On Alpine, SDL is built with directfb support and this triggers warnings during QEMU build
In file included from /usr/include/directfb/direct/thread.h:38, from /usr/include/directfb/direct/debug.h:43, from /usr/include/directfb/direct/interface.h:36, from /usr/include/directfb/directfb.h:49, from /usr/include/SDL2/SDL_syswm.h:80, from /builds/berrange/qemu/include/ui/sdl2.h:8, from ../ui/sdl2-gl.c:31: /usr/include/directfb/direct/os/waitqueue.h:41:25: error: redundant redeclaration of 'direct_waitqueue_init' [-Werror=redundant-decls] 41 | DirectResult DIRECT_API direct_waitqueue_init ( DirectWaitQueue *queue ); | ^~~~~~~~~~~~~~~~~~~~~ Reviewed-by: Philippe Mathieu-Daudé <phi...@redhat.com> Signed-off-by: Daniel P. Berrangé <berra...@redhat.com> --- include/ui/sdl2.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/ui/sdl2.h b/include/ui/sdl2.h index f85c117a78..0330978df8 100644 --- a/include/ui/sdl2.h +++ b/include/ui/sdl2.h @@ -5,7 +5,18 @@ #undef WIN32_LEAN_AND_MEAN #include <SDL.h> + +/* with Alpine / muslc SDL headers pull in directfb headers + * which in turn trigger warning about redundant decls for + * direct_waitqueue_deinit. + */ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wredundant-decls" + #include <SDL_syswm.h> + +#pragma GCC diagnostic pop + #ifdef CONFIG_SDL_IMAGE # include <SDL_image.h> #endif -- 2.33.1