Date: Mon, 6 Mar 2000 12:09:02 -0500 From: Chet Ramey <chet@nike.ins.cwru.edu> To: jhix@mindspring.com Cc: Doug@gorean.org, hackers@FreeBSD.ORG Subject: Re: empty lists in for Message-ID: <1000306170902.AA22857.SM@nike.ins.cwru.edu>
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> Even though it's my preferred shell, I certainly wouldn't say
> that Bash is any sort of standard, certainly not in the POSIX
> sense.
Bash implements the POSIX.2 standard, with certain well-defined
exceptions (`posix mode').
> Imagine processing a possibly empty list constructed from a
> 'make' expansion... Without this behavior one would have to
> code a guard of some sort around the 'for' construct.
The idiomatic solution for this sort of thing is changing
your makefile recipes from
for f in ${SUBDIRS} do ...
to
sh_subdirs=${SUBDIRS}; for f in $$sh_subdirs ; do ...
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
( ``Discere est Dolere'' -- chet)
Chet Ramey, CWRU chet@po.CWRU.Edu http://cnswww.cns.cwru.edu/~chet/
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