[Bug c++/14509] New: Problem compiling ACE (sigaction)

["schmid at snake dot iap dot physik dot tu-darmstadt dot de" <gcc-bugzilla at gcc dot gnu dot org>]

The following example reduced from the current ACE distribution does not 
compile. Gcc 3.3 accepts it without a warning. When I change the #if 1 to #if 0 
the code is accepted. Maybe I am mistaken but this result is surprising to me 
and it might be a regression. Please explain that ACE can be fixed 
appropriately. 
 
g++ -v -c t.C 
Reading specs from /usr/local/lib/gcc/i686-pc-linux-gnu/3.4.0/specs 
Configured with: ../gcc/configure --enable-threads=posix --enable-languages=c,c
++,f77,objc --enable-__cxa_atexit --enable-libstdcxx-debug 
Thread model: posix 
gcc version 3.4.0 20040309 (prerelease) 
 /usr/local/libexec/gcc/i686-pc-linux-gnu/3.4.0/cc1plus -quiet -v -D_GNU_SOURCE 
t.C -quiet -dumpbase t.C -mtune=pentiumpro -auxbase t -version -o /tmp/
ccsHlEoU.s 
ignoring nonexistent directory "NONE/include" 
ignoring nonexistent directory "/usr/local/lib/gcc/
i686-pc-linux-gnu/3.4.0/../../../../i686-pc-linux-gnu/include" 
#include "..." search starts here: 
#include <...> search starts here: 
 /usr/local/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0 
 /usr/local/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/
i686-pc-linux-gnu 
 /usr/local/lib/gcc/i686-pc-linux-gnu/3.4.0/../../../../include/c++/3.4.0/
backward 
 /usr/local/include 
 /usr/local/lib/gcc/i686-pc-linux-gnu/3.4.0/include 
 /usr/include 
End of search list. 
GNU C++ version 3.4.0 20040309 (prerelease) (i686-pc-linux-gnu) 
        compiled by GNU C version 3.4.0 20040309 (prerelease). 
GGC heuristics: --param ggc-min-expand=64 --param ggc-min-heapsize=64274 
t.C:18: error: `int ACE_OS::sigaction(int, const sigaction*, sigaction*)' 
should have been declared inside `ACE_OS' 
t.C: In function `int ACE_OS::sigaction(int, const sigaction*, sigaction*)': 
t.C:19: error: invalid const_cast from type `const sigaction*' to type 
`sigaction*' 
 
source code t.C 
 
struct sigaction {}; 
 
extern int sigaction (int __sig, __const struct sigaction * __act, 
		      struct sigaction * __oact) throw (); 
 
 
namespace ACE_OS  
{ 
    extern int sigaction (int signum, 
			  const struct sigaction *nsa, 
			  struct sigaction *osa); 
} 
 
#if 1 
int ACE_OS::sigaction (int signum, 
		       const struct sigaction *nsa, 
		       struct sigaction *osa) 
{ 
    return ::sigaction (signum, const_cast<struct sigaction*> (nsa), osa); 
} 
#else 
int ACE_OS::sigaction (int signum, 
		       const struct ::sigaction *nsa, 
		       struct ::sigaction *osa) 
{ 
    return ::sigaction (signum, const_cast<struct ::sigaction*> (nsa), osa); 
} 
 
#endif

-- 
           Summary: Problem compiling ACE (sigaction)
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: schmid at snake dot iap dot physik dot tu-darmstadt dot
                    de
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=14509