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Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? [message #37955 is a reply to message #37926]

Sat, 24 November 2012 20:21

Didier is currently offline

Didier
Messages: 680
Registered: November 2008
Location: France

Contributor

Hi wolfgang,

if you have U++ running on the Raspberry PI the half of the work is done : you all the bibs and the includes that you need to compile apps for the Raspberry PI.

Here is what I did to make a cross compile environment for the gumstix (ARM cortex-A8).

1 - Make a copy of /usr/lib and /usr/include from the Raspberry PI to you're computer ==> this is the easiest way to get all the compatible libs and includes.

2 - Compile a GCC suite for the ARM11
To do this I used open-embedded environnement. But you can try this
http://raspberrypi.stackexchange.com/questions/1/how-do-i-bu ild-a-gcc-4-7-toolchain-for-cross-compiling

3 - You need a correct U++ Build Method (xxx.BM files)
I have attached the one I use to cross compile towards cortex-A8
The important things to notice are :

gcc name ( arm-angstrom-linux-gnueabi-g++ in my case )
--sysroot=PATH_TO_COPIED_USR options added to compiler and linker (to tell gcc to use the wright libs)
path to the gcc bins directly set
-mcpu=cortex-a8 -mfpu=neon : options for cortex-A8
remove SSE2 form the default options (SSE2 is not part of ARM instructions set)

4 - Report the corrections made to Upp code (/Core/Config.h) : add __arm__

5 - Some Upp pitfalls/bugs on ARM to be aware of :
MT does not work : apps get stuck in infinite loop on start ==> I didn't have time to look into it

This should help you start up quickly

Attachment: GCC_ARM_example.bm
(Size: 2.01KB, Downloaded 233 times)

[Updated on: Sat, 24 November 2012 20:35]

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[Message index]

		Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Fri, 03 August 2012 13:25
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Didier on Fri, 03 August 2012 18:16
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: twkrimm on Tue, 07 August 2012 16:47
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: mirek on Tue, 07 August 2012 18:28
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Thu, 09 August 2012 15:30
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: mirek on Thu, 09 August 2012 20:04
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Fri, 10 August 2012 20:58
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: dolik.rce on Sat, 11 August 2012 10:50
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Sun, 12 August 2012 09:58
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: dolik.rce on Sun, 12 August 2012 11:20
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Sun, 12 August 2012 12:41
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Sun, 12 August 2012 21:39
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: dolik.rce on Sun, 12 August 2012 22:39
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Sat, 18 August 2012 16:37
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: dolik.rce on Sat, 18 August 2012 17:41
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Sat, 18 August 2012 22:07
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: dolik.rce on Sat, 18 August 2012 22:41
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: koldo on Sat, 18 August 2012 23:59
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: kohait00 on Tue, 04 September 2012 12:51
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Zbych on Tue, 04 September 2012 15:42
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: mirek on Tue, 04 September 2012 18:17
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Zbych on Tue, 04 September 2012 18:45
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: NilaT on Wed, 14 November 2012 21:11
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: dolik.rce on Wed, 14 November 2012 22:16
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: NilaT on Fri, 16 November 2012 08:05
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Wolfgang on Fri, 23 November 2012 20:49
		Re: Raspberry (Raspbian) - ARM 6 Core + Ultimate++? By: Didier on Sat, 24 November 2012 20:21

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