Several important new features have been added to the Interix
Software Development Kit (SDK) in Microsoft Windows Services for
UNIX 3.0.
New dynamic shared libraries for the standard libraries in
/usr/lib (for example, libc.so, libm.so, and
libcurses.so) and in /usr/X11R5/lib (for example,
libX11.so and libXt.so).
gcc and ld support for creating dynamic shared
libraries.