OK, I have to partially correct myself here ...
On Sunday 16 October 2011, Stefano Lattarini wrote:
>
> This won't work with older versions of the Almquist shell (without
> prepending `testid' and `git_p4_test_start' with a `$', that is):
>
> $ ash-0.5.2 -c 'a=4; b=2; echo $(( 1 + (a - b) ))'
> ash-0.5.2: arith: syntax error: " 1 + (a - b) "
>
OTOH, this behaviour seems in contrast with the POSIX standard, which
says that:
``If the shell variable x contains a value that forms a valid integer
constant, then the arithmetic expansions "$((x))" and "$(($x))" shall
return the same value.''
Reference:
<http://pubs.opengroup.org/onlinepubs/009695399/utilities/xcu_chap02.html#tag_02_06_04>
So, since the git testsuite explicitly requires a POSIX shell, there is
probably nothing to fix here.
Sorry for the noise,
Stefano
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