[Qemu-devel] [PATCH] configure: Add signed*signed check to [u]int128_t test

[Peter Maydell]

clang 3.8 with -fsanitize=undefined will fail to link code containing an
int128_t * int128_t multiply (http://llvm.org/bugs/show_bug.cgi?id=16404)
so add this to our configure test for whether [u]int128_t are usable.

Signed-off-by: Peter Maydell <address@hidden>
---
 configure |    1 +
 1 file changed, 1 insertion(+)

diff --git a/configure b/configure
index ad32f87..6465e05 100755
--- a/configure
+++ b/configure
@@ -3329,6 +3329,7 @@ __uint128_t b;
 int main (void) {
   a = a + b;
   b = a * b;
+  a = a * a;
   return 0;
 }
 EOF
-- 
1.7.9.5