Build Help!

[Ravindra Viswanath]

Hi

I currently have 21.4.15, but for what ever reason my installation does not
have a subr.el file, which has the add-to-invisibility-spec function that I
need to use.

To overcome this deficiency, I downloaded Xemacs 21.5, and was attempting to
build it from source through this package:

http://ftp.xemacs.org/xemacs-21.5/xemacs-21.5.0.tar.gz

Two problems here:

1. Although this file has a subr.el, it does not have the
add-to-invisibility-spec that I desperately need.
2. When I try to build, I bomb out on the ./configure step with :

configure:3220: gcc -o conftest -g -O3 -Wall -Wno-switch -Winline
-Wmissing-prototypes -Wshadow -Wsign-compare        -L/usr/lib64
-Xlinker -rpath -Xlinker /usr/lib64 conftest.c          -lgcc -lc -lgcc
/usr/lib/crtn.o 1>&5

 and

configure:3450:28: error: cygwin/version.h: No such file or directory
configure:3450:23: error: mach/mach.h: No such file or directory

This is on a X86-64 RedHat system

I tried specifying /usr/lib64 as the --site-libraries and
--site-runtime-libraries, but with no noticeable effect based on
config.log.

My needs are fairly straight-forward. I need to get add-to-invisibility-spec
working so that I might get the hide-lines.el (another script) working. Can
I get that going on my existing 21.4.15? If not how can I overcome the above
and get 21.5 working with add-to-invisibility-spec (given that this function
is not defined in subr.el, although it is defined in a file of the same name
in my emacs installation)?

Thanks
RAvindra