Re: preprocessor/7947: cpp0 -std=gnu99 rejects # comments

[Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>]

The following reply was made to PR preprocessor/7947; it has been noted by GNATS.

From: Marcus Brinkmann <Marcus.Brinkmann@ruhr-uni-bochum.de>
To: Neil Booth <neil@daikokuya.co.uk>
Cc: neil@gcc.gnu.org, bug-hurd@gnu.org, gcc-bugs@gcc.gnu.org,
	gcc-gnats@gcc.gnu.org
Subject: Re: preprocessor/7947: cpp0 -std=gnu99 rejects # comments
Date: Tue, 17 Sep 2002 21:45:09 +0200

 On Tue, Sep 17, 2002 at 08:22:38PM +0100, Neil Booth wrote:
 > Marcus Brinkmann wrote:-
 > 
 > > That is my fault for not being precise enough in my bug report, sorry.
 > > 
 > > The problem is that gcc calls the preprocessor with this ordering when
 > > compiling an assembler file (foo.S) with the -std=gnu99 option.
 > > 
 > > Try "echo \# foo > foo.S" and "gcc -std=gnu99 -o foo foo.S", this triggers
 > > the bug.  -v shows that gcc passes -std=gnu99 to cpp when preprocessing the
 > > file.
 > 
 > Right, but everything you state is intentional.  -lang-asm deliberately
 > comes first, otherwise it would clobber various other flags the user
 > may have passed, such as -fdollars-in-identifiers, -trigraphs etc.
 > 
 > The problem you have is that -std=gnu99 applies to the C language, and
 > not to assembler.
 > 
 > What is the reason you need to pass the switch?  If it's to avoid a
 > spurious warning, we may be able to disable the warning if -lang-asm.
 > If it's to achieve some additional functionality, we may be able to
 > retain that functionality if -lang-asm.
 
 Ayup, I just see my mistake.  We are setting -std=gnu99 in CPPFLAGS, not CFLAGS. 
 D'oh!  I will put the blame elsewhere then :)
 
 Thanks a lot for your patience,
 Marcus
 
 -- 
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 Marcus Brinkmann              The Hurd http://www.gnu.org/software/hurd/
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