| Add new method to judge whether <altivec.h> is needed |
| |
| The original logic will use "typedef vector int t;" to judge |
| whether <altivec.h> is needed. altivec.h contains the following |
| statement: |
| |
| #if !defined(__APPLE_ALTIVEC__) |
| #define vector __vector |
| #define pixel __pixel |
| #define bool |
| #endif |
| |
| In gcc-4.3.3, __APPLE_ALTIVEC__ is not defined by compiler, neither |
| as vector, pixel, and bool. In order to make "typedef vector int t;" |
| pass the compilation, we need to include altivec.h. |
| |
| However in gcc-4.5.0, __APPLE_ALTIVEC__ is defined by compiler, |
| so as vector, pixel, and bool. We could not judge whether |
| altivec.h is needed by "typedef vector int t;". |
| Here we include another statement "int tmp = __CR6_EQ;", in |
| which __CR6_EQ is defined in altivec.h. |
| |
| Upstream-Status: Pending |
| |
| Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com> |
| |
| diff -ruN a/configure.in b/configure.in |
| --- a/configure.ac 2010-09-14 20:55:42.399687663 +0800 |
| +++ b/configure.ac 2010-09-14 20:56:43.403204648 +0800 |
| @@ -79,11 +79,11 @@ |
| CFLAGS="$OPT_CFLAGS $TRY_CFLAGS $CFLAGS" |
| AC_MSG_CHECKING([if <altivec.h> is needed]) |
| AC_TRY_COMPILE([], |
| - [typedef vector int t; |
| + [typedef vector int t; int tmp = __CR6_EQ; |
| vec_ld(0, (unsigned char *)0);], |
| [have_altivec=yes; AC_MSG_RESULT(no)], |
| [AC_TRY_COMPILE([#include <altivec.h>], |
| - [typedef vector int t; vec_ld(0, (unsigned char *)0);], |
| + [typedef vector int t; int tmp = __CR6_EQ; vec_ld(0, (unsigned char *)0);], |
| [AC_DEFINE([HAVE_ALTIVEC_H],, |
| [Define to 1 if you have the <altivec.h> header.]) |
| have_altivec=yes; AC_MSG_RESULT(yes)], |