On 7/31/2019 5:00 PM, Lavrentiev, Anton (NIH/NLM/NCBI) [C] via cygwin wrote: >> Linux and BSD options are not available, whatever the .h #defines. > > Unsupported options should not be shown as features in the headers. Why not just write a patch to fix this and send it to the cygwin-patches mailing list? It would take much less time than continuing this discussion. Ken BKCB؛[H\ܝΈY[K؛[\˚[BTNY[K٘\KB[][ێY[K˚[B[XܚXH[ΈY[K[ [XܚXK\[\CBB