I configured PHP with-pfpro=(correct signio lib directory). Make and Make Install worked fine.

I switched over to apache, and remade it. When it got to pfpro, I got this:

modules/php4/libphp4.a(pfpro.o): In function `php_rshutdown_pfpro':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x58): undefined reference to `
PNCleanup'
modules/php4/libphp4.a(pfpro.o): In function `php_info_pfpro':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x87): undefined reference to `
PNVersion'
modules/php4/libphp4.a(pfpro.o): In function `php_if_pfpro_version':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0xc9): undefined reference to `
PNVersion'
modules/php4/libphp4.a(pfpro.o): In function `php_if_pfpro_init':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x115): undefined reference to
`PNInit'
modules/php4/libphp4.a(pfpro.o): In function `php_if_pfpro_cleanup':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x149): undefined reference to
`PNCleanup'
modules/php4/libphp4.a(pfpro.o): In function `php_if_pfpro_process_raw':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x80b): undefined reference to
`PNInit'
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x862): undefined reference to
`ProcessPNTransaction'
modules/php4/libphp4.a(pfpro.o): In function `php_if_pfpro_process':
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x127c): undefined reference to
 `PNInit'
/usr/local/etc/php-4.0.4/ext/pfpro/pfpro.c(.text+0x12ce): undefined reference to
 `ProcessPNTransaction'
*** Error code 1

Stop in /usr/local/etc/apache_1.3.14/src.
*** Error code 1

Stop in /usr/local/etc/apache_1.3.14.
*** Error code 1

Stop in /usr/local/etc/apache_1.3.14.