97883 – www/mod_bw 0.7 doesn't work on 4.x due to patch in files/

	The mod_bw port contains a single patch in files/, which includes
	some very strange code:

+#if APR_MAJOR_VERSION == 0
+#define        apr_atomic_set32(mem,val)       (atomic_set_32(mem,val),mem)
+#define        apr_atomic_inc32(mem)           (atomic_add_32(mem,1),mem)
+#define        apr_atomic_dec32(mem)           (atomic_subtract_32(mem,1),mem)
+#define        apr_atomic_add32(mem,val)       (atomic_add_32(mem,val),mem)
+#define apr_atomic_cas32               apr_atomic_cas
+#endif

	This was introduced when the port was upgraded to 0.7.

	This code, simply put, does not work with Apache 2.2.2 on
	FreeBSD 4.x.  The end result is that mod_bw finds missing symbol
	references to the atomic_*_32() functions, because they aren't
	available on 4.x.

	The native apr_atomic_*32() functions come with Apache 2.2.2, and
	these work fine on 4.x.  What I'm saying is, on 4.x, all I have
	to do is remove the patch in files/ and mod_bw works.

	We need to have this fixed, and it's quite important.  I'd recommend
	that the patch only be applied on 5.x and 6.x systems, since it's
	not necessary on 4.x boxes.

Fix: 

See description.
How-To-Repeat: 	On a 4.x box, build mod_bw, then try to run Apache with the module
	loaded.  You'll receive missing symbol definitions for atomic_*_32()
	functions.