Hello, When built for mingw target, gdb will misinterpret full path to core file. The fix is very simple (patch attached). --- Aleksandar Ristovski QNX Software Systems ChangeLog: 2008-02-04 Aleksandar Ristovski * corelow.c (core_open): Use IS_ABSOLUTE_PATH. (filenames.h): New include. * Makefile.in (corelow.o): Added dependency.