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List:       linuxppc-dev
Subject:    Gcc longcall option
From:       bogdan.diaconescu () motorola ! com (Diaconescu Bogdan-BDIACON1)
Date:       2003-07-25 16:14:48
Message-ID: DD38D67B9196D31189EC00508B62563701CA64B5 () zro01exm01 ! corp ! mot ! com
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Thanks,
I'll try gcc-3.3 version whith the pragm you said.

Bogdan

-----Original Message-----
From: Franz Sirl [mailto:Franz.Sirl-ppc at lauterbach.com]
Sent: Thursday, July 24, 2003 2:11 PM
To: Diaconescu Bogdan-BDIACON1
Cc: linuxppc-dev at lists.linuxppc.org
Subject: Re: Gcc longcall option


At 17:34 22.07.2003, Diaconescu Bogdan-BDIACON1 wrote:

>Hi guys,
>
>I have a question not strictly related to kernel but more related to
>gcc and it's options.
>
>I try to create a big exe image (around 800M with symbolics) using
>gcc-2.95.x and I run into the problems of relative branch addressing
>which has only 24 bits for PPC. I know if I use some __atribute__
>((longcall)) for function prototypes the addressing is done through LR
>so it's changed to indirect branch. I was looking for options like
>-mlongcall or -mlong-calls but it seems they don't exist for PPC.
>
>Now the question: do you know a distribution in which gcc is having
>such options or do you know another way to get the link done with the
>big exe image I have?

Starting with gcc-3.3 there is "#pragma longcall (1)", so depending on
where you put this pragma, you can default your project/module/file to
longcalls.

Franz.

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