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Use a configure check for bswap16 instead of gcc version #ifdefs.

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Fixes a build problem on apple clang.

Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com>
This commit is contained in:
Ralph Giles
2014-11-04 11:58:45 -08:00
committed by Erik de Castro Lopo
parent 1f30b3e711
commit 7a671e7c41
2 changed files with 2 additions and 1 deletions
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1
configure.ac
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@@ -67,6 +67,7 @@ AC_CHECK_HEADERS([stdint.h inttypes.h byteswap.h sys/param.h termios.h x86intrin
AC_HEADER_TIOCGWINSZ AC_HEADER_TIOCGWINSZ
XIPH_C_BSWAP32 XIPH_C_BSWAP32
XIPH_C_BSWAP16
ac_cv_c_big_endian=0 ac_cv_c_big_endian=0
ac_cv_c_little_endian=0 ac_cv_c_little_endian=0

2
include/share/endswap.h
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@@ -34,7 +34,7 @@
#if HAVE_BSWAP32 /* GCC and Clang */ #if HAVE_BSWAP32 /* GCC and Clang */
/* GCC prior to 4.8 didn't provide bswap16 on x86_64 */ /* GCC prior to 4.8 didn't provide bswap16 on x86_64 */
#if __GNUC__ <= 4 && __GNUC_MINOR__ < 8 #ifndef HAVE_BSWAP16
static inline unsigned short __builtin_bswap16(unsigned short a) static inline unsigned short __builtin_bswap16(unsigned short a)
{ {
return (a<<8)|(a>>8); return (a<<8)|(a>>8);