Libstdc++.sl and exceptions handling on HP-UX 11 (gcc-2.95.2)

[Greg M]

I compiled gcc-2.95.2 on HP-UX 11 using

configure --with-gnu-as --enable-shared --enable-threads

make install placed libstdc++.a.2.10.0 and libstdc++.sl into
/usr/local/bin

I am trying to compile a simple exception handling test:

cat conftest.C

class Ex { };

int main ()
{
  try {
    throw Ex();
    return 1;
  } catch (Ex &ex) {
    return 0;
  } catch (...) {
    return 1;
  }
}

the binary produced by
c++ -o conftest -g  -fexceptions conftest.C -L/usr/local/lib -Wl,-B,deferred

produces a core dump doing __eh_alloc();
I also noticed that __eh_alloc is defined in libgcc.a and
(duplicated ?) in libstc++.sl (three times).

The chatr shows that I linked with libstc++.sl :

chatr conftest
conftest:
         shared executable
         shared library dynamic path search:
             SHLIB_PATH     disabled  second
             embedded path  disabled  first  Not Defined
         shared library list:
             dynamic   /usr/local/lib/libstdc++.sl
             dynamic   /usr/lib/libm.2
             dynamic   /usr/lib/libc.2
         shared library binding:
             deferred
         global hash table disabled
         plabel caching disabled
global hash array size:1103
global hash array nbuckets:3
         shared vtable support disabled
         static branch prediction disabled
         executable from stack: D (default)
         kernel assisted branch prediction enabled
         lazy swap allocation disabled
         text segment locking disabled
         data segment locking disabled
         data page size: D (default)
         instruction page size: D (default)

If I link with the static library like:

c++ -o conftest -g  -fexceptions conftest.C  -Wl,-B,deferred

chatr conftest
conftest:
         shared executable
         shared library dynamic path search:
             SHLIB_PATH     disabled  second
             embedded path  disabled  first  Not Defined
         shared library list:
             dynamic   /usr/lib/libm.2
             dynamic   /usr/lib/libc.2
         shared library binding:
             deferred
         global hash table disabled
         plabel caching disabled
global hash array size:1103
global hash array nbuckets:3
         shared vtable support disabled
         static branch prediction disabled
         executable from stack: D (default)
         kernel assisted branch prediction enabled
         lazy swap allocation disabled
         text segment locking disabled
         data segment locking disabled
         data page size: D (default)
         instruction page size: D (default)

the binary works OK.

I also noticed that the HP Software Archive binaries are built and
distributed without libstdc++.sl

I have not seen any references to the problems with libstdc++.sl
and exceprion handling on HP.

I would appreciate any advise on what am I doing wrong.

Thanks,

Greg M


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