[Bug: 21.5-b29] configure doesn't know its own options

[Karl Kleinpaste]

For your entertainment value...  Last evening, this Fedora11 box
informed me of new packages, which I installed, and now .29's configure
no longer complains about any options I use.  I don't know which package
induced the change in behavior; no auto-anything package was included,
though gnome-common.sh was, which includes gnome-autogen.sh.

But even so, a couple glitches.

--with-database=gdbm fails because it can't find /usr/include/ndbm.h,
due to being buried an extra level deep in /usr/include/gdbm.
Symlinking /usr/include/ndbm.h -> gdbm/ndbm.h makes it work.

--with-union-type induces this compilation failure:
glyphs-gtk.c: In function 'gtk_xpm_instantiate':
glyphs-gtk.c:1334: error: incompatible types when assigning to type 'Lisp_Object' from type 'int'
glyphs-gtk.c:1335: error: incompatible types when assigning to type 'Lisp_Object' from type 'int'
make[1]: *** [glyphs-gtk.o] Error 1
Removing the option makes compilation succeed.