xen 4.2.0-rc3-pre: building failure on alpine linux / uclibc

[Mark van Dijk <lists+xen@internecto.net>]

After someone suggested alpine linux makes a nice dom0 system I decided
to give it a go. Unfortunately the build process breaks:

---
  AR    i386-dm/libqemu.a
  LINK  i386-dm/qemu-dm
vl.o: In function `dynticks_stop_timer':
/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-traditional-dir/vl.c:1603:
undefined reference to `timer_delete' vl.o: In function
`dynticks_start_timer': /adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-traditional-dir/vl.c:1585:
undefined reference to `timer_create' vl.o: In function
`dynticks_rearm_timer': /adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-traditional-dir/vl.c:1620:
undefined reference to
`timer_gettime' /adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-traditional-dir/vl.c:1633:
undefined reference to `timer_settime' collect2: ld returned 1 exit
status make[4]: *** [qemu-dm] Error 1 make[4]: Leaving directory
`/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-traditional-dir-remote/i386-dm'
make[3]: *** [subdir-i386-dm] Error 2 make[3]: Leaving directory
`/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-traditional-dir-remote'
make[2]: *** [subdir-install-qemu-xen-traditional-dir] Error 2 make[2]:
Leaving directory `/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools'
make[1]: *** [subdirs-install] Error 2 make[1]: Leaving directory
`/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools' make: ***
[install-tools] Error 2 ---

I found this bug occurred to someone back in february '12 when someone
posted the following message and patch to the ML:

http://lists.xen.org/archives/html/xen-devel/2012-02/msg01475.html

But I am either not patching the correct file or this patch is not
working. I was trying a couple of different solutions just to see how I
could get it to work but I'll admit this is like doing rocket science
as a third grader. This is what I tried next to the previously named
patch:

http://pastebin.com/U39H38T7

But the end result:

---
  LINK  qemu-ga
  CC    libdis/i386-dis.o
  LINK  qemu-nbd
cutils.o: In function `strtosz_suffix_unit':
/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-dir/cutils.c:354:
undefined reference to `__isnan'
/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-dir/cutils.c:357:
undefined reference to `modf'
collect2: ld returned 1 exit status
make[3]: *** [qemu-ga] Error 1
make[3]: *** Waiting for unfinished jobs....
make[3]: Leaving directory
`/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools/qemu-xen-dir-remote'
make[2]: *** [subdir-all-qemu-xen-dir] Error 2
make[2]: Leaving directory
`/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools'
make[1]: *** [subdirs-install] Error 2
make[1]: Leaving directory
`/adm/anderson/xen-unstable/src/xen-git-4.2.0/tools'
make: *** [install-tools] Error 2
---

Where do I go from here?

-- 
Stay in touch,
Mark van Dijk.               ,--------------------------------
----------------------------'        Fri Aug 10 09:29 UTC 2012
Today is Boomtime, the 3rd day of Bureaucracy in the YOLD 3178