Settings specific to maintainer-mode.

+dnl This file is part of GNU mailutils.
+dnl Copyright (C) 2001 Free Software Foundation, Inc.
+dnl
+dnl This file is free software; as a special exception the author gives
+dnl unlimited permission to copy and/or distribute it, with or without
+dnl modifications, as long as this notice is preserved.
+dnl
+dnl This program is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+dnl implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+dnl
+dnl Check for --enable-maintainer-mode and enable maintainer-specific
+dnl settings.
+
+AC_DEFUN(MU_MAINTAINER_MODE,
+  [AM_MAINTAINER_MODE
+   if test x"$USE_MAINTAINER_MODE" = xyes; then
+     if test x"$GCC" = xyes; then
+       AC_MSG_CHECKING(whether gcc accepts -ggdb)
+       CFLAGS="-ggdb"
+       AC_TRY_COMPILE([],void f(){},
+                      AC_MSG_RESULT(yes),
+		      [if test x"$ac_cv_prog_cc_g" = xyes; then
+                         CFLAGS=-g
+                       else
+                         CFLAGS=
+                       fi
+		       AC_MSG_RESULT(no)])
+       CFLAGS="$CFLAGS -DMAINTAINER_MODE"
+     fi
+   fi])