Re: Better error message for old-style AC_LANG

[Akim Demaille]

>>>>> "Pavel" == Pavel Roskin <address@hidden> writes:

Pavel> Hello, Akim!
>> Well, I should have first branched my brains on.  I'm not in favor
>> of AC_LANG_CASE, and I see no reason for someone to depend upon
>> AC_LANG.
>> 
>> Could you detail what issue you are addressing?

Pavel> In the project guile-core, file acinclude.m4 we can find the
Pavel> following line:

Pavel> ifelse(AC_LANG, CPLUSPLUS, [#ifdef __cplusplus ...

I'd like to see more of the code to understand their needs.

Pavel> What should be recommend to the Guile team?  How do we warn
Pavel> people doing such things?

I don't know.  Let's first see why they had to do such hacks.  Maybe
the macro you're listing is a replacement of an AC_CHECK_FUNC or
whatever, where us, the Autoconf team, indeed worked a lot to fix the
many bug 2.13 has.  So maybe they simply don't need anything else but
a good C++ support in Autoconf.  2.50 shall be enough then, without
any public dispatching/casing macro.