Building with UseCygIPC = YES

[Harold Hunt]

I applied Alan's patches to lib/X11/Font.c and config/cf/cygwin.cf, then set
UseCygIPC to YES.

When building lib X11 I get the following errors:
Font.o(.text+0xc6f):Font.c: undefined reference to `shmat'
Font.o(.text+0xcf2):Font.c: undefined reference to `shmctl'
Font.o(.text+0xd37):Font.c: undefined reference to `shmdt'
Font.o(.text+0xe18):Font.c: undefined reference to `shmdt'
collect2: ld returned 1 exit status
dllwrap: gcc exited with status 1
make: *** [libX11.dll] Error 1

Was there an extra link library added somewhere that was forgotten about?

Harold