Re: FYI: fix-bootstrap-translation-download-on-darwin

[Gary V. Vaughan]

On Sep 6, 2007, at 2:19 PM, Ralf Wildenhues wrote:
> Hi Gary,

Hallo Ralf,

> Gary V. Vaughan <gary <at> gnu.org> writes:
> >         Work around a bug in darwin's awk:
>
> >         (func_get_translations): The first awk script mangles the last
> >         entry passed to it for at least the awk implementation shipped
> >         with Darwin 8.10.1.  Capture $3 into a variable too to work-
> >         around that problem.
>
> Could you be bothered to explain what this bug does?  I don't quite
> understand from the patch nor the description.  Should it be listed
> in the Autoconf shell portability section?

Sure.

$ cat in
cs:1.4o:../PO-files
da:1.4o:../PO-files
de:1.4o:../PO-files
el:1.4n:../PO-files
el:1.4o:../PO-files
fr:1.4o:../PO-files


# Before the patch (note the last line of output):

$ cat in | /opt/local/bin/gawk -F: '
>   { if (lang && $1 != lang) print lang, ver, $3 }
>   { lang = $1; ver = $2 }
>   END { if (lang) print lang, ver, $3 }'
cs 1.4o ../PO-files
da 1.4o ../PO-files
de 1.4o ../PO-files
el 1.4o ../PO-files
fr 1.4o ../PO-files
$ cat in | /usr/bin/awk -F: '
>   { if (lang && $1 != lang) print lang, ver, $3 }
>   { lang = $1; ver = $2 }
>   END { if (lang) print lang, ver, $3 }'
cs 1.4o ../PO-files
da 1.4o ../PO-files
de 1.4o ../PO-files
el 1.4o ../PO-files
fr 1.4o


# After the patch:

$ cat in | /opt/local/bin/gawk -F: '
>   { if (lang && $1 != lang) print lang, ver, subdir }
>   { lang = $1; ver = $2; subdir = $3 }
>   END { if (lang) print lang, ver, subdir }'
cs 1.4o ../PO-files
da 1.4o ../PO-files
de 1.4o ../PO-files
el 1.4o ../PO-files
fr 1.4o ../PO-files
$ cat in | /usr/bin/awk -F: '
>   { if (lang && $1 != lang) print lang, ver, subdir }
>   { lang = $1; ver = $2; subdir = $3 }
>   END { if (lang) print lang, ver, subdir }'
cs 1.4o ../PO-files
da 1.4o ../PO-files
de 1.4o ../PO-files
el 1.4o ../PO-files
fr 1.4o ../PO-files

It appears that only gawk saves $3 from the last input line for use  
in the END clause, where darwin awk (maybe others too, I haven't  
looked elsewhere) discards it.

Cheers,
        Gary
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