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meson.build: Use -Wno-undef only for SDL2 versions that need it

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There is no need to disable this useful compiler warning for
all versions of the SDL. Unfortunately, various versions are
buggy (beside SDL 2.0.8, the version 2.26.0 and 2.26.1 are
broken, too, see https://github.com/libsdl-org/SDL/issues/6619 ),
but we can use a simple compiler check to see whether we need
the -Wno-undef or not.

This also enables the printing of the version number with
good versions of the SDL in the summary of the meson output
again.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20230605114523.282987-1-thuth@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Thomas Huth 2023-06-05 13:45:23 +02:00 committed by Paolo Bonzini
parent aece7238c4
commit 6da5f22b65
1 changed files with 10 additions and 4 deletions
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14
meson.build
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@ -1273,10 +1273,16 @@ if not get_option('sdl').auto() or have_system
sdl_image = not_found
endif
if sdl.found()
# work around 2.0.8 bug
sdl = declare_dependency(compile_args: '-Wno-undef',
dependencies: sdl,
version: sdl.version())
# Some versions of SDL have problems with -Wundef
if not cc.compiles('''
#include <SDL.h>
#include <SDL_syswm.h>
int main(int argc, char *argv[]) { return 0; }
''', dependencies: sdl, args: '-Werror=undef')
sdl = declare_dependency(compile_args: '-Wno-undef',
dependencies: sdl,
version: sdl.version())
endif
sdl_image = dependency('SDL2_image', required: get_option('sdl_image'),
method: 'pkg-config')
else