server/mpm/config.m4 has this check with a hard-coded path to APR:
APR_CHECK_APR_DEFINE(APR_HAS_THREADS, srclib/apr)
This fails if APR is anywhere else and config doesn't think APR has thread support.
Is this macro busted and should be replaced with something that does a test compile using the current $INCLUDES in $CPPFLAGS?
Yes. $INCLUDES should contain the APR includes by that time. -- justin