I have the very same problem on my automatic build host:
make all TARGET=mess mkdir.exe -p obj/windows ... mkdir.exe -p obj/windows/tools Compiling src/osd/windows/vconv.c... cc1.exe: internal compiler error: Illegal instruction Please submit a full bug report, with preprocessed source if appropriate. See <http://gcc.gnu.org/bugs.html> for instructions. make: *** [obj/windows/osd/windows/vconv.o] Error 1
It's an old AMD Athlon XP based machine with WinXP SP3