When I try to compile Qt using ./configure -qt-sql-ibase -qt-sql-sqlite -qt-sql-psql -I /opt/firebird/Headers/ -L /opt/firebird/Libraries/ -v I get the following error.

InterBase auto-detection... ()
g++ -c -pipe -Os -Wall -W -I../../../mkspecs/macx-g++ -I. -I/opt/firebird/Headers -I. -o ibase.o ibase.cpp
g++ -headerpad_max_install_names -o ibase ibase.o -L/opt/firebird/Libraries/ -lgds
/usr/bin/ld: can't locate file for: -lgds
collect2: ld returned 1 exit status
make: *** [ibase] Error 1
InterBase disabled.
InterBase support cannot be enabled due to functionality tests!
Turn on verbose messaging (-v) to ./configure to see the final report.
If you believe this message is in error you may use the continue
switch (-continue) to ./configure to continue.

How do I fix the gds error?

Thanks,
Charles