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Works around https://github.com/libsdl-org/SDL/issues/3665 by using sdl2-config.cmake.in from https://github.com/libsdl-org/SDL/pull/4320pull/1706/head
Gleb Mazovetskiy
5 years ago
committed by
Anders Jenbo
4 changed files with 127 additions and 5 deletions
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# We copy this for mingw builds to work around https://github.com/libsdl-org/SDL/issues/3665 |
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# Taken from https://github.com/libsdl-org/SDL/pull/4320 |
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# sdl2 cmake project-config input for ./configure scripts |
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set(prefix "@prefix@") |
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set(exec_prefix "@exec_prefix@") |
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set(libdir "@libdir@") |
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set(includedir "@includedir@") |
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set(SDL2_PREFIX "${prefix}") |
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set(SDL2_EXEC_PREFIX "${exec_prefix}") |
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set(SDL2_LIBDIR "${libdir}") |
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set(SDL2_INCLUDE_DIRS "${includedir}/SDL2") |
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set(SDL2_LIBRARIES "-L${SDL2_LIBDIR} @SDL_RLD_FLAGS@ @SDL_LIBS@") |
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string(STRIP "${SDL2_LIBRARIES}" SDL2_LIBRARIES) |
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if(NOT TARGET SDL2::SDL2) |
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# provide SDL2::SDL2, SDL2::SDL2main and SDL2::SDL2-static targets, like SDL2Config.cmake does, for compatibility |
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# Remove -lSDL2 as that is handled by CMake, note the space at the end so it does not replace e.g. -lSDL2main |
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# This may require "libdir" beeing set (from above) |
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string(REPLACE "-lSDL2 " "" SDL2_EXTRA_LINK_FLAGS "@SDL_RLD_FLAGS@ @SDL_LIBS@ ") |
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# also get rid of -lSDL2main, if you want to link against that use both SDL2::SDL2main and SDL2::SDL2 (in that order) |
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# (SDL2Config.cmake has the same behavior) |
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string(REPLACE "-lSDL2main" "" SDL2_EXTRA_LINK_FLAGS ${SDL2_EXTRA_LINK_FLAGS}) |
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string(STRIP "${SDL2_EXTRA_LINK_FLAGS}" SDL2_EXTRA_LINK_FLAGS) |
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string(REPLACE "-lSDL2 " "" SDL2_EXTRA_LINK_FLAGS_STATIC "@SDL_STATIC_LIBS@ ") |
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string(STRIP "${SDL2_EXTRA_LINK_FLAGS_STATIC}" SDL2_EXTRA_LINK_FLAGS_STATIC) |
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if(WIN32 AND NOT MSVC) |
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# MINGW needs very special handling, because the link order must be exactly -lmingw32 -lSDL2main -lSDL2 -mwindows |
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# for it to work at all; a normal SHARED IMPORTED or STATIC IMPORTED library always puts itself first |
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# so handle this like a header-only lib and put everything in INTERFACE_LINK_LIBRARIES |
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add_library(SDL2::SDL2 INTERFACE IMPORTED) |
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set_target_properties(SDL2::SDL2 PROPERTIES |
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}" |
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INTERFACE_LINK_LIBRARIES "-L${SDL2_LIBDIR} -lmingw32 -lSDL2 -mwindows") |
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add_library(SDL2::SDL2main INTERFACE IMPORTED) |
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set_target_properties(SDL2::SDL2main PROPERTIES |
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INTERFACE_LINK_LIBRARIES "-L${SDL2_LIBDIR} -lmingw32 -lSDL2main") |
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else() # (not WIN32) or MSVC |
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add_library(SDL2::SDL2 SHARED IMPORTED) |
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set_target_properties(SDL2::SDL2 PROPERTIES |
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}" |
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IMPORTED_LINK_INTERFACE_LANGUAGES "C" |
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IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_SHARED_LIBRARY_PREFIX}SDL2${CMAKE_SHARED_LIBRARY_SUFFIX}") |
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if(MSVC) |
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# This file is generated when building SDL2 with autotools and MinGW, and MinGW/dlltool |
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# isn't able to generate .lib files that are usable by recent MSVC versions |
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# (something about "module unsafe for SAFESEH"; SAFESEH is enabled by default in MSVC). |
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# The .lib file for SDL2.dll *could* be generated with `gendef SDL2.dll` and then |
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# `lib.exe /machine:x86 /def:SDL2.def /out:SDL2.lib` (or /machine:amd64) |
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# but that requires lib.exe from a Visual Studio installation - and that still doesn't |
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# give you a static SDL2main.lib that you'll most probably need (unless you don't use SDL2main) |
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# Note that when building SDL2 with CMake and MSVC, the result works with both MinGW and MSVC. |
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message(FATAL_ERROR, "This build of libSDL2 only supports MinGW, not MSVC (Visual C++), because it lacks .lib files!") |
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# MSVC needs SDL2.lib set as IMPORTED_IMPLIB to link against (comment out message() call above if you added SDL2.lib yourself) |
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set_target_properties(SDL2::SDL2 PROPERTIES IMPORTED_IMPLIB "${SDL2_LIBDIR}/SDL2.lib") |
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else() |
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# this mustn't be set for MSVC, so do it here in an extra call here |
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set_target_properties(SDL2::SDL2 PROPERTIES INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS}") |
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endif() |
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add_library(SDL2::SDL2main STATIC IMPORTED) |
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set_target_properties(SDL2::SDL2main PROPERTIES |
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IMPORTED_LINK_INTERFACE_LANGUAGES "C" |
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IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2main${CMAKE_STATIC_LIBRARY_SUFFIX}") |
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endif() # (not WIN32) or MSVC |
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add_library(SDL2::SDL2-static STATIC IMPORTED) |
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set_target_properties(SDL2::SDL2-static PROPERTIES |
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INTERFACE_INCLUDE_DIRECTORIES "${SDL2_INCLUDE_DIRS}" |
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IMPORTED_LINK_INTERFACE_LANGUAGES "C" |
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IMPORTED_LOCATION "${SDL2_LIBDIR}/${CMAKE_STATIC_LIBRARY_PREFIX}SDL2${CMAKE_STATIC_LIBRARY_SUFFIX}" |
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INTERFACE_LINK_LIBRARIES "${SDL2_EXTRA_LINK_FLAGS_STATIC}") |
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endif() # NOT TARGET SDL2::SDL2 |
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