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

diff --git a/configure.ac b/configure.ac
index a8cba6b2a475f43541519783a0f4c50586ed8826..1c56455a8fd4417b50fb2082298390ba54918462 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -1708,7 +1708,7 @@ AC_SUBST(FLAG_MSSE)
 
 
 # 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"