Test pthreads4.cc takes forever on cygwin. The other tests run in a reasonable time. On 900 MHz PIII 10^4 iterations: 47 s 10^5 iterations: 433 s (> 300s dejagnu timeout) Would you accept a patch something like #if defined(__CYGWIN__) static int iters = 10000; #else static int iters = 1000000; #endif