Hi,

We have to port our application from PA RISC to Itanium. We are using
aCC compiler. Can I get list of aCC flags that are used for PA-RISC
systems but not usable on IPF systems. Like +DD64 would be used for
PA-RISC but not for IPF. List of such aCC flags... to avoid possible
aCC pitfalls while porting.

Thanks
Alok

chugh_alok@hotmail.com wrote:
> We have to port our application from PA RISC to Itanium. We are using
> aCC compiler. Can I get list of aCC flags that are used for PA-RISC
> systems but not usable on IPF systems. Like +DD64 would be used for
> PA-RISC but not for IPF. List of such aCC flags... to avoid possible
> aCC pitfalls while porting.

I suspect there is something akin to such a writeup at
devresource.hp.com or the DSPP.

In the specific case of +DD64, that flag _is_ used on both PA-RISC and
IPF. The "compile 64 bit" flag that would be PA-specific would be
+DA2.0w. FWIW, the default compilation mode on HP-UX/IPF is still
32-bit.

rick jones
--
The glass is neither half-empty nor half-full. The glass has a leak.
The real question is "Can it be patched?"
these opinions are mine, all mine; HP might not want them anyway...
feel free to post, OR email to rick.jones2 in hp.com but NOT BOTH...

chugh_alok@hotmail.com wrote:
> We have to port our application from PA RISC to Itanium. We are using
> aCC compiler. Can I get list of aCC flags that are used for PA-RISC
> systems but not usable on IPF systems. Like +DD64 would be used for
> PA-RISC but not for IPF. List of such aCC flags... to avoid possible
> aCC pitfalls while porting.

There are many software transition tools available at
http://devrsrc1.external.hp.com/STK/

The specific list of cc and aCC flags that are not supported on
IPF is available at
http://devrsrc1.external.hp.com/STK/impacts/i745.html

The biggest single change in moving from aCC on PA-RISC to IPF is the
change of the default mode from -AP to -AA. That is change from a
classic C++ runtime to standard C++ runtime. Both settings are
available on both PA-RISC and IPF. The default changes going to IPF.
You can't mix the two settings in one process. Your code and all the
c++ libraries that you link with must match. So which one you use
might be dictated by the mode used by third party libraries that need.
The change is discussed in detail at
http://h21007.www2.hp.com/dspp/tech/...1,5520,00.html

That is one of many topics covered by links off of the aC++ home page at
http://h21007.www2.hp.com/dspp/tech/...3,1740,00.html

--
Mike Stroyan, mike.stroyan@hp.com

Thanks very much!!

: We have to port our application from PA RISC to Itanium. We are using
: aCC compiler. Can I get list of aCC flags that are used for PA-RISC
: systems but not usable on IPF systems. Like +DD64 would be used for
: PA-RISC but not for IPF. List of such aCC flags... to avoid possible
: aCC pitfalls while porting.

The simplest way is to just compile on IPF and look at the driver warnings.
But Mike has a good pointer.

Though that is old and now +u# and +Ofailsafe have been implemented for
some time.