[SDL2] Use pre-built avif/libjxl libraries in autotools configuration

[madebr]

The autotools detects libavif/libjx using pkg-config and custom build tests here:

SDL_image/configure.ac

Lines 310 to 320 in 251cdd8

	PKG_CHECK_MODULES([LIBAVIF], [libavif >= 0.9.3], [dnl
	have_avif_hdr=yes
	have_avif_lib=yes
	have_avif_pc=yes
	], [dnl
	save_LIBS="$LIBS"
	LIBS="-lavif"
	AC_LANG_PUSH([C])
	AC_MSG_CHECKING([for libavif >= 0.9.3])
	AC_LINK_IFELSE([AC_LANG_PROGRAM([[
	#include <avif/avif.h>

Is it possible to re-use the pre-built win32 binaries in VisualC/external?

Configuring with LIBAVIF_CFLAGS=/path/to/SDL2_image/VisualC/external/include LIBAVIF_LDFLAGS= does still fail the libavif tests.

@sezero

[slouken]

FYI, this is a blocker for an SDL_image release, so we should resolve this.

[madebr]

Creating import libraries, and configuring with 'LIBAVIF_CFLAGS=-I/home/maarten/projects/SDL_image/VisualC/external/include' 'LIBAVIF_LDFLAGS=-L/home/maarten/projects/SDL_image/VisualC/external/optional/x86' also does not work

avif-implibs.tar.gz

I created the implibs using:

x86_64-w64-mingw32-dlltool --input-def libavif-16.def --output-lib libavif.dll.a
i686-w64-mingw32-dlltool --input-def libavif-16.def --output-lib libavif.dll.a

[madebr]

I think I got it working with:

        "LDFLAGS=-L/src/SDL_image/VisualC/external/optional/x86"
        "LIBAVIF_CFLAGS=-I/src/SDL_image/VisualC/external/include"
        "LIBAVIF_LIBS=-L/src/SDL_image/VisualC/external/optional/x86"
        "LIBWEBPDEMUX_CFLAGS=-I/src/SDL_image/VisualC/external/include"
        "LIBWEBPDEMUX_LIBS=-L/src/SDL_image/VisualC/external/optional/x86"
        "LIBWEBP_CFLAGS=-I/src/SDL_image/VisualC/external/include"
        "LIBWEBP_LIBS=-L/src/SDL_image/VisualC/external/optional/x86"

[sezero]

I think I got it working with:

        "LDFLAGS=-L/src/SDL_image/VisualC/external/optional/x86"
        "LIBAVIF_CFLAGS=-I/src/SDL_image/VisualC/external/include"
        "LIBAVIF_LIBS=-L/src/SDL_image/VisualC/external/optional/x86"
        "LIBWEBPDEMUX_CFLAGS=-I/src/SDL_image/VisualC/external/include"
        "LIBWEBPDEMUX_LIBS=-L/src/SDL_image/VisualC/external/optional/x86"
        "LIBWEBP_CFLAGS=-I/src/SDL_image/VisualC/external/include"
        "LIBWEBP_LIBS=-L/src/SDL_image/VisualC/external/optional/x86"

Yes, that should work I think

FYI, this is a blocker for an SDL_image release, so we should resolve this.

Why is this a blocker? Are the sdl2 branch releases going to be made through CI artifacts?

[sezero]

FYI, this is a blocker for an SDL_image release, so we should resolve this.

P.S.: The actual blocker is #450 (tests failing against libjxl >= 0.10.0), which I think we should ask libjxl guys for help

[madebr]

Yes, that should work I think

It works! Proven by ci :)

FYI, this is a blocker for an SDL_image release, so we should resolve this.

Why is this a blocker? Are the sdl2 branch releases going to be made through CI artifacts?

Yes, I've backported the scripts from the main branch, now using autotools.

It was a blocker because without it, the mingw binaries would be built without avif/webp/tiff support.