fix for compiling on ppc64le, bug #69744 at https://bugs.php.net/bug.php?id=69744 #97
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I tried using
%2
instead of specifying register r0, but for some reason kept getting errors like:also added top-level Makefile for the impatient, and added a few clues to the README. there are a lot of errors compiling under PHP7.0; many functions now use different numbers of args.