Steps to reproduce:
1. build gstreamer on a cygwin install

Stack trace:


Other information:
It seems cygwin does not provide madvise(), which gst/elements/gstmultifilesrc.c
uses indiscriminantly. It's also used in gst/elements/gstfilesrc.c and gst/gstinfo.c
The documentation states that gstreamer builds on cygwin, without any other
comment. This seems to be out of date.

Another (corrected) problem was unrecognized struct timeval in
gst/elements/gstfdsrc.c, around line 235:

gstfdsrc.c: In function `gst_fdsrc_get':
gstfdsrc.c:234: error: storage size of `t' isn't known
gstfdsrc.c:253: warning: implicit declaration of function `select'
gstfdsrc.c:234: warning: unused variable `t'

This was corrected by adding
#ifndef HAVE_WIN32
#include <sys/time.h>
#endif
at the beginning of the file.