Complete build options for Pthread API

[elfring]

Would you like to add the configuration script "AX_PTHREAD" to your build specification?

[kmcdonell]

Seems like AX_PTHREAD needs ax_pthread.m4 to have been previously installed.
We're reluctant to add even more dependencies into the the build process, so unless (a) I've misunderstood something about making AX_PTHREAD work, or (b) there is some demonstrable problem with the way the existing PCP configure.ac probes for pthread availability, I think the status quo will prevail.

I'm closing this issue, please re-open if (a) or (b) apply.

[elfring]

Would you like to improve your software builds by reusing current macros from the GNU autoconf archive?

[kmcdonell]

Unless there is something broken in the current autoconf use with PCP, I don't understand how pulling in another build dependency "improves" our builds.