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configure.ac: test for the same atomic function as the one we use 

Unlikely that we'll hit a case where __sync_fetch_and_add is present
while __sync_add_and_fetch isn't. Regardless let's keep things sane and
consistent.

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
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Emil Velikov 2015-11-16 13:51:01 +00:00
parent f4b83bff60
commit 8913cd95b2
1 changed files with 1 additions and 1 deletions
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configure.ac
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@ -210,7 +210,7 @@ AC_CACHE_CHECK([for native atomic primitives], drm_cv_atomic_primitives, [
drm_cv_atomic_primitives="none"
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
int atomic_add(int *i) { return __sync_fetch_and_add (i, 1); }
int atomic_add(int *i) { return __sync_add_and_fetch (i, 1); }
int atomic_cmpxchg(int *i, int j, int k) { return __sync_val_compare_and_swap (i, j, k); }
]],[[]])], [drm_cv_atomic_primitives="Intel"],[])