diff options
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index d7070529..2852962e 100644 --- a/configure.ac +++ b/configure.ac @@ -146,6 +146,23 @@ if test "x$HAVE_LIBUDEV" = xyes; then fi AM_CONDITIONAL(HAVE_LIBUDEV, [test "x$HAVE_LIBUDEV" = xyes]) +# Check for atomic intrinsics +AC_CACHE_CHECK([for native atomic primitives], drm_cv_atomic_primitives, +[ + drm_cv_atomic_primitives="none" + + AC_TRY_LINK([ +int atomic_add(int i) { return __sync_fetch_and_add (&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" + ) +]) +if test "x$drm_cv_atomic_primitives" = xIntel; then + AC_DEFINE(HAVE_INTEL_ATOMIC_PRIMITIVES, 1, + [Enable if your compiler supports the Intel __sync_* atomic primitives]) +fi + AC_SUBST(WARN_CFLAGS) AC_OUTPUT([ Makefile |