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Message-ID:	<C9150052B112D3119E9E0004ACA6E437025AFCB9@tepg1.tepg.co.uk>
From:	"Bruce Adams" <bruadams AT tycoint DOT com>
To:	<cygwin AT cygwin DOT com>, <crossgcc AT sources DOT redhat DOT com>
Subject:	RE: Preprocessing Assembly
Date:	Thu, 12 Sep 2002 16:39:10 +0100
MIME-Version:	1.0
X-OriginalArrivalTime:	12 Sep 2002 15:46:26.0953 (UTC) FILETIME=[8DFA5F90:01C25A73]

> -----Original Message-----
> From: Dhananjay R. Deshpande [mailto:dhananjayd AT kpit DOT com]
> Sent: Thursday, September 12, 2002 3:03 PM
> To: Dhananjay R. Deshpande; Bruce Adams; cygwin AT cygwin DOT com; 
> crossgcc AT sources DOT redhat DOT com
> Subject: RE: Preprocessing Assembly
> 
> > > Is there a way to force gcc to preprocess assembly using a switch.
> > 
> > Yes. Use "-x assembler-with-cop" switch.
> 
> Typo.. Use "-x assembler-with-cpp" switch.

Ah ok.  Missed that one when I RTFM.  You don't need the space though. One
teensy flaw.  
The prebuilt rtems compiler I'm using (being stuck unable to build my own
for now) can't find cpp0.  I copied that into C:\cygwin\opt\rtems\bin from
C:\cygwin\opt\rtems\lib\gcc-lib\m68k-rtems\2.95.3 and it works. However, I
now have syntax errors in my assembly but the line numbers refer to the
preprocessed output rather than the original file.
Closer inspection of my workaround to use gcc -E reveals something more
insidious and slightly 
surprising.  Gcc -E produces no output at all.  This seems to go for both
the cygwin native gcc and
the rtems one.  If I run cpp0.exe directly I get output.  Neither cpp or gcc
put anything on stdout.
I know the preprocessor works (people would have noticed if it didn't!) so
what am I Missing?  	
						Regards,
							  Bruce A.



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