Re: AC_PROG_CC_C99

[Roger Leigh]

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Paul Eggert <address@hidden> writes:

> Roger Leigh <address@hidden> writes:
>
>> One change I've made is added arguments to AC_PROG_CC_C89,
>> AC_PROG_CC_C89 and AC_PROG_CC_STDC to allow custom code to run on
>> success or failure, to e.g. abort configure if there isn't a C99
>> compiler available.
>
> I'd rather avoid this complexity.  Isn't it easy enough to abort based
> on the value of ac_cv_prog_cc_c89 (or whatever)?

Yes, but I didn't know if users were allowed access to those
internals.  I've reverted this (but kept it for internal use).

> Can you please also check for the following features?
>
>   variable declarations in for loops
>   last member of a struct may be an incomplete array type
>   varargs macros
>   named initialization of structs
>   variable length arrays
>   long long
>
> These are all features that C99-ish programs are likely to want.
>
>> +# AC_PROG_CC_STDC ([ACTION-IF-AVAILABLE], [ACTION-IF-UNAVAILABLE])
>> +# ----------------------------------------------------------------
>> +AC_DEFUN([AC_PROG_CC_STDC],
>> +[AC_PROG_CC_C99([$1], [$2])])
>
> This isn't quite right.  It should try for C99 mode, and failing that
> it should try for C89 mode.

I've made the above changes, additions and updates NEWS and
autoconf.texi.  A diff against the current CVS is attached.


Regards,
Roger

- -- 
Roger Leigh
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rl-autoconf-c99-2.diff
Description: C99 patch take 2