s/libtool.mk
for an example of how to patch this.
If you fail to patch libtool, the error below is exactly what you will see:
> /tmp/mod_perl-2.0.8/src/modules/perl/mod_perl.so: Undefined symbol
> "modperl_io_perlio_restore_stdout"
I just ran into this myself a few weeks ago
mod_perl.so into server:
/tmp/mod_perl-2.0.8/src/modules/perl/mod_perl.so: Undefined symbol
"modperl_io_perlio_restore_stdout"
2. Used Components and their Configuration:
*** mod_perl version 2.08
*** using /tmp/mod_perl-2.0.8/lib/Apache2/BuildConfig.pm
*** Makefile.PL