autoheader troubles on OS X

[Martin Schaffner]

[ Please CC me in the answer as I'm not in the list ]

Hello,

I'm hunting down a bug where autoheader fails to produce conf.h.in.
I'm on Mac OS X, and I do "autoreconf -i" on d2x 
(http://www.icculus.org/d2x).
When the source tree lives on a HFS+ (OS X native) partition, 
everything works fine.
But on a FAT32 partition, it fails with "configure.ac:19: required file 
`./conf.h.in' not found".

So far, I narrowed the problem down to the following: Running aclocal 
produces the same thing on both partitions.

autoheader fails on FAT32 with "autoheader: error: AC_CONFIG_HEADERS 
not found in configure.ac".

Running "/usr/bin/autom4te --language=autoconf" prints
"m4trace:aclocal.m4:50: -1- m4_pattern_allow([^AM_[A-Z]+FLAGS$])"
on FAT32, doing the same on HFS+ gives no output to the terminal.
Does anybody know what this message means?

Maybe this bug is related to the fact that "stat *foo", "file *foo", 
"ls *foo" all say "File name too long" when run on FAT32, and no file 
matching *foo exists?

Martin