Enable a few more compiler warnings.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15243 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.ac b/configure.ac
index d03aa5c..7faeac2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1760,7 +1760,9 @@
 AC_GCC_WARNING_SUBST([format], [FLAG_W_FORMAT])
 AC_GCC_WARNING_SUBST([format-security], [FLAG_W_FORMAT_SECURITY])
 AC_GCC_WARNING_SUBST([cast-qual], [FLAG_W_CAST_QUAL])
-
+AC_GCC_WARNING_SUBST([old-style-declaration], [FLAG_W_OLD_STYLE_DECLARATION])
+AC_GCC_WARNING_SUBST([ignored-qualifiers], [FLAG_W_IGNORED_QUALIFIERS])
+AC_GCC_WARNING_SUBST([missing-parameter-type], [FLAG_W_MISSING_PARAMETER_TYPE])
 
 # does this compiler support -Wextra or the older -W ?