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Fix build on PowerPC with uClibc

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PPC_FEATURE_HAS_ALTIVEC is not defined by all C libraries. The following
error was raised while testing SDL3 in Buildroot with a PowerPC toolchain
using uClibc-ng:

  src/cpuinfo/SDL_cpuinfo.c: In function 'SDL_GetAltiVecFeatures':
  src/cpuinfo/SDL_cpuinfo.c:351:37: error: 'PPC_FEATURE_HAS_ALTIVEC' undeclared (first use in this function)
    351 |     altivec = getauxval(AT_HWCAP) & PPC_FEATURE_HAS_ALTIVEC;
        |                                     ^~~~~~~~~~~~~~~~~~~~~~~

Provide a fallback definition when it is not defined.

Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
This commit is contained in:
Dario Binacchi
2026-08-23 16:09:24 +02:00
committed by Sam Lantinga
parent 8b1e4aa41b
commit e721af3baf
1 changed files with 4 additions and 0 deletions
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4
src/cpuinfo/SDL_cpuinfo.c
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@@ -80,6 +80,10 @@
#include <sys/auxv.h>
#endif
#ifndef PPC_FEATURE_HAS_ALTIVEC
#define PPC_FEATURE_HAS_ALTIVEC 0x10000000
#endif
#ifdef SDL_PLATFORM_RISCOS
#include <kernel.h>
#include <swis.h>