Distributing your C++ Products

If you write code in HP aC++ and distribute any of the following C++ files to your customers, read all of the following sections for recommendations and legal requirements.

shared libraries containing C++ code (with the exception of /usr/lib/libCsup.sl, /usr/lib/libstd.sl, /usr/lib/librwtool.sl, and /usr/lib/libstream.sl which are provided as part of the HP-UX core system)
executable files produced by HP aC++ and applications that use shared libraries provided with HP aC++
object files produced by HP aC++
archived libraries containing C++ code

any combination of the above

NOTE: If you choose to distribute archive libraries or object files, your customer must have purchased HP aC++.

Strong Recommendations
Applications that use HP aC++ Shared Libraries
Linking Your HP aC++ Libraries with Other Languages
Installing your Application
HP aC++ Files You May Distribute
Terms for Distribution of HP aC++ Files

Strong Recommendations

We strongly recommend that you distribute your products in such a way that your customer does not need to use the HP aC++ compiler or driver. That is, only distribute executables and shared libraries.

Be sure your customer has read this distribution information.

NOTE: If you choose to distribute archive libraries or object files, your customer must have purchased HP aC++.

Applications that use HP aC++ Shared Libraries

This section explains what you need to do to ensure that your customers can use your code correctly.

The following HP aC++ run-time libraries are shipped as part of the HP-UX 11.x core system:

/usr/lib/libCsup.sl
/usr/lib/libstd.sl
/usr/lib/librwtool.sl
/usr/lib/libstream.sl
and the corresponding libraries in /usr/lib/pa20_64/

CAUTION: If you distribute either executable files or shared libraries as part of your product, you should not ship the above HP aC++ run-time libraries with your product in such a way that it results in overwriting a newer library version with an older, incompatible version. If you ship any HP aC++ run-time library, then it is your responsibility to ensure that an old library version is not installed over a new one.

Refer also to the CAUTION in the section Installing your Application.

Linking Your HP aC++ Libraries with Other Languages

This section discusses what you and your customers need to do if your product is an HP aC++ library to be called with another language.

The C++ language requires that nonlocal static objects be initialized before any function or object is used. HP aC++ initializes nonlocal static objects in all object files, including shared libraries, before the first statement in main() executes. If you distribute HP aC++ libraries that your customers will use, they must do the following to ensure that nonlocal static objects are correctly initialized and destroyed:

Your customer must have purchased HP aC++ and must link their code with the aCC command.
If your customer's main program is written in a language other than C++, your customer's main program must first call _main() before doing anything else. _main() calls all nonlocal static constructors.
NOTE: 64-bit mode differs from the above. In 64-bit mode, your code must not call _main.

If your libraries are C++ shared libraries, the above restrictions can be relaxed as follows:

_main() must still be called, before any use of aC++ code. It could be placed in the C++ library itself.
NOTE: 64-bit mode differs from the above. In 64-bit mode, your code must not call _main.

The a.out must be linked with:

/usr/lib/libcl.sl  (or on the link line -lcl)

Except when dynamically loading the C++ shared library, the a.out must be linked with the HP aC++ runtime libraries in the following order:
```
-lstd -lstream -lCsup -lm -lcl -ldld
```
If the library does not use libstd (STL) or libstream (iostreams), then they can be eliminated. If tools.h++ is used, then add -lrwtool to the left.

The following stub file needs to be linked into the shared library or every a.out. Assemble as follows:

as cpprt0_stub.s

cc -c cpprt0_stub.s

A copy of the stub file cpprt0_stub.s can be shipped.

================ cpprt0_stub.s ===================
        .code
; stubs for static constructors in a.out
	.export __StaticCtorTable_Start,data
        .export __StaticCtorTable_End,data
__StaticCtorTable_Start
__StaticCtorTable_End

	.data
; stubs for static constructors in a.out, compiled with +z/+Z
	.export __ZStaticCtorTable_Start,data
        .export __ZStaticCtorTable_End,data
__ZStaticCtorTable_Start
__ZStaticCtorTable_End

In addition, your customers should review Mixing C++ with other Languages for information on linking HP aC++ modules with HP C, HP Pascal, and HP FORTRAN 77.

NOTE: HP aC++ code cannot be mixed with HP C++ code.

Installing your Application

HP aC++ releases are usually forward compatible, but HP cannot guarantee that this will be true for all releases. If you have questions about the compatibility of HP aC++ releases, you should contact your HP support representative.

Normally your customer will already have the correct runtime installed. If your product requires a newer version, it is recommended that the customer install the latest patch.

Your application's installation procedure should install the appropriate HP aC++ components in the standard places on your customer's systems. This will ensure that the aCC command can find them.

CAUTION: If your customer already has HP aC++ installed and their version is newer than yours, you should never overwrite any of the existing HP aC++ components. In addition, you should not install your product on a system that has a newer version of HP aC++ if that newer version is incompatible with your version.

You should also warn your customers not to install a version of HP aC++ after installing your product if their version of HP aC++ is incompatible with your version.

HP aC++ Files You May Distribute

For this release, Hewlett-Packard grants you permission to package and redistribute the following subset of HP aC++ components to your customers. The following HP aC++ runtime libraries are provided as a patch to the HP-UX core system:

/usr/lib/libCsup.sl
/usr/lib/libstd.sl
/usr/lib/librwtool.sl
/usr/lib/libstream.sl
and the corresponding libraries in /usr/lib/pa20_64/

Refer to the CAUTION in the prior section Applications that use HP aC++ Shared Libraries.

Terms for Distribution of HP aC++ Files

Permission to distribute the above mentioned HP aC++ runtime shared libraries is based on the following terms and conditions:

These HP aC++ components cannot be redistributed as part of a C++ compiler, linker, or interpreter product.
All copyright notices in the code must be retained.
The HP aC++ executable components can only be redistributed by HP aC++ customers.
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