cpu: recognise only cpu flag names pertinent to the architecture

Signed-off-by: Mans Rullgard <mans@mansr.com>

libavutil/cpu.c

@@ -63,7 +63,9 @@ int av_parse_cpu_flags(const char *s)
 #define CPUFLAG_FMA4     (AV_CPU_FLAG_FMA4     | CPUFLAG_AVX)
     static const AVOption cpuflags_opts[] = {
         { "flags"   , NULL, 0, AV_OPT_TYPE_FLAGS, { 0 }, INT64_MIN, INT64_MAX, .unit = "flags" },
+#if   ARCH_PPC
         { "altivec" , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ALTIVEC  },    .unit = "flags" },
+#elif ARCH_X86
         { "mmx"     , NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_MMX      },    .unit = "flags" },
         { "mmx2"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_MMX2         },    .unit = "flags" },
         { "sse"     , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_SSE          },    .unit = "flags" },
@@ -80,14 +82,14 @@ int av_parse_cpu_flags(const char *s)
         { "fma4"    , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_FMA4         },    .unit = "flags" },
         { "3dnow"   , NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_3DNOW        },    .unit = "flags" },
         { "3dnowext", NULL, 0, AV_OPT_TYPE_CONST, { CPUFLAG_3DNOWEXT     },    .unit = "flags" },
-
+#elif ARCH_ARM
         { "armv5te",  NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ARMV5TE  },    .unit = "flags" },
         { "armv6",    NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ARMV6    },    .unit = "flags" },
         { "armv6t2",  NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_ARMV6T2  },    .unit = "flags" },
         { "vfp",      NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_VFP      },    .unit = "flags" },
         { "vfpv3",    NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_VFPV3    },    .unit = "flags" },
         { "neon",     NULL, 0, AV_OPT_TYPE_CONST, { AV_CPU_FLAG_NEON     },    .unit = "flags" },
-
+#endif
         { NULL },
     };
     static const AVClass class = {