fails with gcc 15

[pgajdos]

/home/abuild/rpmbuild/BUILD/yamagi-quake2-ctf-1.10-build/quake2-ctf-1.10/src/menu/../header/shared.h:40:15: error: cannot use keyword ‘false’ as enumeration constant
   40 | typedef enum {false, true}  qboolean;
      |               ^~~~~
/home/abuild/rpmbuild/BUILD/yamagi-quake2-ctf-1.10-build/quake2-ctf-1.10/src/menu/../header/shared.h:40:15: note: ‘false’ is a keyword with ‘-std=c23’ onwards

Perhaps:

#include <stdbool.h>
typedef bool qboolean;

would do the trick?

[Yamagi]

In this context true and false are enum values. This was legal up to now, with the new C23 both became keywords. I think that your proposed fix isn't wrong, the question is why gcc 15 selects C23. The Makefile forces -std=gnu99: https://github.com/yquake2/ctf/blob/master/Makefile#L91

Can you build with make VERBOSE=1? It will print the complete compiler call.

[pgajdos]

The full log (of the build with a patch fixing build with gcc15) is here:
https://build.opensuse.org/package/live_build_log/home:rguenther:plgrnd/yamagi-quake2-ctf/openSUSE_Factory/x86_64
I guess CFLAGS are set by %cmake rpm macro, which calls cmake with -DCMAKE_C_FLAGS.

[Yamagi]

Other than the Makefile the CMakeBuild.txt didn't force a C standard, so we end up with the gcc default. I have pushed a fix which forces gnu99. Can you try again?

[Yamagi]

I have pushed a proper fix to yquake2 itself, xatrix, rogue, ctf and even zaero. They all build with gcc and clang in C23 mode now.