I've been trying to make a php/httpd binary that can connect
to either MySQL or Sybase or both at the same time.  I can
compile the php3 module with no problems but when I try to
link that object into Apache 1.3.0, it fails.  The errors follow:

/usr/local/sybase/lib/libsybtcl.a(net_inet.o)(.text+0x70): multiple definition of 'net_init'
/usr/local/mysql/lib/libmysqlclient(net.o)(.text+0x70): first defined here
/usr/local/sybase/lib/libsybtcl.a(net_read.o)(.text+0x0): multiple definition of 'net_read'
/usr/local/mysql/lib/libmysqlclient(net.o)(.text+0x390): first defined here
/usr/local/sybase/lib/libsybtcl.a(net_writ.o)(.text+0x0): multiple definition of 'net_write'
/usr/local/mysql/lib/libmysqlclient(net.o)(.text+0x16c): first defined here
make: *** [target_static] Error 1

I guess it's not really a bug in php since the php module compiles
ok.  But if you can only select one at a time, then the setup options for php databases should be mutually exclusive.