[Bug c/50647] New: gcc/system.h: wrong prototype for sbrk

[Bug c/50647] New: gcc/system.h: wrong prototype for sbrk

[fzvqedi at v dot mintemail.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

             Bug #: 50647
           Summary: gcc/system.h: wrong prototype for sbrk
    Classification: Unclassified
           Product: gcc
           Version: 4.5.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: fzvqedi@v.mintemail.com


../.././gcc/system.h:394: error: conflicting types for 'sbrk'
it uses (int) as argument, but

according to man sbrk:
void *sbrk(intptr_t increment);

[Bug other/50647] gcc/system.h: wrong prototype for sbrk

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|c                           |other

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-10-07 05:50:15 UTC ---
Can you provide the full command line where this is happening.  This should not
happen if sbrk has declared by the system headers.

[Bug other/50647] gcc/system.h: wrong prototype for sbrk

[fzvqedi at v dot mintemail.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

--- Comment #2 from Roger Meyer <fzvqedi at v dot mintemail.com> 2011-10-07 20:57:27 UTC ---
indeed, this should not happen.

but configure fails to figure that sbrk _is_ provided by the libc.
probably it doesn't use the proper feature test macros.
or it just err'd on compilation due to some wrong typedef's that configure
wrote into auto-host.h, like "#define ssize_t int" and similar nonsense.

however that prototype is just wrong.

once it is fixed i'll try to figure out why configure doesn't/didn't detect
sbrk being there.

[Bug other/50647] gcc/system.h: wrong prototype for sbrk

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

--- Comment #3 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-10-07 21:49:58 UTC ---
In general the declarations in system.h are expected to be used only for 
very archaic hosts that do not have prototypes in their system headers.  
For such hosts, int is probably the right argument type; this prototype 
should never be used for modern hosts.  As such, the prototype should 
probably remain unchanged; no host that actually has intptr_t should ever 
see it.  The problem would be that the declaration was not detected; we 
need more details of the host (including whether you were e.g. building 
natively or building a Canadian cross).

AC_USE_SYSTEM_EXTENSIONS should already ensure all appropriate feature 
test macros are defined for known hosts.

[Bug other/50647] gcc/system.h: wrong prototype for sbrk

[joseph at codesourcery dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

--- Comment #4 from joseph at codesourcery dot com <joseph at codesourcery dot com> 2011-10-07 21:54:27 UTC ---
In general, please see our bug reporting instructions.  Reports of 
problems building GCC are not useful without details of the build, host 
and target systems and the options passed when GCC was configured.

[Bug other/50647] gcc/system.h: wrong prototype for sbrk

[schwab@linux-m68k.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE

--- Comment #5 from Andreas Schwab <schwab@linux-m68k.org> 2011-10-07 22:30:14 UTC ---
Most likely the bootstrap compiler is just broken.

*** This bug has been marked as a duplicate of bug 50646 ***

[Bug other/50647] gcc/system.h: wrong prototype for sbrk

[fzvqedi at v dot mintemail.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50647

Roger Meyer <fzvqedi at v dot mintemail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|DUPLICATE                   |WONTFIX