Re: preprocessor/2883: cpp stringizing problem 1

Re: preprocessor/2883: cpp stringizing problem 1

[Carlo Wood]

The following reply was made to PR preprocessor/2883; it has been noted by GNATS.

From: Carlo Wood <carlo@alinoe.com>
To: "Markus F.X.J. Oberhumer" <markus@oberhumer.com>
Cc: gcc-gnats@gcc.gnu.org, debian-gcc@lists.debian.org
Subject: Re: preprocessor/2883: cpp stringizing problem 1
Date: Sun, 20 May 2001 22:51:22 +0200

 On Sun, May 20, 2001 at 08:44:32PM +0200, Markus F.X.J. Oberhumer wrote:
 > $ gcc-3.0 -c -Werror bug02.c
 > bug02.c:13:23: pasting ""_"" and ""foo"" does not give a valid preprocessing
 > token
 ...
 > #define ASM_NAME(x)     __asm__("_" ## #x)
 
 A string literal can't form a new preprocessing token by catenation with another.
 This warning is correct.  Instead you should write:
 
 #define ASM_NAME(x)     __asm__("_" #x)
 
 -- 
 Carlo Wood <carlo@alinoe.com>

Re: preprocessor/2883: cpp stringizing problem 1

[Zack Weinberg]

The following reply was made to PR preprocessor/2883; it has been noted by GNATS.

From: "Zack Weinberg" <zackw@stanford.edu>
To: "Markus F.X.J. Oberhumer" <markus@oberhumer.com>
Cc: gcc-gnats@gcc.gnu.org, debian-gcc@lists.debian.org
Subject: Re: preprocessor/2883: cpp stringizing problem 1
Date: Sun, 20 May 2001 11:55:18 -0700

 On Sun, May 20, 2001 at 08:44:32PM +0200, Markus F.X.J. Oberhumer wrote:
 
 > $ gcc-3.0 -c -Werror bug02.c
 > bug02.c:13:23: pasting ""_"" and ""foo"" does not give a valid preprocessing
 > token
 ...
 
 > #define ASM_NAME(x)     __asm__("_" ## #x)
 
 This is not valid C.  As it says, pasting together the string
 constants "_" and "foo" does not produce a valid single token.
 
 You can just remove the ## from your code.  "_" "foo" is understood as
 meaning the same thing as "_foo" by all versions of GCC.
 
 -- 
 zw     Breeding replacement security officers on farms where giant robot
        combine harvesters operate would tend to increase the evolutionary
        selection pressure, which may be the desired effect.
        	-- David G. Bell

preprocessor/2883: cpp stringizing problem 1

[Markus F.X.J. Oberhumer]

>Number:         2883
>Category:       preprocessor
>Synopsis:       cpp 3.0 200010426 stringizing problem 1
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Sun May 20 11:46:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Markus F.X.J. Oberhumer <markus@oberhumer.com>
>Release:        3.0 20010426 (Debian prerelease) (Debian testing/unstable)
>Organization:
none
>Environment:
System: Linux laetitia 2.4.3 #1 Wed Apr 4 03:58:32 CEST 2001 i586 unknown
Architecture: i586

       =20
host: i386-pc-linux-gnu
build: i386-pc-linux-gnu
target: i386-pc-linux-gnu
configured with: ../src/configure -v
--enable-languages=3Dc,c++,java,f77,proto,objc --prefix=3D/usr
--infodir=3D/share/info --mandir=3D
/share/man --enable-shared --with-gnu-as --with-gnu-ld --with-system-zlib
--enable-long-long --enable-nls --without-x --without
-included-gettext --disable-checking --enable-threads=3Dposix
--enable-java-gc=3Dboehm --with-cpp-install-dir=3Dbin --enable-objc-gc=20
i386-linux
>Description:
        cpp 3.0 200010426 stringizing problem 1
>How-To-Repeat:
$ gcc-3.0 -c -Werror bug02.c
bug02.c:13:23: pasting ""_"" and ""foo"" does not give a valid preprocessin=
g
token

----------------------------------------

$ cat bug02.c
/* Markus F.X.J. Oberhumer <markus@oberhumer.com>
 * gcc 3.0 20010426 (Debian prerelease) bug report:
 *
 *   cpp stringizing problem
 */

#if defined(__GNUC__)
#define ASM_NAME(x)     __asm__("_" ## #x)
#else
#define ASM_NAME(x)
#endif

extern void foo(void) ASM_NAME(foo);

int dummy =3D 0; /* avoid empty source file */
>Fix:
       =20
>Release-Note:
>Audit-Trail:
>Unformatted: