custom internal toolchain/glibc

custom internal toolchain/glibc

[Robert Berger]

Hi,

I was wondering what's the process if someone wanted to use, say Jethro
or Krogoth, but with different/custom versions of gcc, binutils, glibc
e.g. to cook some syscalls and to compile ancient Linux kernels.

I came across tcmode-default.inc[1] where such things are defined:

GCCVERSION ?= "6.1%"
SDKGCCVERSION ?= "${GCCVERSION}"
BINUVERSION ?= "2.26%"
GDBVERSION ?= "7.11%"
GLIBCVERSION ?= "2.24"
UCLIBCVERSION ?= "1.0%"
LINUXLIBCVERSION ?= "4.4"

Would hacking/duplicating and hacking this be a good starting point?

With TCMODE I could get poky to pick up some external toolchain, but I
would like it to build a custom one instead.

Please advise.

Thanks,

Robert

[1]
http://git.yoctoproject.org/cgit/cgit.cgi/poky/tree/meta/conf/distro/include/tcmode-default.inc..."My
employer doesn't even agree with me about C indentation style." - Used
as a disclaimer

My public pgp key is available,at:
http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x90320BF1

Re: custom internal toolchain/glibc

[Burton, Ross]

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On 20 July 2016 at 18:30, Robert Berger <gmane@reliableembeddedsystems.com>
wrote:

> I was wondering what's the process if someone wanted to use, say Jethro
> or Krogoth, but with different/custom versions of gcc, binutils, glibc
> e.g. to cook some syscalls and to compile ancient Linux kernels.
>
> I came across tcmode-default.inc[1] where such things are defined:
>
> GCCVERSION ?= "6.1%"
> SDKGCCVERSION ?= "${GCCVERSION}"
> BINUVERSION ?= "2.26%"
> GDBVERSION ?= "7.11%"
> GLIBCVERSION ?= "2.24"
> UCLIBCVERSION ?= "1.0%"
> LINUXLIBCVERSION ?= "4.4"
>
> Would hacking/duplicating and hacking this be a good starting point?
>

Absolutely - if you provide your own gcc/binutils/etc recipes then these
are the variables to change to use them.  It's not unusual for oe-core to
ship with more than one GCC version for example.

Ross

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Re: custom internal toolchain/glibc

[Khem Raj]

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> On Jul 20, 2016, at 11:31 AM, Burton, Ross <ross.burton@intel.com> wrote:
> 
> 
> On 20 July 2016 at 18:30, Robert Berger <gmane@reliableembeddedsystems.com <mailto:gmane@reliableembeddedsystems.com>> wrote:
> I was wondering what's the process if someone wanted to use, say Jethro
> or Krogoth, but with different/custom versions of gcc, binutils, glibc
> e.g. to cook some syscalls and to compile ancient Linux kernels.
> 
> I came across tcmode-default.inc[1] where such things are defined:
> 
> GCCVERSION ?= "6.1%"
> SDKGCCVERSION ?= "${GCCVERSION}"
> BINUVERSION ?= "2.26%"
> GDBVERSION ?= "7.11%"
> GLIBCVERSION ?= "2.24"
> UCLIBCVERSION ?= "1.0%"
> LINUXLIBCVERSION ?= "4.4"
> 
> Would hacking/duplicating and hacking this be a good starting point?
> 
> Absolutely - if you provide your own gcc/binutils/etc recipes then these are the variables to change to use them.  It's not unusual for oe-core to ship with more than one GCC version for example.
> 

Looks at meta-linaro how they do it

> Ross
> --
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> yocto mailing list
> yocto@yoctoproject.org
> https://lists.yoctoproject.org/listinfo/yocto


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