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Re: [PATCH] config.sub: Work around command assignment bug in some shell
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From: |
Karl Berry |
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Subject: |
Re: [PATCH] config.sub: Work around command assignment bug in some shells. |
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Date: |
Fri, 13 Aug 2021 16:41:38 -0600 |
When combining variable assignments with a shell command, some older
shells (notably heirloom-sh and presumably also Solaris 10 /bin/sh)
Just to confirm: Solaris 10 /bin/sh does indeed also have this bug.
sparcsol$ /bin/sh -c 'x=good; x=bad :; echo $x'
bad
$ uname -a
SunOS sparcsol 5.10 Generic_150400-48 sun4v sparc SUNW,T5240
Debian 11 dash apparently does also, which seems surprising to me. But
that's what the sparc-debian machine I have access to seems to be saying
(/bin/sh is a symlink to dash as usual):
sparcdeb$ /bin/sh -c 'x=good; x=bad :; echo $x'
bad
sparcdeb$ cat /etc/issue
Debian GNU/Linux 11 \n \l
sparcdeb$ uname -a
Linux sparcdeb 5.10.0-8-sparc64-smp #1 SMP Debian 5.10.46-2 (2021-07-20)
sparc64 GNU/Linux
(Not that it matters, particularly.) --thanks, karl.