On this page: http://gcc.gnu.org/wiki/SummerOfCode There is a table of accepted projects. This is the last one: Project: GCC support for Windows-compatible Structured Exception Handling (SEH) on the i386 platform Student: Michele Cicciotti Mentor: Ian Lance Taylor Any idea what the status is on this? I also found this page: http://wiki.winehq.org/CompilerExceptionSupport With this information: Windows uses its own exception handling mechanism known as Structured Exception Handling (SEH). A great overview of this mechanism can be found here. Unfortunately, GCC does not support SEH yet. Casper Hornstrup had created an initial implementation, but it was never merged into mainline GCC. Any idea on where Casper's implementation is, or where any information at all can be found on this topic of SEH+GCC?