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
