Conference turris::c_plus_plus

Hello All,

We develop an application on a V3.2D system and use it on other
V3.2 systems.

Recently I installed C++ V5.3 to solve problems with Third Degree,
we were then able to solve memory leaks.

But then, our executable did not work any more on other systems,
starting one of these has the following results :

# namon_server
1516:namon_server: /sbin/loader: Error: unresolvable symbol in namon_server: __cxx_gem_dispatch
1516:namon_server: /sbin/loader: Fatal Error: this executable has unresolvable symbols

Even worse, the libdecnet_stub.so against which we link the namon_server file doesn't
seems to work anymore ? Because when linking with decnet.so, everything is fine.

Can you help ?


The only solution we found, was to link statically the executable, which worked fine except
for the libdecnet_stub library. But then we face another problem : We have to provide a
shareable library ! How can we link it so that we can distribute executable using it as
a shared library ?


Thanks in advance for your help.


Regards,
Cedric.

PS : 


Here is information from the systems we use :

Development system:
# setld -i | grep CXX
 (I removed any uninstalled kits)
ATMCXXSHLIB350  installed       C++ Shared Libraries for Atom (Software Development)
CXXBASE530      installed       DEC C++ (cxx) for Digital UNIX
CXXHDRA132      installed       DEC C++ headers for DEC OSF/1 AXP Systems
CXXILDA132      installed       DEC Incremental linker (ild)
CXXLIB530       installed       DEC C++ static class libraries
CXXMAN530       installed       DEC C++ and class library manual pages
CXXOLDA510      installed       DEC C++ old packages: oldc89 and ild
CXXSHRDA307     installed       DEC C++ Class Library, Run-Time Support
CXXTASKA132     installed       DEC C++ task library
CXXV3HDR530     installed       DEC C++ header files for Digital UNIX V3.x


Test system:
migbin# setld -i | grep CXX
CXXSHRDA305     installed       DEC C++ shared libraries

I tried this on our V3.2 system, which does not have the problem described:

% nm /usr/lib/cmplrs/cxx/libcxx.so | grep cxx_gem_dispatch
__cxx_gem_dispatch               | 0004395929625760 | T | 0000000000000008

% nm /usr/lib/cmplrs/cxx/libcxx.a | grep cxx_gem_dispatch
__cxx_gem_dispatch               | 0000000000004496 | T | 0000000000000008

You should see it in both the static and the shared library.


It is possible that one of the other subsets (ATMCXXSHLIB350, for example) may
have overwritten the original libcxx.so.

I believe that if CXXSHRDA307 is installed, you should be able to build shared
executables using DEC C++ V5.3 and later on Digital UNIX V3.2.

Post more info or send me mail, if you are still having problems.

-Jeff

Thanks for your reply.

Re. 10

Does that means that the shared executable I built will work on any V3.2
systems with or without CXXSHRDA307 (with previous versions) ?

Regards,
Cerdric.

If you compile with V5.3 or later, you need to have
CXXSHRDA307 installed on the target system in order
to run the program on it.

          The CXXSHRDA307 subset on the DEC C++ Version 5.5 kit
          includes updated run-time sharable libraries (the RTLs).
          This subset must be installed to use DEC C++ Version 5.5
          on Digital UNIX Version 3.n systems. Executables that
          are linked with the -call_shared command line option
          (the default) and that contain code generated by DEC C++
          Version 5.5 can only be run on Digital UNIX Version 3.n
          systems on which CXXSHRDA307 or a later version has been
          installed.

          If you want to run C++ programs on other Digital UNIX
          Version 3.n systems, you can link specifying cxx -non_
          shared. Programs linked in this manner can be run on
          other systems that do not have CXXSHRDA307 or later
          installed.

          The CXXSHRDA307 subset can be restributed under
          conditions stated in the Software Product Description.

Many thanks for the information.

I understood, reading previous replies that this software was free ?
Otherwise, where can I find the SPD ?

Regards,
Cedric.

There is no charge for restributing CXXSHRDA307.

You can find the SPD via:

http://tlg-www.zko.dec.com/public/cxxc/dcxxc-kits.html

CXXSHRDA307 is only needed for Digital UNIX versions
prior to V4.0.

Thanks a lot.

You were very helpful.

Regards,
Cedric.