Re: [gccsdk] Building the libraries

In article <52f191c6f6chrisg@care4free.net>,
Chris Gransden <chrisg@care4free.net> wrote:
> In article <52f18dc357gcc-sub@aconet.nl>,
> Frank de Bruijn <gcc-sub@aconet.nl> wrote:

> > Are you sure about that? From the config.log for the libgtk build
> > attempt which I put on my site two days ago (in log-2.tar.gz):

> I'm wondering if it's got something to do with whether the development
> library packages are installed on the host or not.

I always make sure they are.

> > configure:19655: checking for CAIRO_BACKEND
> > configure:19662: $PKG_CONFIG --exists --print-errors
> > "cairo-$cairo_backend >= 1.6"
> > Package cairo-xlib was not found in the pkg-config search path.

> I take it cairo-gtk2 built ok and it's got '--enable-xlib' in the
> 'setvars' file

Yep.

> or it could be the development libraries need to be installed on the
> host.

They are (libcairo2-dev in this case). I googled this error and found
several exact matches. In at least one of those cases the problem was
solved by installing libcairo2-dev (that does indeed contain
cairo-xlib.pc for pkgconfig). But that's native Linux so once a dev is
installed the .pc files are available.
In this setup, things need to be built before they show up in env, which
creates the circular dependency problem: building libcairo fails because
its dependency librsvg won't build because it needs something from
libgtk which won't build because it needs something from libcairo.

I tried a hack to break out of this circle by temporarily removing
libcairo's dependency on librsvg (edited depends and setvars) and that
seemed to work initially (no 'unrecognized options' - well, at least not
that one...), but the build then failed on something else:

CC cairo-xlib-display.lo
CC cairo-xlib-core-compositor.lo
In file included from cairo-xlib-private.h:41,
from cairo-xlib-display.c:40:
cairo-xlib-xrender-private.h:102: error: redefinition of 'struct _XLinearGradient'
cairo-xlib-xrender-private.h:111: error: redefinition of 'struct _XCircle'
cairo-xlib-xrender-private.h:116: error: redefinition of 'struct _XRadialGradient'
cairo-xlib-xrender-private.h:125: error: redefinition of 'struct _XConicalGradient'
make[3]: *** [cairo-xlib-display.lo] Fout 1
make[3]: *** Wachten op onvoltooide taken...
In file included from cairo-xlib-private.h:41,
from cairo-xlib-core-compositor.c:51:
cairo-xlib-xrender-private.h:102: error: redefinition of 'struct _XLinearGradient'
cairo-xlib-xrender-private.h:111: error: redefinition of 'struct _XCircle'
cairo-xlib-xrender-private.h:116: error: redefinition of 'struct _XRadialGradient'
cairo-xlib-xrender-private.h:125: error: redefinition of 'struct _XConicalGradient'
make[3]: *** [cairo-xlib-core-compositor.lo] Fout 1
make[3]: Map '/opt/riscos/gccsdk/build/libcairo2/cairo-1.12.2/src' wordt verlaten

No idea whether that's caused by my hack or not.

I figured I might as well try another hack and simply copied
cairo-xlib.pc from /usr/lib/i386-linux-gnu/pkgconfig to the pkgconfig
directory in ...gccsdk/env/lib. Building libgtk then seemed to go a
little further before it failed with a completely different error (see
the files in http://aconet.org/tmp/logs-3.tar.gz ).

> I've checked in some more dependency changes. I've got 'build-libs -a'
> to complete all the way through apart from skipping a few that have
> build errors. The dependencies seem to be working now.

Thanks. Checked out.

I've got about half a dozen more failures out of 'build-libs -a' in the
meantime. I'll provide the details later.

Regards,
Frank


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