Improve -mpreferred-stack-boundary configure message.
Explicitly say we are checking for -mpreferred-stack-boundary=2.
Only 2 is ever used when it is supported. Some gcc versions/arches
(e.g. GCC 4.8 for x86_64) support -mpreferred-stack-boundary, but
only between 4 and 12. The message that -mpreferred-stack-boundary
wasn't supported was a little confusing. So explicitly say we checked
for -mpreferred-stack-boundary=2.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@14324 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.ac b/configure.ac
index a8cba6b..1c56455 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1708,7 +1708,7 @@
# does this compiler support -mpreferred-stack-boundary=2 ?
-AC_MSG_CHECKING([if gcc accepts -mpreferred-stack-boundary])
+AC_MSG_CHECKING([if gcc accepts -mpreferred-stack-boundary=2])
safe_CFLAGS=$CFLAGS
CFLAGS="-mpreferred-stack-boundary=2"
