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From: elaexuotee--- via Bug reports for GNU Guix <bug-guix@gnu.org>
To: Maxim Cournoyer <maxim.cournoyer@gmail.com>
Cc: 40641@debbugs.gnu.org,
	"pelzflorian \(Florian Pelz\)" <pelzflorian@pelzflorian.de>
Subject: bug#40641: Building from git breaks when /bin/sh isn't bash
Date: Sun, 10 Jul 2022 19:13:24 +0900	[thread overview]
Message-ID: <33RZXP6OBFFCS.22N5QDGK5AQQA@"@WILSONB.COM> (raw)
In-Reply-To: <87mtdhftw7.fsf@gmail.com>

CONFIG_SHELL simply acts as a user override; it's not part of autoconf's core
logic. That role belongs to the SHELL macro, who's picks the first available of
the following:

- CONFIG_SHELL environment variable,
- SHELL environment variable, or
- /bin/sh

See autoconf's m4sugar/m4sh.m4 for the gory details. Arguably, this should
also be updated to point to a fixed /bin/sh output fallback.

Anyway, AM_SUBST_NOTMAKE([SHELL]), cf. '(automake) Optional', simply tells
automake to not define SHELL inside the generated Makefile. This means that
make will instead use it's default, which in our case is hard-coded to the
/bin/sh in its implicit bash-minimal dependency. For detailed info about this
behaviour of make, see '(make) Choosing the Shell'. Note, however, you will
have to do a mental sed-replace of "/bin/sh" with "<bash-minimal>/bin/sh" when
reading that page.


Cheers,
B.




  reply	other threads:[~2022-07-10 10:14 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-04-15  9:06 bug#40641: Building from git breaks when /bin/sh isn't bash elaexuotee--- via Bug reports for GNU Guix
2020-04-15 12:21 ` pelzflorian (Florian Pelz)
2020-04-17 14:57   ` elaexuotee--- via Bug reports for GNU Guix
2022-06-10  0:34     ` Maxim Cournoyer
2022-06-13 14:40       ` pelzflorian (Florian Pelz)
2022-06-14 16:09         ` Maxim Cournoyer
2022-06-21  0:20           ` elaexuotee--- via Bug reports for GNU Guix
2022-06-21  9:02             ` pelzflorian (Florian Pelz)
2022-07-04 11:22               ` elaexuotee--- via Bug reports for GNU Guix
     [not found]               ` <62c2cd89.1c69fb81.7ad72.92c8SMTPIN_ADDED_BROKEN@mx.google.com>
2022-07-07 21:52                 ` Maxim Cournoyer
2022-07-08  8:53                   ` pelzflorian (Florian Pelz)
2022-07-08  8:58                     ` pelzflorian (Florian Pelz)
2022-07-08  9:51                     ` elaexuotee--- via Bug reports for GNU Guix
2022-07-10  4:56                     ` Maxim Cournoyer
2022-07-10 10:13                       ` elaexuotee--- via Bug reports for GNU Guix [this message]
     [not found]                       ` <62caa649.1c69fb81.5b288.1112SMTPIN_ADDED_BROKEN@mx.google.com>
2022-07-10 19:55                         ` Maxim Cournoyer
2022-07-11 13:48                           ` Maxim Cournoyer
2022-07-19  4:14                             ` elaexuotee--- via Bug reports for GNU Guix
2022-07-21 15:29                               ` Maxim Cournoyer

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