There was a typo in the MacOSX section regarding the stacksize issue.

There's no limit command near as I can tell.  Should be the bash
builtin ulimit command.

README

@@ -455,10 +455,11 @@ Reliant UNIX: The thread support does not compile on Reliant UNIX, and
         platform as well.  This should be resolved in time for a
         future release.
 
-Mac OS X 10: One of the regular expression tests fails with a segmentation 
-        violation (SIGSEGV) due to the small stack size used by default,
-        if you give the command "limit stacksize 2048" before "make test"
-        it should work.
+MacOSX: The tests will crash on both 10.1 and 10.2 with SEGV in
+        test_re and test_sre due to the small default stack size.  Do
+        "ulimit -s 2048" before "make test" to avoid the failure.
+        Note that this is a built-in bash command so if you're using a
+        different shell, the command may be different too.
 
         On naked Darwin you may want to add the configure option
         "--disable-toolbox-glue" to disable the glue code for the Carbon