Adding a print statement in eglibc-2.11.2/mach/msgserver.c
          (void) (*demux) (&request->Head, &reply->Head);
          assert (reply->Head.msgh_size <= max_size);
          fprintf(stderr,".");
          switch (reply->RetCode)

ans recompiling libc.so.0.3
makes the long lasting ghc configuration suddenly work:

cd ~/DEBs/ghc/ghc6-6.10.1+dfsg1/libraries/random
LD_LIBRARY_PATH=~/DEBs/eglibc/eglibc-2.11.2/build-tree/hurd-i386-libc/ gdb /home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/libraries/cabal-bin
(gdb) dir ...
(gdb) break msgserver.c:74
(gdb) run /usr/bin/ghc6 /home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/libraries/bootstrapping.conf configure --verbose=3 --with-compiler=/home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/ghc/stage1-inplace/ghc --with-hc-pkg=/home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/utils/ghc-pkg/install-inplace/bin/ghc-pkg
...
(only two threads present)
Program exited normally.

Creates libraries/random/dist/setup-config. Previously it just hang!

When using the installed glibc:
^C when hanging
Adding a print statement in eglibc-2.11.2/mach/msgserver.c
          (void) (*demux) (&request->Head, &reply->Head);
          assert (reply->Head.msgh_size <= max_size);
          fprintf(stderr,".");
          switch (reply->RetCode)

ans recompiling libc.so.0.3
makes the long lasting ghc configuration suddenly work:

cd ~/DEBs/ghc/ghc6-6.10.1+dfsg1/libraries/random
LD_LIBRARY_PATH=~/DEBs/eglibc/eglibc-2.11.2/build-tree/hurd-i386-libc/ gdb /home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/libraries/cabal-bin
(gdb) dir ...
(gdb) break msgserver.c:74
(gdb) run /usr/bin/ghc6 /home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/libraries/bootstrapping.conf configure --verbose=3 --with-compiler=/home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/ghc/stage1-inplace/ghc --with-hc-pkg=/home/srs/DEBs/ghc/ghc6-6.10.1+dfsg1/utils/ghc-pkg/install-inplace/bin/ghc-pkg
...
(only two threads present)
Program exited normally.

Creates libraries/random/dist/setup-config. Previously it just hang!

When using the installed glibc:
^C when hanging
(three threads present)
Program received signal SIGINT, Interrupt.
0x01113970 in trampoline () from /lib/libc.so.0.3
(gdb) info threads
  6 Thread 19821.6  0x010f7f4c in mach_msg_trap ()
    at /home/buildd/build/chroot-sid/home/buildd/byhand/eglibc-2.11.2/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
  5 Thread 19821.5  0x010f7f4c in mach_msg_trap ()
    at /home/buildd/build/chroot-sid/home/buildd/byhand/eglibc-2.11.2/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
* 4 Thread 19821.4  0x01113970 in trampoline () from /lib/libc.so.0.3

(gdb) thread apply all bt

Thread 6 (Thread 19821.6):
#0  0x010f7f4c in mach_msg_trap ()
    at /home/buildd/build/chroot-sid/home/buildd/byhand/eglibc-2.11.2/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
#1  0x010f8749 in __mach_msg (msg=0x29fd4, option=1282, send_size=0,
    rcv_size=0, rcv_name=127, timeout=20, notify=0) at msg.c:110
#2  0x01195608 in timer_thread () at ../sysdeps/mach/hurd/setitimer.c:91
Cannot access memory at address 0x2a000

Thread 5 (Thread 19821.5):
#0  0x010f7f4c in mach_msg_trap ()
    at /home/buildd/build/chroot-sid/home/buildd/byhand/eglibc-2.11.2/build-tree/hurd-i386-libc/mach/mach_msg_trap.S:2
#1  0x010f8749 in __mach_msg (msg=0x17fef30, option=2, send_size=0,
    rcv_size=4096, rcv_name=119, timeout=0, notify=0) at msg.c:110
#2  0x010f8e04 in __mach_msg_server_timeout (demux=0x1109980 <msgport_server>,
    max_size=4096, rcv_name=119, option=0, timeout=0) at msgserver.c:101
#3  0x010f8f4b in __mach_msg_server (demux=0x1109980 <msgport_server>,
    max_size=4096, rcv_name=119) at msgserver.c:196
#4  0x0110994f in _hurd_msgport_receive () at msgportdemux.c:68
#5  0x01274c3c in entry_point (
    start_routine=0x11098e0 <_hurd_msgport_receive>, arg=0x0)
    at /home/buildd/build/chroot-sid/home/buildd/byhand/hurd/./libpthread/pthread/pt-create.c:50
#6  0x00000000 in ?? ()

Thread 4 (Thread 19821.4):
#0  0x01113970 in trampoline () from /lib/libc.so.0.3
#1  0x0000000e in ?? ()
#2  0x00000000 in ?? ()