Description of problem:
if groff is uninstalled during perl build, file
/usr/lib/perl5/5.8.5/i386-linux-thread-multi/Config.pm	
contains:

installman1dir=''
installman3dir=''
...
installsiteman1dir=''
installsiteman3dir=''
...
installvendorman1dir=''
installvendorman3dir=''
...


instead of:

installman1dir='/usr/share/man/man1'
installman3dir='/usr/share/man/man3'
...
installsiteman1dir='/usr/share/man/man1'
installsiteman3dir='/usr/share/man/man3'
...
installvendorman1dir='/usr/share/man/man1'
installvendorman3dir='/usr/share/man/man3'
...

This perl package can not install man pages.

Version-Release number of selected component (if applicable):
perl-5.8.5-4

How reproducible:
Always

Steps to Reproduce:
1.rpm -e groff
2.rpmbuild --rebuild perl-5.8.5-4.src.rpm
3.rpm -i perl-5.8.5-4.i386.rpm --force
4.rpmbuild --rebuild mod_perl-1.99_12-3.src.rpm
5.Wait for build error 
  
Actual results:


Expected results:


Additional info: