mesa: Add a MUST_CHECK macro for __attribute__((warn_unused_result)).
In the kernel, this is called __must_check; all our attribute macros in
Mesa appear to be uppercase, so I went with that.
Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matt Turner <mattst88@gmail.com>
diff --git a/configure.ac b/configure.ac
index ea0f069..d240c06 100644
--- a/configure.ac
+++ b/configure.ac
@@ -210,6 +210,7 @@
AX_GCC_FUNC_ATTRIBUTE([malloc])
AX_GCC_FUNC_ATTRIBUTE([packed])
AX_GCC_FUNC_ATTRIBUTE([unused])
+AX_GCC_FUNC_ATTRIBUTE([warn_unused_result])
AM_CONDITIONAL([GEN_ASM_OFFSETS], test "x$GEN_ASM_OFFSETS" = xyes)