[Bug c/35761] New: GCC 4.3.0 tar 1.19 and glibc 2.7 bug with __cplusplus and -O2

["devilsclaw at devilsclaws dot net" <gcc-bugzilla at gcc dot gnu dot org>]

I'm currently compiling my linux based of the Linux From Scratch SVN.

I decided to try my hand at compiling with the gcc 4.3.0.

The current bug im noticing has to do with the -O2 flag and __cplusplus.

I have done a search through the bug database all most errors that I have seen
have had __cplusplus in the part of the program that failed.

One of the programs that I tried to compile was tar 1.18 and 1.19. It would not
compile because of the -O2 flag, when I removed it from the config script and
reconfigured it compiled fine.

The same thing happened with the glibc and the problem was in the conftest
which had a __cplusplus and a exception throw.

With LFS the first part of the compiling process is to only comprile the C
compiler part of gnu compiler yet im not sure why __cplusplus would be
returning true if there is not a C++ compiler.


-- 
           Summary: GCC 4.3.0 tar 1.19 and glibc 2.7 bug with __cplusplus
                    and -O2
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: devilsclaw at devilsclaws dot net


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35761