Tarmo Pikaro wrote: > Brian Dessent recommended to me to use pthread instead of win32 > > http://gcc.gnu.org/ml/gcc/2007-03/msg01198.html No, I said Cygwin uses pthreads, not that you should give that as an option. The configure script should know the right value without you specifying anything. The right value is "posix" if you must specify it, and you can get this by looking at the output of gcc -v on the Cygwin provided binaries. Brian