Paul Smedley has added GCC 4.3.4 on www.smedley.info/os2ports/ This the OS/2 port of the GNU C Compiler.
Web page: os2ports.smedley.info/index.php
Download download.smedley.info/gcc-4.3.4-os2-20090807.zip
Please let Paul know if you find this software useful. He needs user feedback to continue work on these projects. He maintains a bug tracker
for many projects at mantis.smedley.info It just requires a simple registration.
If you'd like to help support continued development of this project (and many others) for OS/2 & eComStation, please consider making a donation either via Paypal using the link on Paul's website, or using the Mensys Online Store www.mensys.net/os2ports/