I've finally succeeded compiling GTK+-2.10 for HP-UX 11.00,
using the current source for cairo.
Though it does not run.

I suspected that a broken Xlib von HP-UX 11.00 might be the reason.
That's why:


When I start gtk-demo with DISPLAY on Linux X.org 6.8.2, I get

SEGV_UNKNOWN - Unknown Error
#0  0xc10ebf00 in XRenderQueryFormats (dpy=0x400146a8) at Xrender.c:335
335     in Xrender.c

When I start gtk-demo with display on a HP-UX 11.11, I get
Error: Cairo 1.2.5 does not yet support the requested image format:
        Depth: 8
        Alpha mask: 0x00000000
        Red   mask: 0x00000000
        Green mask: 0x00000000
        Blue  mask: 0x00000000
Please file an enhacement request (quoting the above) at:
http://bugs.freedesktop.org/enter_bug.cgi?product=cairo
Assertion failed: NOT_REACHED, file
/soft/gtk/gtk2/gtk+-2.10/cairo-LATEST/cairo-1.2.4/src/cairo-
image-surface.c, line 155


The same problem occurs with DISPLAY on an SGI, although
both the HP-UX 11.11 and the SGI have not only an 8bit visual, 
but plenty of 24bit TrueColor and DirectColor visuals, too.

Then I installed GTK+2.10 and all its libraries that I had compiled
for HP-UX 11.00 on the HP-UX 11.11... and it worked!
On all my Linux, HP-UX 11.11 and SGI displays!
(Though the fonts do not have any anti-aliasing, even on the
Linux display with XRender extension.)

Unfortunately, I could not test with DISPLAY on an HP-UX 11.00


Any advice? (except the obvious: avoiding HP-UX)