # Non-OS X framework versions expect you to also dynamically link to + # SDL2main. This is mainly for Windows and OS X. Other (Unix) platforms + # seem to provide SDL2main for compatibility even though they don't + # necessarily need it. + FIND_LIBRARY(SDL2MAIN_LIBRARY + NAMES SDL2main + HINTS + $ENV{SDL2DIR} + PATH_SUFFIXES lib64 lib + PATHS + /sw + /opt/local + /opt/csw + /opt + ) + ENDIF(NOT ${SDL2_INCLUDE_DIR} MATCHES ".framework") +ENDIF(NOT SDL2_BUILDING_LIBRARY) + +# SDL2 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(NOT APPLE) + +# MinGW needs an additional library, mwindows +# It's total link flags should look like -lmingw32 -lSDL2main -lSDL2 -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(MINGW) + +SET(SDL2_FOUND "NO") +IF(SDL2_LIBRARY_TEMP) + # For SDL2main + IF(NOT SDL2_BUILDING_LIBRARY) + IF(SDL2MAIN_LIBRARY) + SET(SDL2_LIBRARY_TEMP ${SDL2MAIN_LIBRARY} ${SDL2_LIBRARY_TEMP}) + ENDIF(SDL2MAIN_LIBRARY) + ENDIF(NOT SDL2_BUILDING_LIBRARY) + + # For OS X, SDL2 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(APPLE) + + # 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(NOT APPLE) + + # For MinGW library + IF(MINGW) + SET(SDL2_LIBRARY_TEMP ${MINGW32_LIBRARY} ${SDL2_LIBRARY_TEMP}) + ENDIF(MINGW) + + # Set the final string here so the GUI reflects the final state. + SET(SDL2_LIBRARY ${SDL2_LIBRARY_TEMP} CACHE STRING "Where the SDL2 Library can be found") + # Set the temp variable to INTERNAL so it is not seen in the CMake GUI + SET(SDL2_LIBRARY_TEMP "${SDL2_LIBRARY_TEMP}" CACHE INTERNAL "") + + SET(SDL2_FOUND "YES") +ENDIF(SDL2_LIBRARY_TEMP) + +INCLUDE(FindPackageHandleStandardArgs) + +FIND_PACKAGE_HANDLE_STANDARD_ARGS(SDL2 + REQUIRED_VARS SDL2_LIBRARY SDL2_INCLUDE_DIR) diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt index 77378bc488..22841cbd4d 100644 --- a/src/CMakeLists.txt +++ b/src/CMakeLists.txt @@ -177,9 +177,9 @@ else() # Non-Windows version also needs SDL except native OS X backend if( NOT APPLE OR NOT OSX_COCOA_BACKEND ) - find_package( SDL2 REQUIRED CONFIG ) + find_package( SDL2 REQUIRED ) - set( CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES}" "${SDL2_INCLUDE_DIRS}" ) + set( CMAKE_REQUIRED_INCLUDES "${CMAKE_REQUIRED_INCLUDES}" "${SDL2_INCLUDE_DIR}" ) CHECK_CXX_SOURCE_COMPILES( "#include #if SDL_VERSION_ATLEAST(2, 0, 6) int main() {} @@ -188,9 +188,9 @@ else() if ( NOT SDL2_MIN_VERSION ) message( SEND_ERROR "Only SDL 2.0.6 or later is supported." ) endif() - - include_directories( "${SDL2_INCLUDE_DIRS}" ) - set( ZDOOM_LIBS ${ZDOOM_LIBS} "${SDL2_LIBRARIES}" ) + + include_directories( "${SDL2_INCLUDE_DIR}" ) + set( ZDOOM_LIBS ${ZDOOM_LIBS} "${SDL2_LIBRARY}" ) endif() find_path( FPU_CONTROL_DIR fpu_control.h )