uname function in MSYS

I am attempting to compile gnu-ghostscript using mingw-msys.  The configure part
was fairly easy but make dies with a error about not finding sys/utsname.h.  I see
that this is needed because one module uses the uname() function.  So far I haven't
found the header file though I have found the function exists within msys-1.0.dll.
 From http://www.mingw.org/wiki/HOWTO_Create_an_MSYS_Build_Environment
I see that this is where I might expect to find uname.

I downloaded some source for msysCORE  and I see the file uname.cc and sys/utsname.h
What I don't see is how I can have a mingw built app use this function.  Am I correct
in thinking that this header and function are not available to use from within a
standard (not built by me) mingw-msys environment?  What do I have to do to be
able to use uname?

Damon Register

------------------------------------------------------------------------------
Live Security Virtual Conference
Exclusive live event will cover all the ways today's security and 
threat landscape has changed and how IT managers can respond. Discussions 
will include endpoint security, mobile security and the latest in malware 
threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/