Makefile.in ($(DESTDIR)${archlibdir}): Convert spaces to TABs.

[bpt/emacs.git] / configure.in

diff --git a/configure.in b/configure.in
index a91d3c7..aee62c0 100644 (file)
--- a/configure.in
+++ b/configure.in
@@ -757,6 +757,21 @@ CFLAGS="$SAVE_CFLAGS"
 unset has_option
 unset SAVE_CFLAGS
 
+### Use -Wold-style-definition if the compiler supports it
+# This can be removed when conversion to standard C is finished.
+AC_MSG_CHECKING([whether gcc understands -Wold-style-definition])
+SAVE_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -Wold-style-definition"
+AC_TRY_COMPILE([], [], has_option=yes, has_option=no,)
+if test $has_option = yes; then
+   C_WARNINGS_SWITCH="-Wold-style-definition $C_WARNINGS_SWITCH"
+fi
+AC_MSG_RESULT($has_option)
+CFLAGS="$SAVE_CFLAGS"
+unset has_option
+unset SAVE_CFLAGS
+
+
 #### Some other nice autoconf tests.
 
 dnl checks for programs