How to apply patch?

Jason, many thanks to you for patch and comments!

But,I'm  not a cygwin "guru".So, how to apply the tcl.patch?I have placed it to /usr/src/postgresql-7.3.1 and then run:

patch -p1 < tcl.patch. And this gives me:

/*--------------------------------- patch output begin here ------------------------------------------------*/

can't find file to patch at input line 8
Perhaps you used the wrong -p or --strip option?
The text leading up to this was:
--------------------------
|Index: interfaces/libpgtcl/Makefile
|===================================================================
|RCS file: /projects/cvsroot/pgsql-server/src/interfaces/libpgtcl/Makefile,v
|retrieving revision 1.30
|diff -u -p -r1.30 Makefile
|--- interfaces/libpgtcl/Makefile       2002/12/30 17:19:52     1.30
|+++ interfaces/libpgtcl/Makefile       2003/01/14 19:40:46
--------------------------
File to patch:

/*-------------------------------- patch output end here ---------------------------------------------------*/

You wrote:

>Attached is a *work-in-progress* patch that enables PostgreSQL CVS to
>build "cleanly" when configured as follows:

  >  $ configure --with-tcl --with-tclconfig=/usr/lib ...

>Note that I needed to configure --with-tclconfig, but I did *not* have
>to
>do the following:

  >  $ ln -s /bin/tclsh83 /bin/tclsh
  >  $ ln -s /bin/wish83.exe /bin/wish

My Question : should I place tclConfig.sh (and tkConfig.sh) which is originally in /cygwin/lib directory to /cygwin/usr/lib directory?

Next, on my snip->

/* This is my snip -begin */

>> include   -c -o pltcl.o pltcl.c
>>
>> In file included from pltcl.c:40:
>> /usr/include/tcl.h:234: warning: `DLLIMPORT' redefined
>> ../../../src/include/pg_config_os.h:26: warning: this is the location
>>of the
>> previous definition

/* This is my snip -end */

You wrote:

>gcc 3.2 did not produce the above warning!

I've configured this by using CC=gcc-2.So ,gcc-2 produces this output.

But,I'm not so experienced with cygwin and with such a cygwin stuff as "patch" program!

So ,please give me an instruction on how to apply the patch! My environment:WinNT4(SP5) , latest cygwin, and postgresql7.3 source not from CVS , but from postgresql site .

Any help would be very appreciated.

Andrew.