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Re: ABI baseline update and build-many-glibcs.
- From: Joseph Myers <joseph at codesourcery dot com>
- To: Carlos O'Donell <carlos at redhat dot com>
- Cc: GNU C Library <libc-alpha at sourceware dot org>
- Date: Mon, 26 Nov 2018 16:56:00 +0000
- Subject: Re: ABI baseline update and build-many-glibcs.
- References: <email@example.com>
On Mon, 26 Nov 2018, Carlos O'Donell wrote:
> Do we think that we should run 'make update-all-abi' during
> build-many-glibcs in order to look for errors or changes in
> the ABI baselines?
build-many-glibcs.py should never modify the glibc source tree.
Right now, it creates a copy of the source tree, but that's because the
build might try to write into the source tree if file timestamps are in
the wrong order. I intend to make it touch more files at checkout time,
and then remove the copying after doing further tests that all relevant
files get touched (builds with a read-only source tree with all files
having different timestamps in some arbitrary order except for the touched
files, and then with the reverse of that order except for the touched
files, to ensure no relevant dependencies causing source file rebuilds
have been missed).
The copying is not a good thing; it can actually introduce transient build
failures, if the checkout step results in an automatic "git gc", which is
still running when the copying takes place, resulting in the copying
failing because files in .git vanished during the copying.
Joseph S. Myers