RE: [ECOS] Recommended Version of GCC

RE: [ECOS] Recommended Version of GCC

[Jay Foster]

For what it's worth, I too am using gcc 3.4.3 for ARM7TDMI.  I switched from
3.2.1 because 3.2.1 had a bug that generated incorrect ARM code.  I forget
the details now.  Inlining also works with 3.4.3.

Jay

-----Original Message-----
From: Birahim Larou Fall [mailto:BLFall@scmmicro.fr]
Sent: Friday, May 12, 2006 2:05 AM
To: Moussa A. Ba
Cc: ecos-discuss@ecos.sourceware.org
Subject: Re: [ECOS] Recommended Version of GCC


I use this version (gcc 3.4.3) for ARM7TDMI and ARM9TDMI:
$ arm-elf-gcc --version
arm-elf-gcc (GCC) 3.4.3
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. 
I have no problem with this version. May be you can find better.

Fall Birahim




"Moussa A. Ba" <mba@embedded-zone.com> 
Sent by: ecos-discuss-owner@ecos.sourceware.org
11/05/2006 18:29

To
ecos-discuss@ecos.sourceware.org
cc

Subject
[ECOS] Recommended Version of GCC






I am about to port ecos to an Oki eval board, ARM7TDMI, which version of 
GCC do you recommend I use.  Should I just use the one distributed from 
the stable ecos release or can I use a more recent version from 
www.gnuarm.com or codesourcery.com

Moussa

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss




-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

[ECOS] Two minor memory allocation issues

[Andy Jackson]

I've just been experimenting with memory allocation (malloc and friends) on 
eCos and have spotted two minor issues:

1. A malloc request for 0x7FFFFFFF bytes succeeds and allocates a small 
amount of memory. Reducing the request to 0x7FFFFFF0 causes it to fail as 
expected. My guess is that this is a function of the allocation padding 
calculation, but I haven't got time at present to investigate further.

2. In the reference manual section 'eCos Memory Pools' on the page for 
'stdlib malloc Pools, the prototype for calloc is given as:

void *calloc(size_t size);

but looking in stdlib.h it appears that it should be:

void *calloc(size_t nmemb, size_t size);

    Andy..



-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

Re: [ECOS] Two minor memory allocation issues

[Andrew Lunn]

On Tue, May 16, 2006 at 11:15:02AM +0100, Andy Jackson wrote:
> I've just been experimenting with memory allocation (malloc and friends) on 
> eCos and have spotted two minor issues:
> 
> 1. A malloc request for 0x7FFFFFFF bytes succeeds and allocates a small 
> amount of memory. Reducing the request to 0x7FFFFFF0 causes it to fail as 
> expected. My guess is that this is a function of the allocation padding 
> calculation, but I haven't got time at present to investigate further.

It looks like internally dlmalloc is using cyg_int32 to represent
size. There is a macro request2size() which does arithmatic on the
size and 0x7FFFFFFF it is probably wrapping around to negative and so
it allocates the minimal amount of space. 

 
> 2. In the reference manual section 'eCos Memory Pools' on the page for 
> 'stdlib malloc Pools, the prototype for calloc is given as:
> 
> void *calloc(size_t size);

Yes, this is wrong. I will update the documentation.

     Andrew

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

Re: [ECOS] Recommended Version of GCC

[Birahim Larou Fall]

I use this version (gcc 3.4.3) for ARM7TDMI and ARM9TDMI:
$ arm-elf-gcc --version
arm-elf-gcc (GCC) 3.4.3
Copyright (C) 2004 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. 
I have no problem with this version. May be you can find better.

Fall Birahim




"Moussa A. Ba" <mba@embedded-zone.com> 
Sent by: ecos-discuss-owner@ecos.sourceware.org
11/05/2006 18:29

To
ecos-discuss@ecos.sourceware.org
cc

Subject
[ECOS] Recommended Version of GCC






I am about to port ecos to an Oki eval board, ARM7TDMI, which version of 
GCC do you recommend I use.  Should I just use the one distributed from 
the stable ecos release or can I use a more recent version from 
www.gnuarm.com or codesourcery.com

Moussa

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss




-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

Re: [ECOS] Recommended Version of GCC

[Andrew Lunn]

On Thu, May 11, 2006 at 12:29:26PM -0400, Moussa A. Ba wrote:
> I am about to port ecos to an Oki eval board, ARM7TDMI, which version of 
> GCC do you recommend I use.  Should I just use the one distributed from 
> the stable ecos release or can I use a more recent version from 
> www.gnuarm.com or codesourcery.com

The version you can download from the eCos site is known to work
well. All the eCos tests have been carried out with it. 

Newer verrsions of gcc have not been tested in the same way. However
users do use the newer versions of gcc and have not reported problems.

So the choice is yours.....

   Andrew

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss

[ECOS] Recommended Version of GCC

[Moussa A. Ba]

I am about to port ecos to an Oki eval board, ARM7TDMI, which version of 
GCC do you recommend I use.  Should I just use the one distributed from 
the stable ecos release or can I use a more recent version from 
www.gnuarm.com or codesourcery.com

Moussa

-- 
Before posting, please read the FAQ: http://ecos.sourceware.org/fom/ecos
and search the list archive: http://ecos.sourceware.org/ml/ecos-discuss