> I suppose you mean change about like this.

Yes. - Your approach comes very close to my imaginations.

I suggest to reconsider a few implementation details there.


> The macro figures out how to build C programs using POSIX threads, and
> the PTHREAD_CFLAGS output variable to any special C compiler flags that
> are needed.

1. How do you think about to mention in your commit message that three
variables (including "LIBS") will be adjusted eventually?


> +AX_PTHREAD([], [AC_MSG_ERROR([Could not configure pthreads support])])

2. You chose to pass an empty "ACTION-IF-FOUND". Would it make sense to
restructure this place a bit in the configuration script so that the
following statements will be directly used by the first macro parameter?

Regards,
Markus