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

[Eric Blake]

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Adding autoconf, replies can drop m4-patches

According to Gary V. Vaughan on 9/11/2007 1:15 PM:

Hi Gary,

>>>
>>>       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?

I don't see this problem mentioned in autoconf.texi, so it looks like we
have some editing to do...

> 
> 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
> 
> 

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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