Why is "pangocairo" not built?

[Skip Montanaro <skip pobox com>]

(My apologies if this is a duplicate.  I am not directly subscribed to
this list.  My mail didn't seem to show up, so I figured it just got
discard.)

I'm struggling to get gtk 2.10.6 configured and built.  I've narrowed
the problem down to the pangocairo lib not being built and am focusing
on the pango configure.  Details about my setup:

    OS, compiler: Solaris 10, gcc 3.4
    Pango: 1.14.7
    Cairo: 1.2.4

I set PKG_CONFIG_PATH like so:

    /opt/app/nonc++/glib-2.12/lib/pkgconfig:\
    /opt/app/nonc++/freetype-2.1/lib/pkgconfig:\
    /opt/app/nonc++/xrender-0.8/lib/pkgconfig:\
    /opt/app/nonc++/libpng-1.2/lib/pkgconfig:\
    /opt/app/nonc++/fontconfig-2.2/lib/pkgconfig:\
    /opt/app/nonc++/cairo-1.2/lib/pkgconfig

and configure like so:

    ./configure CC=/opt/app/g++lib6/gcc-3.4/bin/gcc \
    --prefix=/opt/app/nonc++/pango-1.14 --with-dynamic-modules=no

I use --with-dynamic-modules=no because I'm trying to avoid compiling
the arabic module, which currently fails for me.

When configuring Pango, I get this output related to Cairo:

    checking for CAIRO... yes
    checking for cairo_surface_write_to_png in -lcairo... yes
    checking for cairo_ps_surface_create in -lcairo... yes
    checking for cairo_pdf_surface_create in -lcairo... yes
    checking for cairo_xlib_surface_create in -lcairo... yes
    checking for cairo_win32_scaled_font_select_font in -lcairo... no
    checking for cairo_ft_scaled_font_lock_face in -lcairo... yes
    checking for cairo_atsui_font_face_create_for_atsu_font_id in -lcairo... no
    ...
    config.status: creating pangocairo.pc
    ...
    config.status: creating pangocairo-uninstalled.pc
    ...
    configuration:
            backends: X

I don't understand why the cairo backend isn't configured and can't
follow the somewhat arcane logic in the configure script.  In
configure.in I see

    PKG_CHECK_MODULES(CAIRO, cairo >= 1.2.2, have_cairo=true, :)

which looks straightforward enough.  I do have Cairo 1.2.4 installed,
it's mentioned in PKG_CONFIG_PATH and the configure script agrees that
Cairo is available.

So why isn't the pangocairo lib built?

--
Skip Montanaro - skip pobox com - http://www.mojam.com/
"The hippies and the hipsters did some great stuff in the sixties,
but the geeks pulled their weight too." -- Billy Bragg