Re: regression in autoconf 2.65 ?

[Eric Blake]

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According to Vincent Torri on 11/28/2009 2:22 AM:
> AC_DEFUN([ECORE_CHECK_MODULE],
> [
> m4_pushdef([UP], m4_toupper([[$1]]))dnl
> m4_pushdef([DOWN], m4_tolower([[$1]]))dnl

Lose the extra quotes.  Per the NEWS, m4_toupper and m4_tolower now
properly quote their expansion.  So you need:

m4_pushdef([UP], m4_toupper([$1]))dnl
m4_pushdef([DOWN], m4_tolower([$1]))dnl

and everything else should fall into place.  For example,

> 
> have_ecore_[]m4_defn([DOWN])=no

with the extra quotes, this line was producing
have_ecore_foo[foo]=no
instead of the intended
have_ecore_foo=no

Sorry that this is a backwards-incompatible change, but we did document
it, and it makes m4_toupper more consistent with other m4sugar text
manipulation macros, in that it does not spuriously cause macro expansion
of the resulting text if the case-change happens to name an existing macro.

In order to write a configure.ac script that will work with both 2.64 and
younger, and with 2.65, you will need a wrapper function.  Here's one way
to write it:

m4_pushdef([AAA],[BBB])dnl
m4_if(m4_toupper([aaa]),[BBB],
  [m4_define([my_toupper],[m4_toupper([[$1]])])],
  [m4_copy([m4_toupper], [my_toupper])])
m4_popdef([AAA])

and likewise for m4_tolower; then use my_toupper instead of m4_toupper.

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

Eric Blake             address@hidden
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