[PATCH v2] sbc_primitives: Fix build on non-x86.

[marius@gnu.org]

From: Marius Bakke <marius@devup.no>

Don't call __builtin_cpu_init unless targeting i386 or x86_64.
Otherwise we get an error at link time:

  CC       sbc/sbc_primitives.lo
sbc/sbc_primitives.c: In function ‘sbc_init_primitives_x86’:
sbc/sbc_primitives.c:596:2: warning: implicit declaration of function ‘__builtin_cpu_init’; did you mean ‘__builtin_irint’? [-Wimplicit-function-declaration]
[...]
  CCLD     src/sbcdec
ld: sbc/.libs/libsbc-private.a(sbc_primitives.o): in function `sbc_init_primitives':
sbc_primitives.c:(.text+0x3a30): undefined reference to `__builtin_cpu_init'
---
 sbc/sbc_primitives.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sbc/sbc_primitives.c b/sbc/sbc_primitives.c
index 97a75be..d8e166a 100644
--- a/sbc/sbc_primitives.c
+++ b/sbc/sbc_primitives.c
@@ -593,7 +593,9 @@ static int sbc_calc_scalefactors_j(
 
 static void sbc_init_primitives_x86(struct sbc_encoder_state *state)
 {
+#if defined(__x86_64__) || defined(__i386__)
 	__builtin_cpu_init();
+#endif
 
 #ifdef SBC_BUILD_WITH_MMX_SUPPORT
 	if (__builtin_cpu_supports("mmx"))
-- 
2.29.2