[gentoo-user] Anyone else having trouble with x11-libs/cairo?

[Daniel Quinn <gentoo@danielquinn.org>]

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I just won’t build for me and my research on the forums and BGO keeps 
turning up very old bugs that don’t really feel like they apply to my 
case exactly.

What’s happened so far:

  * I installed a complete GNOME/systemd system with no trouble (~amd64)
  * This installation included a perfect emerge of x11-libs/cairo
  * About a month later, I’ve been doing “emerge -auDN @world” every
    other day or so, and suddenly cairo needs to rebuild, and now it
    fails with a long slew of errors:

|In file included from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-mutex-type-private.h:45:0, 
from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-scaled-font-private.h:45, 
from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairoint.h:422, 
from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-atomic.c:34: 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-mutex-impl-private.h:262:3: 
error: #error "XXX: No mutex implementation found. Cairo will not work 
with multiple threads. Define CAIRO_NO_MUTEX to 1 to acknowledge and 
accept this limitation and compile cairo without thread-safety support." 
# error "XXX: No mutex implementation found. Cairo will not work with 
multiple threads. Define CAIRO_NO_MUTEX to 1 to acknowledge and accept 
this limitation and compile cairo without thread-safety support." ^ In 
file included from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-mutex-type-private.h:45:0, 
from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-scaled-font-private.h:45, 
from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairoint.h:422, 
from 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-atomic.c:34: 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-mutex-impl-private.h:271:11: 
error: unknown type name ‘cairo_mutex_impl_t’ typedef cairo_mutex_impl_t 
cairo_recursive_mutex_impl_t; ^ <lots of similar-looking errors> 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-mutex-type-private.h:161:9: 
error: unknown type name ‘cairo_mutex_impl_t’ typedef cairo_mutex_impl_t 
cairo_mutex_t; ^ 
/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6/src/cairo-botor-scan-converter.c:2076:1: 
warning: ‘botor_add_edge’ defined but not used [-Wunused-function] 
botor_add_edge (cairo_botor_scan_converter_t *self, ^ make[3]: *** 
[Makefile:2352: cairo-botor-scan-converter.lo] Error 1 make[3]: Leaving 
directory 
'/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6-abi_x86_64.amd64/src' 
make[2]: *** [Makefile:1950: all] Error 2 make[2]: Leaving directory 
'/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6-abi_x86_64.amd64/src' 
make[1]: *** [Makefile:906: all-recursive] Error 1 make[1]: Leaving 
directory 
'/var/tmp/portage/x11-libs/cairo-1.14.6/work/cairo-1.14.6-abi_x86_64.amd64' 
make: *** [Makefile:757: all] Error 2 |

The digging I do online mentions something about custom LDFLAGS, but 
since I don’t even know what those are, I’m thinking that’s not it. I’m 
not running any special overlays, but I am running a complete ~amd64 
installation. I’ve try running |revdep-rebuild| (nothing to do) and 
|emerge @preserved-rebuild| just loops in cairo and explodes again.

Anyone have some tips to get me through this?

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