Re: autoheader an AC_DEFINE

[aotto]

Hi,

I had 2 problems:

1. my AC_DEFINE was only in the positive AS_IF state and the default #undef was 
chosen for the negative state
     → Solution: As mentioned, add a variable and remove AC_DEFINE from the 
condition

2. the AC_DEFINE does not use the variable, the AC_DEFINE_UNQUOTED has done the 
job.

it is fine now.

thanks.


On 02.09.22 21:40, Zack Weinberg wrote:
> On Fri, Sep 2, 2022, at 2:03 PM, aotto wrote:
> > Hi,
> >
> > I use autoconf to config my application. My problem is that I require a
> > macro with
> >
> >       #define NAME 1
> >
> > or
> >
> >       #define NAME 0
> >
> > autoconf / autoheader uses for '#define NAME 0' the value '#undef NAME'
> This ought to work:
>
> AS_IF([test x"$ac_cv_condition_for_NAME" = xyes],
>   [AC_DEFINE([NAME], [1], [Explanation of NAME.])],
>   [AC_DEFINE([NAME], [0], [Explanation of NAME.])])
>
> And so should this:
>
> AS_IF([test x"$ac_cv_condition_for_NAME" = xyes],
>    [value_NAME=1],
>    [value_NAME=0])
> AC_DEFINE_UNQUOTED([NAME], [$value_NAME], [Explanation of NAME.])
>
> If neither of those works, we're going to need to see a self-contained 
> configure.ac that demonstrates exactly what you're trying to do, because the 
> problem must be more complicated than just how you're using AC_DEFINE.
>
> zw