When attempting to compile both IMAP C-Client support and Sybase-Ct into php3 for an apache module, the compile fails with the following: 

gcc  -DLINUX=2 -DUSE_HSREGEX `./apaci`    \
      -o httpd buildmark.o modules.o modules/standard/libstandard.a modules/php3/libphp3.a main/libmain.a ./os/unix/libos.a ap/libap.a regex/libregex.a  -Wl,-rpath,/usr/lib -Wl,-rpath,/usr/lib/mysql  /root/tmp/imap-4.5/lib/c-client.a -lgd -L/usr/lib -lttf -L/usr/lib/mysql -lmysqlclient -Lmodules/php3 -L../modules/php3
-L../../modules/php3 -lmodphp3          -L/root/tmp/sybase/lib -lcs -lct -lcomn -lintl -lsybtcl -linsck -lgd -lpam -lm -ldl -lcrypt -lnsl  -lresolv
 -lm -lcrypt -lgdbm
collect2: ld terminated with signal 11 [Segmentation fault], core dumped
/root/tmp/sybase/lib/libsybtcl.a(net_clos.o)(.text+0x0): multiple definition of `net_close'
/root/tmp/imap-4.5/lib/c-client.a(mail.o):/root/tmp/imap-4.5/c-client/mail.c:4600: first defined here
modules/php3/libphp3.a(imap.o): In function `php3_imap_headerinfo':
/root/tmp/php-3.0.12/functions/imap.c:1599: undefined reference to `rfc822_parse_msg_full'   
make[2]: *** [target_static] Error 1
make[2]: Leaving directory `/root/tmp/apache_1.3.6/src'
make[1]: *** [build-std] Error 2
make[1]: Leaving directory `/root/tmp/apache_1.3.6'
make: *** [build] Error 2  

Compiling with UW c-client version 4.5 or version 4.6-BETA does not make a difference.