This is the mail archive of the
mailing list for the Cygwin project.
RE: Preprocessing Assembly
- From: "Bruce Adams" <bruadams at tycoint dot com>
- To: <cygwin at cygwin dot com>,<crossgcc at sources dot redhat dot com>
- Date: Fri, 13 Sep 2002 14:51:01 +0100
- Subject: RE: Preprocessing Assembly
> -----Original Message-----
> From: Bruce Adams [mailto:firstname.lastname@example.org]
> Sent: Thursday, September 12, 2002 4:39 PM
> To: email@example.com; firstname.lastname@example.org
> Subject: RE: Preprocessing Assembly
> > -----Original Message-----
> > From: Dhananjay R. Deshpande [mailto:email@example.com]
> > Sent: Thursday, September 12, 2002 3:03 PM
> > To: Dhananjay R. Deshpande; Bruce Adams; firstname.lastname@example.org;
> > email@example.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?
> Bruce A.
Okay. I have obtained part of the answer through RTFMing and
Apparently gcc -E doesn't work unless I also use -x assembly-with-cpp
or equally -x c++.
My initial syntax errors were caused by the line directives output by
the preprocessor. Gcc chokes itself. If I disable those using -Wp,-P
then I at least get syntax errors relating to our assembly code, though
the line numbers only make sense if use a two stage process and investigate
the intermediate file.
Another thing it seems to dislike is the use of 0x to signify hexadecimal in
constants. I was all set to change to the alternate notation of an H at the
end when the manual (www.delorie.com/gnu/docs/binutils/as_36.html)
told me this was legal. What else am I missing? :-)
Any opinions expressed in this e-mail are those of the individual and not
necessarily those of Tyco Electronic Product Group.
Any prices for the supply of goods or services are only valid if supported
by a formal written quotation.
This e-mail and any files transmitted with it, including replies and
forwarded copies (which may contain alterations) subsequently transmitted
from Tyco Electronic Product Group are confidential and solely for the use
of the intended recipient.
If you are not the intended recipient or the person responsible for
delivery to the intended recipient, be advised that you have received this
e-mail in error and that any use is strictly prohibited. In this event,
please notify us via e-mail at 'firstname.lastname@example.org' or telephone on
0121 255 6499 and then delete the e-mail and any copies of it.
Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
Bug reporting: http://cygwin.com/bugs.html