* m4/debug.m4, m4/devel.m4, m4/gccoptim.m4, m4/ndebug.m4: New files.

* Makefile.am (EXTRA_DIST): Add them.
* configure.ac: Call adl_ENABLE_DEVEL, adl_ENABLE_DEBUG, ad_GCC_OPTIM,
and adl_NDEBUG.

m4/devel.m4

@@ -0,0 +1,21 @@
+AC_DEFUN([adl_ENABLE_DEVEL],
+[AC_ARG_ENABLE([devel],
+	       [AC_HELP_STRING([--enable-devel],
+			       [turn on useful developer options])])
+
+ # Turn on devel options for development version, unless
+ # explicitely turned off.
+ if test -z "$enable_devel"; then
+   case $VERSION in
+     *[abcdefghijklmnopqrstuvwxyz])
+       enable_devel=yes ;;
+   esac
+ fi
+
+ if test x"$enable_devel" = xyes; then
+   enable_debug=${enable_debug-yes}
+   enable_warnings=${enable_warnings-yes}
+   enable_assert=${enable_assert-yes}
+   enable_optimizations=${enable_optimizations--O}
+ fi
+])