Paul,
Thanks for your suggestion.
If I understand you correctly, I should use something like AC_COMPILE_IFELSE
with the code with a redefine as you specified, right?
Something like:
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <time.h>
extern time_t foo;
extern long long int foo;]],[[]])],time_fmt="%lld",
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <time.h>
extern time_t foo;
extern long int foo;]],[[]])],time_fmt="%ld",time_fmt="-")
)
On 23/10/20 14:16, Paul Eggert wrote:
> On 10/22/20 6:09 PM, Russell Shaw wrote:
>> else if(sizeof(time_t) == sizeof(long int)) {
>
> This is not the right kind of test. You want to test whether time_t and int
> are the same types, not whether they're the same size. To do that, you should
> use code like this:
>
> extern time_t foo;
> extern long int foo;
>
> Of course this means you'll need to compile N programs rather than one, but
> that's life in the big Autoconf city.
>
