I suspect not.
Somewhere from a dark recess of my memory, I can hear a voice telling me that they've different calling conventions.
If you've the lib or dll files of both modules, you'd ideally decompile, modify and then recompile using the same (gcc?) compiler.
For curiosity's sake, may I ask what the intention/limitations are?
IDAPro, OllyDbg and td.exe (Turbo Debugger) all come to mind. Don't suppose the gcc portion was compiled with djgpp, was it? That brings back memories from 15 years ago. :)
[EDIT:] A little more poking about has led me to the homepage for
Boomerang[
^], which touts itself as being "A general, open source, retargetable decompiler of machine code programs" perhaps this will help you in your quest.
I also came across a paper that goes into techniques for decompilation, you may find the paper
here[
^] (It's where I found out about Boomerang) I haven't checked to see if the program described in the paper is available for download or not, but hopefully Boomerang will be able to do this for you anyway. If I were you, I'd look at the
Help! I've lost my source code[
^] section.
Cheers!
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