[omniORB] autoconf build problem on HP-UX - wrong alloca used

[Duncan Grisby]

On Monday 17 July, "Eric McMillan" wrote:

> I've been working on porting omniORB to HP-UX/Itanium, and ran into a
> problem when using configure to generate the build files.  It manifested as
> an error preprocessing ir.idl with omnicpp.  After much debugging, I found
> that it was the build of omnicpp that was the issue.  In the traditional
> build process, the config.h file includes the config-hpux.h file, which
> defines HAVE_ALLOCA and includes HP's <alloca.h>.  Configure doesn't set
> HAVE_ALLOCA or include <alloca.h>, so the omniORB supplied alloca.c is used.
> This doesn't work correctly on HP-UX/Itanium with aCC compiler 6.0 and
> beyond.  It looks like the routine to determine stack direction changes when
> compiled with optimization vs. no optimization.  The simple fix is to add
> HAVE_ALLOCA and the #include <alloca.h> to the acconfig.h file.  More
> generically, configure should test for alloca support and use the vendor
> supplied version, if available.  Minor changes will need to be made to both
> cccp.c and cexp.c to include <alloca.h> when configure determines it is
> available.

Can you provide a patch that makes it work for you?  The place to put
the #include <alloca.h> will be in config.h, not in the files that use
it.

Cheers,

Duncan.

-- 
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