Package: gcc-4.3
Version: 4.3-20071020-1
Severity: normal

Hi,
gcc emits a warning that should not be there probably.

[EMAIL PROTECTED]:~/inline$ cat inline.c 

extern inline char func( int arg )
{
  static const char foomap[4] = {2, 4, 8, 16};
  
  return foomap[arg & 3];
}
[EMAIL PROTECTED]:~/inline$ gcc -c -Wall inline.c 
inline.c: In function 'func':
inline.c:4: warning: 'foomap' is static but declared in inline function 'func' 
which is not static
inline.c:6: warning: 'foomap' is static but used in inline function 'func' 
which is not static
[EMAIL PROTECTED]:~/inline$ 

See fwd message bellow, please.

| To: Vaclav Ovsik <[EMAIL PROTECTED]>
| Cc: Bernd Zeimetz <[EMAIL PROTECTED]>,  [EMAIL PROTECTED]
| Subject: Re: RFS: ustr (updated package)
| From: James Antill <[EMAIL PROTECTED]>
| Date: Mon, 05 Nov 2007 20:18:24 -0500
| 
| Vaclav Ovsik <[EMAIL PROTECTED]> writes:
| 
| > I have setup gcc-4.3 from experimental on a sid xen guest.
| > The warning is emitted for example on following (simplified) code:
| >
| >     extern inline char func( int arg )
| >     {
| >       static const char foomap[4] = {2, 4, 8, 16};
| >
| >       return foomap[arg & 3];
| >     }
| 
|  Yes, from the link Bernd provided the warning is emitted basically
| for anything that uses the static keyword. The above is correct
| though, IMO, as is:
| 
|      extern inline char func( int arg )
|      {
|        static const char foomap[] = "abc";
| 
|        return foomap[arg & 3];
|      }
| 
| > I have red several times the ISO paragraph :). It seems to me, that
| > paragraph applies to this situation.
| > IMHO foomap is `reference to an identifier with internal linkage'.
| > Or no? :)
| 
|  From ISO 9899:1999 6.2.2 Linkages of identifiers:
| 
|  #1
| An identifier declared in different scopes or in the same scope more
| than once can be made to refer to the same object or function by a
| process called linkage. There are three kinds of linkage: external,
| internal, and none.
| 
|  #2
| If the declaration of a file scope identifier for an object or a
| function contains the storage-class specifier static, the identifier
| has internal linkage.
| [...]
|  #6
| The following identifiers have no linkage: an identifier declared to
| be anything other than an object or a function; an identifier declared
| to be a function parameter; a block scope identifier for an object
| declared without the storage-class specifier extern.
| 
| ...from that #2 doesn't apply because the identifier isn't at file
| scope, and so the last part of #6 does apply.
| 
|  Also it's "well known" that in:
| 
| void foobar(void)
| {
|   const char *const foo   = "abcd";
|   static const char bar[] = "abcd";
| }
| 
| ...foo and bar do the same thing, point to some constant data, but bar
| is the better version.
|  As with foo you have a allocated two objects (the pointer being the
| second object), and have to use/manage them both, but with bar you
| have just "named" a single object.
| 
| -- 
| James Antill -- [EMAIL PROTECTED]
| C String APIs use too much memory? ustr: length, ref count, size and
| read-only/fixed. Ave. 44% overhead over strdup(), for 0-20B strings
| http://www.and.org/ustr/

Regards.


-- System Information:
Debian Release: lenny/sid
  APT prefers unstable
  APT policy: (990, 'unstable'), (1, 'experimental')
Architecture: i386 (i686)

Kernel: Linux 2.6.18-5-xen-686 (SMP w/1 CPU core)
Locale: LANG=C, LC_CTYPE=cs_CZ.ISO-8859-2 (charmap=ISO-8859-2)
Shell: /bin/sh linked to /bin/bash

Versions of packages gcc-4.3 depends on:
ii  binutils            2.18.1~cvs20071027-1 The GNU assembler, linker and bina
ii  cpp-4.3             4.3-20071020-1       The GNU C preprocessor
ii  gcc-4.3-base        4.3-20071020-1       The GNU Compiler Collection (base 
ii  libc6               2.6.1-6              GNU C Library: Shared libraries
ii  libgcc1             1:4.3-20071020-1     GCC support library
ii  libgmp3c2           2:4.2.2+dfsg-1       Multiprecision arithmetic library
ii  libgomp1            4.3-20071020-1       GCC OpenMP (GOMP) support library
ii  libmpfr1ldbl        2.3.0.dfsg.1-2       multiple precision floating-point 

Versions of packages gcc-4.3 recommends:
ii  libc6-dev                     2.6.1-6    GNU C Library: Development Librari

-- no debconf information



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