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Re: Help about how to bootstrap gcc with local version glibc other than system one

From: Jeff Law <law at redhat dot com>
To: "Bin.Cheng" <amker dot cheng at gmail dot com>
Cc: Andreas Schwab <schwab at linux-m68k dot org>, "gcc at gcc dot gnu dot org" <gcc at gcc dot gnu dot org>
Date: Mon, 22 Feb 2016 12:15:49 -0700
Subject: Re: Help about how to bootstrap gcc with local version glibc other than system one
Authentication-results: sourceware.org; auth=none
References: <CAHFci2-MGvGREn85cu91U_KT0bqsgMuCWsfON42u5ENJaiaH4w at mail dot gmail dot com> <87egcwxpzi dot fsf at linux-m68k dot org> <CAHFci2_ZLQeZUqDYknkL7Gey7vxy6asDvn=E+v3Fu58V1_CaYQ at mail dot gmail dot com> <56AFB5F2 dot 10007 at redhat dot com> <CAHFci2_k05NxUoVsXhMpdQ7TDDq_f=zEEe_6NZa7YrubU2mibw at mail dot gmail dot com>

On 02/22/2016 11:52 AM, Bin.Cheng wrote:

Hi,
I still don't quite follow this method.  If I pop up chroot
environment with new glibc, it's still possible that the new glibc
isn't compatible with the default gcc in chroot.  Won't this a
chicken-egg problem because we want to build our gcc against new glibc
in the first place?

If there's a fundamental incompatibility, then you have to bootstrap,similar to bootstrapping a new architecture. That's rarely the case though.

Most of the time it's sufficient to use mock or similar tools in thismanner to build a new glibc or new gcc. You can then repeat using thejust built glibc or gcc to catch any secondary effects.



jeff

References:
- Help about how to bootstrap gcc with local version glibc other than system one
  - From: Bin.Cheng
- Re: Help about how to bootstrap gcc with local version glibc other than system one
  - From: Andreas Schwab
- Re: Help about how to bootstrap gcc with local version glibc other than system one
  - From: Bin.Cheng
- Re: Help about how to bootstrap gcc with local version glibc other than system one
  - From: Jeff Law
- Re: Help about how to bootstrap gcc with local version glibc other than system one
  - From: Bin.Cheng

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