On 9/30/22 1:45 AM, Xi Ruoyao wrote:
[Resend because the previous one was rejected due to my bad SPF setting]
On Thu, 2022-09-29 at 11:19 -0400, Chet Ramey wrote:
On 9/28/22 11:25 PM, Xi Ruoyao wrote:
(Sorry for cross posting, but the topic is related to both side)
In Bash-5.2 there is a change:
"ff. Some fixes to how subshells modify $SHLVL."
The single change affects pipelines for which bash optimizes out a
second
fork, so it doesn't decrement $SHLVL twice. It comes from this 2020
report:
https://lists.gnu.org/archive/html/help-bash/2020-10/msg00012.html
(the ssh aspect of this report is a red herring).
Hmm, it makes sense but I can't see how this affects autoconf test suite
(I don't really understand M4).
It might also be the result of a different change that optimizes out some
unnecessary forks; there are a couple of those. I'm not sure why autoconf
is keeping track of SHLVL anyway, unless it's recording state.
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU chet@xxxxxxxx http://tiswww.cwru.edu/~chet/
