Fails to build with sdl2-compat

[v1993]

I'm getting implicit declaration errors after updating from SDL2 to SDL3 + sdl2-compat, e.g.

share/audio.c: In function ‘voice_step’:
share/audio.c:65:32: error: implicit declaration of function ‘pow’ [-Wimplicit-function-declaration]
   65 | #define LOG_VOLUME(v) ((float) pow((double) (v), 2.0))
      |                                ^~~
share/audio.c:105:40: note: in expansion of macro ‘LOG_VOLUME’
  105 |                     short M = (short) (LOG_VOLUME(V->amp) * volume * buffer[i]);
      |                                        ^~~~~~~~~~
share/audio.c:30:1: note: include ‘<math.h>’ or provide a declaration of ‘pow’
   29 | #include "log.h"
  +++ |+#include <math.h>
   30 | 
share/glext.c: In function ‘glext_init’:
share/glext.c:131:5: error: implicit declaration of function ‘memset’ [-Wimplicit-function-declaration]
  131 |     memset(&gli, 0, sizeof (struct gl_info));
      |     ^~~~~~
share/glext.c:20:1: note: include ‘<string.h>’ or provide a declaration of ‘memset’
   19 | #include "log.h"
  +++ |+#include <string.h>
   20 | 
share/glext.c:131:5: warning: incompatible implicit declaration of built-in function ‘memset’ [-Wbuiltin-declaration-mismatch]
  131 |     memset(&gli, 0, sizeof (struct gl_info));
      |     ^~~~~~
share/glext.c:131:5: note: include ‘<string.h>’ or provide a declaration of ‘memset’
share/glext.c:106:5: error: implicit declaration of function ‘memcpy’ [-Wimplicit-function-declaration]
  106 |     memcpy(&fun, &ptr, sizeof (void *));                 \
      |     ^~~~~~

[parasti]

Compiler version?

[parasti]

Actually I guess it's just that we missed some includes and SDL used to include them incidentally but no longer does. I'll commit a fix later.