[Bug driver/15940] New: implicit link against libstdc++ fails if -b used

["harri dot pasanen at trema dot com" <gcc-bugzilla at gcc dot gnu dot org>]

Take a bogus file, say t1.c: 
 
int foob() { return 42; } 
 
and compile it to object. 
 
bash-2.05a$ gcc -fPIC -c t1.c -o t1.o 
 
Now try making a shared library of it: 
 
bash-2.05a$ g++ -fPIC -shared  -o t1.sl t1.o 
bash-2.05a$ ldd t1.sl 
        /opt/gcc33/lib/libgcc_s.sl =>   /opt/gcc33/lib/libgcc_s.sl 
        /usr/lib/libc.2 =>      /usr/lib/libc.2 
        /usr/lib/libdld.2 =>    /usr/lib/libdld.2 
        /usr/lib/libc.2 =>      /usr/lib/libc.2 
        /usr/lib/libm.2 =>      /usr/lib/libm.2 
        /opt/gcc33/lib/libstdc++.sl.5 =>        /opt/gcc33/lib/libstdc++.sl.5 
        /usr/lib/libc.2 =>      /usr/lib/libc.2 
        /work/harri/gcc-build/gcc/libgcc_s.sl =>        /opt/gcc33/lib/./libgcc_s.sl 
        /usr/lib/libm.2 =>      /usr/lib/libm.2 
 
It worked, implicitly picking up libstdc++ because g++ was used. 
 
But if I add "-b hppa2.0w-hp-hpux11.00", libstdc++ is no longer picked up: 
 
bash-2.05a$ g++ -b hppa2.0w-hp-hpux11.00 -fPIC -shared  -o t1.sl t1.o 
bash-2.05a$ ldd t1.sl 
        /opt/gcc33/lib/libgcc_s.sl =>   /opt/gcc33/lib/libgcc_s.sl 
        /usr/lib/libc.2 =>      /usr/lib/libc.2 
        /usr/lib/libdld.2 =>    /usr/lib/libdld.2 
        /usr/lib/libc.2 =>      /usr/lib/libc.2 
bash-2.05a$  
 
My gcc: 
 
bash-2.05a$ g++ -v 
Reading specs from /opt/gcc33/lib/gcc-lib/hppa2.0w-hp-hpux11.00/3.3.3/specs 
Configured with: ../gcc-3.3.3/configure --prefix=/opt/gcc33 -with-gnu-as 
-with-as=/opt/gcc33/bin/as --enable-threads=posix --enable-languages=c,c++ 
Thread model: posix 
gcc version 3.3.3 
 
binutils 2.15: 
 
bash-2.05a$ as --version 
GNU assembler 2.15 
 
This used to work correctly with gcc 3.2 on HP-UX.

-- 
           Summary: implicit link against libstdc++ fails if -b used
           Product: gcc
           Version: 3.3.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: driver
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: harri dot pasanen at trema dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=15940