Error configuring libltdl on RH 7.1

[Marc Dionne <dionne at cs dot wisc dot edu>]

I'm seeing the following failure while building 3.0.2 on a redhat 7.1
machine (tail end of the build log):

============
configuring in libltdl
running /bin/sh /s/gcc-3.0.2/src/gcc-3.0.2/libjava/../configure 
--host=i686-pc-linux-gnu --build=i686-pc-linux-gnu --enable-multilib
--with-gcc-version-trigger=/s/gcc-3.0.2/src/gcc-3.0.2/gcc/version.c
--prefix=/s/gcc-3.0.2/i386_rh71 --enable-shared
--with-target-subdir=i686-pc-linux-gnu --enable-ltdl-convenience
--with-auxdir=/s/gcc-3.0.2/src/gcc-3.0.2 --cache-file=../../config.cache
--srcdir=/s/gcc-3.0.2/src/gcc-3.0.2/libjava/libltdl
*** /s/gcc-3.0.2/src/gcc-3.0.2/libjava/libltdl/configure.in has no
"per-host:" line.
*** Hmm, looks like this directory has been autoconfiscated.
*** There is no configure script present though.
configure: error: /s/gcc-3.0.2/src/gcc-3.0.2/libjava/../configure failed
for libltdl
make[1]: *** [configure-target-libjava] Error 1
make[1]: Leaving directory `/afs/cs.wisc.edu/s/gcc-3.0.2/src/i386_rh71'
make: *** [bootstrap] Error 2
============

Any ideas?  The fact that I can't find any references to this error
anywhere suggests it might be caused by something specific to our
environment.

Using --disable-libgcj bypasses the issue and everything build cleanly.

Marc