How to compile against the SDL backend

[Sqvid]

I am currently facing Issue #3763 which is possibly due to the glfw backend. This made me wonder how I could go about linking against SDL instead. Though this was announced in the changelog, there don't seem to be any instructions on how to do this. I would greatly appreciate any help. Thank you.

[gen2brain]

Just define -DPLATFORM_DESKTOP_SDL and since you are on Linux, you can just use the output of pkg-config --cflags --libs sdl2 when building. I just tried your example with Go bindings, I do not get the warning though,

$ go build
$ ./t
ScreenWidth: 10, ScreenHeight: 10
RenderWidth: 10, RenderHeight: 10

$ go build -tags sdl
$ ./t
ScreenWidth: 400, ScreenHeight: 400
RenderWidth: 10, RenderHeight: 10

[Sqvid]

Thank you very much for your reply, and thank you for also testing my issue. Yes it does seem specific to my system. I am unsure how to track down the cause of the bug. I suppose it could be glfw, or my Wayland window manager (sway).

[gen2brain]

Well, for me this happens in the X11 session, with Openbox, so only the warning seems related to your WM but not the actual result. Also, note that GLFW builds by default for X11, you would need one build for _GLFW_WAYLAND and one for _GLFW_X11. I think only in the next version it will decide what to use on runtime.

[Sqvid]

I tried passing -DPLATFORM_DESKTOP_SDL=ON but it seems to be ignored by cmake. I am also passing -DGRAPHICS=GRAPHICS_API_SDL. any ideas?

CMake Warning:
Manually-specified variables were not used by the project:

PLATFORM_DESKTOP_SDL

[Peter0x44]

@Sqvid Raylib's CMake setup does not currently support building against SDL, you must use the Makefile in raylib/src.
My current strategy is to make the following changes to the Makefile:

-SDL_INCLUDE_PATH      ?= $(RAYLIB_SRC_PATH)/external/SDL2/include
-SDL_LIBRARY_PATH      ?= $(RAYLIB_SRC_PATH)/external/SDL2/lib
+SDL_INCLUDE_PATH      ?= $(shell pkg-config --cflags sdl2)
+SDL_LIBRARY_PATH      ?= $(shell pkg-config --libs sdl2)
-    INCLUDE_PATHS += -I$(SDL_INCLUDE_PATH)
+    INCLUDE_PATHS += $(SDL_INCLUDE_PATH)
-    LDFLAGS += -L$(SDL_LIBRARY_PATH)
+    LDFLAGS += $(SDL_LIBRARY_PATH)

then build with make PLATFORM=PLATFORM_DESKTOP_SDL, and also run make clean first, if necessary.
This should create a libraylib.a using SDL.

Then, you can build your code against it with:
eval cc program.c -I path/to/raylib/src path/to/libraylib.a $(pkg-config --libs sdl2)

[Sqvid]

Thank you very much. I was indeed able to compile raylib against SDL2 using your instructions.

This does also bypass #3763, though I wish I didn't require this work around. I'll try and locate which glfw calls ought to be reported upstream.