All, I compiled GDB 4.17.87 with the April 8th cygwin-src snapshot. Compiled fine. However, whenever i try to run a program, it gets a SIGSEGV in _size_of_stack_reserve(). When I used a cygwin1.dll from march 30 and earlier ( from the snapshot site ) it works fine. The latest 2 snapshot dlls will not even run bash.exe. Thanks, John Fortin