Ah yes i have forgotten to report another problem with rts.{h,c}
in rts.h if HAVE_STRSIGNAL is defined it does declare
the function char *strsignal( int ) witch conflicts with
the strsignal definition in the cygwin include file string.h
const char *_EXFUN(strsignal, (int __signo)); => compiler abort
If we have defined HAVE_STRSIGNAL does it mean we have a
strsignal function defined in string.h or does it only mean
the lib has one ?
In any case you can put a #ifndef __CYGWIN__ around the
strsignal definition in rts.h