Problems compiling latest CVS version of gtk+

[Skip Montanaro <skip pobox com>]

In order to begin playing with James Henstridge's latest pygtk bindings, I
needed to check out and compile recent CVS snapshots of glib, pango and
gtk+.  Accordingly, I issued the necessary CVS incantations and started
building.  Took me awhile to get things going, but I finally got all three
packages configured and managed to build and install glib and pango.

Alas, gtk+ is stumping me.  When built out-of-the-box it fails at one point
trying to execute gdk-pixbuf/make-inline-pixbuf because that program hasn't
been built to include support for PNG files.  I found a bunch of #ifdef
INCLUDE_xxx blocks in gdk-pixbuf/gdk-pixbuf-io.c but no place anywhere else
that these macros were defined or referenced.  Stumbling along, I simply
added

    #define INCLUDE_png

to the top of gdk-pixbuf-io.c.  Then I got complaints at link time about
gdk_pixbuf__png_fill_vtable not being defined.  I found that in io-png.c,
then modified the link commands in Makefile for make-inline-pixbuf and
test-gdk-pixbuf.  That got me further along, but now I'm finding this:

    make[3]: Entering directory `/home/skip/src/gtk/gtk+/gtk'
    /bin/sh ../libtool --mode=link gcc  -g -O2 -g -Wall    -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include   -version-info 2:0:0 -export-dynamic -rpath /usr/local/lib -export-symbols-regex "^[^_].*" -L/usr/local/lib -L/usr/X11R6/lib -lpangox -lX11 -lpango -lgobject-1.3 -lgmodule-1.3 -ldl -lglib-1.3 -rdynamic -L/usr/local/lib -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -L/usr/X11R6/lib -lXext -lX11 -lm -o gtk-query-immodules-2.0  queryimmodules.o libgtk-x11-1.3.la ../gdk-pixbuf/libgdk_pixbuf-1.3.la ../gdk/libgdk-x11-1.3.la -L/usr/X11R6/lib -lXext -lX11 -L/usr/local/lib -L/usr/X11R6/lib -lpangox -lX11 -lpango -lgobject-1.3 -lgmodule-1.3 -ldl -lglib-1.3 -rdynamic -L/usr/local/lib -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -lm 
    libtool: link: warning: `-version-info' is ignored for programs
    gcc -g -O2 -g -Wall -I/usr/local/include/glib-2.0 -I/usr/local/lib/glib-2.0/include -L/usr/local/lib -L/usr/X11R6/lib -lpangox -lX11 -lpango -lgobject-1.3 -lgmodule-1.3 -ldl -lglib-1.3 -rdynamic -L/usr/local/lib -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -L/usr/X11R6/lib -lXext -lX11 -lm -o .libs/gtk-query-immodules-2.0 queryimmodules.o .libs/libgtk-x11-1.3.so -lpangox -lX11 -lpango -lgobject-1.3 -lgmodule-1.3 -ldl -lglib-1.3 -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -lXext -lX11 -lm ../gdk-pixbuf/.libs/libgdk_pixbuf-1.3.so -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -ltiff -ljpeg -lpng -lz ../gdk/.libs/libgdk-x11-1.3.so -lpangox -lX11 -lpango -lgobject-1.3 -lgmodule-1.3 -ldl -lglib-1.3 -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -lXext -lX11 -lm -L/usr/X11R6/lib -lXext -lX11 -L/usr/local/lib -L/usr/X11R6/lib -lpangox -lX11 -lpango -lgobject-1.3 -lgmodule-1.3 -ldl -lglib-1.3 -rdynamic -L/usr/local/lib -lgobject-1.3 -lgmodule-1.3 -ldl -lgthread-1.3 -lpthread -lglib-1.3 -lm -Wl,--export-dynamic -Wl,--rpath -Wl,/usr/local/lib
    /usr/bin/ld: warning: libjpeg.so.62, needed by ../gdk-pixbuf/.libs/libgdk_pixbuf-1.3.so, may conflict with libjpeg.so.6
    /usr/bin/ld: warning: libpng.so.2, needed by ../gdk-pixbuf/.libs/libgdk_pixbuf-1.3.so, may conflict with libpng.so.1.0
    ../gdk-pixbuf/.libs/libgdk_pixbuf-1.3.so: undefined reference to `gdk_pixbuf__png_fill_vtable'
    .libs/libgtk-x11-1.3.so: undefined reference to `g_param_spec_unichar'

Since that seems to also involve the gdk-pixbuf stuff I thought I'd stop and
ask for some help before running off like a bull in a china shop once again.
Am I missing something essential in the configure step (I just executed
autogen.sh to configure all three packages) that is keeping compilation from
completing?  The fact that I couldn't find the INCLUDE_png macro mentioned
anywhere suggests to me that I'm missing something important.

Thanks,

-- 
Skip Montanaro (skip pobox com)
(847)971-7098