php-install | 2003092

[PHP-INSTALL] zlib.lo is not a valid libtool object! From: Alain Bonnefoy (alain.bonnefoy <email protected>)
Date: 09/29/03

Hi,
When I make php-4.3.3, the link process complains about .lo files (all 1
byte long) which are not valid files.
The command is:

libtool --silent --preserve-dup-deps --mode=link gcc -export-dynamic -g
-o2 -L//opt/lib -R /opt//lib ext/zlib/zlib.lo .......

What are these .lo files?
Why are they 1 byte long only?
how to fix it?

Thanks,
Alain.