This is important, because the system checks will yield different
results depending on whether POSIX threads are enabled or not.
We also use PTHREADS_CFLAGS only in ZTS mode now. Using these flags
in non-ZTS mode causes complete build failures on some platforms
(i.e. FreeBSD 2.2.x). This will cause harmless warnings on some
platforms (i.e. Solaris 2).
- added support for externally built modules,
- improved support for in-tree shared modules,
- fixed diversion bugs,
- configure displays some informative messages,
- faster static build
(libtool isn't used anymore for compiling non-PIC objects),
- dependencies comparable to automake's without requiring GNU make or GCC,
- working make clean for non-GNU makes.
