[PATCH] tile: avoid compiler warning in feraiseexcept() math_private override

[Chris Metcalf <cmetcalf at tilera dot com>]

---
Is there a more self-descriptive way to achieve this effect?
I'll go ahead and commit this in a day or two if I don't hear any
better suggestions.

Note that the same problem exists for _FPU_GETCW(cw) in
sysdeps/generic/fpu_control.h, so arguably the same solution should be
used there.  I'll propose that as a separate patch if this one
seems acceptable.

 ChangeLog.tile              |    5 +++++
 sysdeps/tile/math_private.h |    5 +++--
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/ChangeLog.tile b/ChangeLog.tile
index 38fec36..3a0a82d 100644
--- a/ChangeLog.tile
+++ b/ChangeLog.tile
@@ -0,0 +1,5 @@
+2012-05-15  Chris Metcalf  <cmetcalf@tilera.com>
+
+	* sysdeps/tile/math_private.h (feraiseexcept): Use statement
+        expression syntax to avoid compiler warning.
+
diff --git a/sysdeps/tile/math_private.h b/sysdeps/tile/math_private.h
index 2dab42b..858db4a 100644
--- a/sysdeps/tile/math_private.h
+++ b/sysdeps/tile/math_private.h
@@ -6,7 +6,8 @@
    And since we don't define FE_INVALID, FE_DIVBYZERO, etc., we
    must ignore the argument of feraiseexcept() as well.  we return
    "1" to indicate we failed to raise an exception, though none of
-   the callers in glibc actually care.  */
-#define feraiseexcept(excepts) 1
+   the callers in glibc actually care.  The extra level of statement
+   expression wrapping avoids "statement with no effect" warnings.  */
+#define feraiseexcept(excepts) ({ 1; })
 
 #endif
-- 
1.6.5.2