Re: nested [] with whitespace in misc description leads to _m4_text_wrap_word errors

[Eric Blake]

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According to Mike Frysinger on 10/18/2009 1:17 AM:
> some packages like to use [] in their desc and rather than use quadrigraphs, 
> 
> $ cat configure.ac
> AC_INIT
> AC_ARG_VAR(VAR, [[cow moo] desc])
> AC_OUTPUT
> 
> $ autoconf
> configure:1210: error: possibly undefined macro: _m4_text_wrap_word

Thanks for the report.  The regression came at commit b07a2b3d, when I
swapped to a more efficient whitespace mapping operator, and nothing in
the testsuite exercises it (yet).  I'm still playing with it, but I'm
hoping that I can do a cleanup pass that recognizes any whitespace inside
extra [ ] during _m4_split, and skip replacing just those instances.

http://git.savannah.gnu.org/cgit/autoconf.git/commit/?id=b07a2b3d

> if there is no white space between the [], then things actually work and the 
> output is what people expect:
> AC_INIT
> AC_ARG_VAR(VAR, [[cow-moo] desc])
> AC_OUTPUT
> $ autoconf && ./configure --help | grep cow-moo
>   VAR         [cow-moo] desc

Correct, as is the use of quadrigraphs instead of raw [ and ].

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

Eric Blake             address@hidden
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