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coRpTitan
n00b
Joined: 21 Aug 2005
Posts: 55
Location: Czech Republic, Brno
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 Posted: Wed Feb 15, 2012 12:14 pm Post subject: ARM: change of CHOST in /etc/make.conf |
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Hello,
I'm preparing Gentoo OS for new device(will be based on arm1176jzf-s CPU).
I've created QEMU with this CPU:
| Code: | | qemu-system-arm -kernel gentoo_kernel -M versatilepb -cpu arm1176 -hda rootfs.ext4 -hdb swap.swap -m 256 -append "root=/dev/sda loglevel=7" -serial stdio |
Then I installed following stage3: armv5tel. I know that my CPU is armv6, but when I used armv6 stage3 machine didn't booted up. So I decided to use stage3 for armv5tel and change CHOST as well as CLAGS to compile it for my CPU.
My problem is that when I change some values in /etc/make.conf and run emerge --info it still shows me old values. When I do the same on Gentoo machine where I have i686 and put into /etc/make.conf for example i999 and run emerge --info then it will print me new value(999) for CHOST.
Is there any specific procedure how I can change CHOST on ARM architecture? Do I need to execute some special command to apply changes I made to /etc/make.conf on ARM?
P.S.: I was following: http://www.gentoo.org/doc/en/change-chost.xml and there is only mentioned to edit /etc/make.conf and then re-compile gcc,binutils,glibc.
Thank you for help.
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jannis
Guru
Joined: 05 Dec 2004
Posts: 340
Location: Germany / Bavaria / Aschaffenburg
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| Posted: Mon Feb 27, 2012 10:11 am Post subject: |
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| Let me guess: Raspberry Pi? |
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xaviermiller
Bodhisattva
Joined: 23 Jul 2004
Posts: 8720
Location: ~Brussels - Belgique
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| Posted: Mon Feb 27, 2012 11:20 am Post subject: |
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Hello,
The CHOST change is only valable for compatible architectures (e.g. switching from a i386 to a i686, or changing the vendor tag). I don't know if it would work for ARM architectures.
IMHO the best way is to create a new cross-compile environment and cross-build a simple chroot.
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Xavier Miller |
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fikiz
Apprentice
Joined: 07 Mar 2005
Posts: 282
Location: Italy
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| Posted: Tue Feb 28, 2012 11:27 am Post subject: |
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coRpTitan,
may I ask you how did you compile the kernel for qemu?
I was able to compile a kernel chroot-ing into a gentoo stage3-armv4tl following this guide:
http://www.gentoo.org/proj/en/base/embedded/handbook/?part=1&chap=5
But qemu-system-arm won't boot my kernel, and I'm thinking I've chosen some wrong kernel options.
Could you show me your .config file?
thanks. |
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coRpTitan
n00b
Joined: 21 Aug 2005
Posts: 55
Location: Czech Republic, Brno
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| Posted: Sat Mar 10, 2012 8:06 am Post subject: |
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| jannis wrote: | | Let me guess: Raspberry Pi? |
Correct :]
fikiz:
Basically I've been following this example: http://www.cnx-software.com/2011/10/18/raspberry-pi-emulator-in-ubuntu-with-qemu/
Differences were: I used emerge to get qemu, not downloading sources manually and install.
Kernel config is here: https://data.tntwrk.info/rasp_config
If you want to use this one, be sure you will modify at least CONFIG_CROSS_COMPILE - this is where I have stored my cross compile tools.
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jannis
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Joined: 05 Dec 2004
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Location: Germany / Bavaria / Aschaffenburg
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Gentoo on Alternative Architectures
