Bash compatibility TODO

[David Laight]

From: Aaro Koskinen
> Sent: 27 June 2022 21:43
> 
> Hi all,
> 
> Looks like it's not possible to build mainline Linux anymore with the
> busybox as "bash". :-(

Have you posted that to LKML ?
They really ought to solve the problem a different way.

	David

> 
> $ make
>   CC      scripts/mod/empty.o
> ./scripts/check-local-export: line 17: shopt: not found
> make[1]: *** [scripts/Makefile.build:249: scripts/mod/empty.o] Error 127
> make[1]: *** Deleting file 'scripts/mod/empty.o'
> make: *** [Makefile:1199: prepare0] Error 2
> 
> It seems the requirement is to support "lastpipe" option:
> 
> 	# Run the last element of a pipeline in the current shell.
> 	# Without this, the while-loop would be executed in a subshell, and
> 	# the changes made to 'symbol_types' and 'export_symbols' would be lost.
> 	shopt -s lastpipe
> 
> and I don't think these will work either:
> 
> 	declare -A symbol_types
> 	declare -a export_symbols
> 
> A.
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