topic Questions about GCC in Operating System - Linux

Questions about GCC

Vadim Yezhakov — Wed, 05 Apr 2006 04:38:19 GMT

1. Can i use shared libraries compiled on aCC in binaries compiled on GCC?
2.Can i compile 64-bit objects on GCC?

Re: Questions about GCC

H.Merijn Brand (procura — Wed, 05 Apr 2006 04:42:33 GMT

1. Yes
2. What architecture?

on PA-RISC, you need two gcc compilers: one for 32bit generation, and one for 64bit generation. They do not mix.

on Itanium, there is only one compiler, which is able to generate both.

To see all available options:

# gcc -v --help

Enjoy, Have FUN! H.Merijn

Re: Questions about GCC

Arunvijai_4 — Wed, 05 Apr 2006 04:44:36 GMT

Hi Vadim,

1. Can i use shared libraries compiled on aCC in binaries compiled on GCC?

Yes, You can do it.

2. Can i compile 64-bit objects on GCC?

Ofcourse, Yes.

You need to have a 64 bit GCC for this. You can download from

http://h21007.www2.hp.com/dspp/tech/tech_TechSoftwareDetailPage_IDX/1,1703,7663,00.html

-Arun

Re: Questions about GCC

Muthukumar_5 — Wed, 05 Apr 2006 04:55:11 GMT

1. Can i use shared libraries compiled on aCC in binaries compiled on GCC?

You can use that.

2.Can i compile 64-bit objects on GCC?

Based on the platform you can use. See model command output to see whether you machine is PA-RISC or Itanium.

64 bit gcc compiler is available for PA-RISC to support 64 bit.

--
Muthu

Re: Questions about GCC

Arunvijai_4 — Wed, 05 Apr 2006 05:15:47 GMT

Hello Vadim,

To compile 64 bit in GCC,

PA-RISC, you can install 64 bit compiler,

/usr/local/gcc64/bin/gcc as your compiler.

IA64, -mlp64 with GCC.

-Arun

Re: Questions about GCC

Vadim Yezhakov — Wed, 05 Apr 2006 05:34:31 GMT

And one more question:
function names in GCC and aCC objects are different.
I must use extern "C" directive or i can use some key in compiler?

Re: Questions about GCC

Arunvijai_4 — Wed, 05 Apr 2006 05:56:58 GMT

Hi Vadim,

You can use Key-in Directives for the portability.

-Arun

Re: Questions about GCC

Arunvijai_4 — Wed, 05 Apr 2006 06:03:27 GMT

Hi Vadim,

You can also check these threads for more information,

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=36827
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=726526

-Arun

Re: Questions about GCC

Steve Ellcey — Wed, 05 Apr 2006 19:25:55 GMT

Just to clarify a point, when you say GCC do you mean the GCC C compiler only? Mixing GCC C code with aCC is fine but you cannot mix code compiled with the g++ compiler with code compiled with the aCC compiler. I.e. you can only use one C++ compiler but you can use it with code compiled with either the GNU or HP C compilers or both.

GCC (all uppercase) is usually interpreted as the GNU Compiler Collection, which includes both C and C++ compilers. gcc (lowercase) is the GCC C language compiler.

Re: Questions about GCC

Vadim Yezhakov — Wed, 05 Apr 2006 23:50:06 GMT

I mean just g++ compiler. And code, compiled by aCC is C++ too.

Re: Questions about GCC

Steve Ellcey — Thu, 06 Apr 2006 09:53:28 GMT

I am afraid you are out of luck then. There is no way to combine C++ code compiled with aCC with C++ code compiled with g++. On PA, the two compilers have completely different ABI's (different name mangling), and on both PA and IPF the two compilers have different runtime libraries. Each compiler only works with its own runtime library and you can't link in both C++ runtime libraries into one executable.