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diff --git a/gc-7.2/Mac_files/MacOS_Test_config.h b/gc-7.2/Mac_files/MacOS_Test_config.h
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+/*
+	MacOS_Test_config.h
+	
+	Configuration flags for Macintosh development systems.
+	
+	Test version.
+	
+ 	<Revision History>
+
+ 	11/16/95  pcb  Updated compilation flags to reflect latest 4.6 Makefile.
+	
+	by Patrick C. Beard.
+ */
+/* Boehm, November 17, 1995 12:05 pm PST */
+
+#ifdef __MWERKS__
+
+// for CodeWarrior Pro with Metrowerks Standard Library (MSL).
+// #define MSL_USE_PRECOMPILED_HEADERS 0
+#include <ansi_prefix.mac.h>
+#ifndef __STDC__
+#define __STDC__ 0
+#endif
+
+#endif
+
+// these are defined again in gc_priv.h.
+#undef TRUE
+#undef FALSE
+
+#define ALL_INTERIOR_POINTERS	// follows interior pointers.
+//#define SILENT				// want collection messages.
+//#define DONT_ADD_BYTE_AT_END	// no padding.
+//#define SMALL_CONFIG			// whether to a smaller heap.
+#define NO_SIGNALS				// signals aren't real on the Macintosh.
+#define USE_TEMPORARY_MEMORY	// use Macintosh temporary memory.
+
+// CFLAGS= -O -DNO_SIGNALS -DALL_INTERIOR_POINTERS -DSILENT
+//
+//LIBGC_CFLAGS= -O -DNO_SIGNALS -DSILENT \
+//    -DREDIRECT_MALLOC=GC_malloc_uncollectable \
+//    -DDONT_ADD_BYTE_AT_END -DALL_INTERIOR_POINTERS
+//   Flags for building libgc.a -- the last two are required.
+//
+// Setjmp_test may yield overly optimistic results when compiled
+// without optimization.
+// -DSILENT disables statistics printing, and improves performance.
+// -DCHECKSUMS reports on erroneously clear dirty bits, and unexpectedly
+//   altered stubborn objects, at substantial performance cost.
+//   Use only for incremental collector debugging.
+// -DFIND_LEAK causes the collector to assume that all inaccessible
+//   objects should have been explicitly deallocated, and reports exceptions.
+//   Finalization and the test program are not usable in this mode.
+// -DSOLARIS_THREADS enables support for Solaris (thr_) threads.
+//   (Clients should also define SOLARIS_THREADS and then include
+//   gc.h before performing thr_ or GC_ operations.)
+//   This is broken on nonSPARC machines.
+// -DALL_INTERIOR_POINTERS allows all pointers to the interior
+//   of objects to be recognized.  (See gc_priv.h for consequences.)
+// -DSMALL_CONFIG tries to tune the collector for small heap sizes,
+//   usually causing it to use less space in such situations.
+//   Incremental collection no longer works in this case.
+// -DLARGE_CONFIG tunes the collector for unusually large heaps.
+//   Necessary for heaps larger than about 500 MB on most machines.
+//   Recommended for heaps larger than about 64 MB.
+// -DDONT_ADD_BYTE_AT_END is meaningful only with
+//   -DALL_INTERIOR_POINTERS.  Normally -DALL_INTERIOR_POINTERS
+//   causes all objects to be padded so that pointers just past the end of
+//   an object can be recognized.  This can be expensive.  (The padding
+//   is normally more than one byte due to alignment constraints.)
+//   -DDONT_ADD_BYTE_AT_END disables the padding.
+// -DNO_SIGNALS does not disable signals during critical parts of
+//   the GC process.  This is no less correct than many malloc 
+//   implementations, and it sometimes has a significant performance
+//   impact.  However, it is dangerous for many not-quite-ANSI C
+//   programs that call things like printf in asynchronous signal handlers.
+// -DGC_OPERATOR_NEW_ARRAY declares that the C++ compiler supports the
+//   new syntax "operator new[]" for allocating and deleting arrays.
+//   See gc_cpp.h for details.  No effect on the C part of the collector.
+//   This is defined implicitly in a few environments.
+// -DREDIRECT_MALLOC=X causes malloc, realloc, and free to be defined
+//   as aliases for X, GC_realloc, and GC_free, respectively.
+//   Calloc is redefined in terms of the new malloc.  X should
+//   be either GC_malloc or GC_malloc_uncollectable.
+//   The former is occasionally useful for working around leaks in code
+//   you don't want to (or can't) look at.  It may not work for
+//   existing code, but it often does.  Neither works on all platforms,
+//   since some ports use malloc or calloc to obtain system memory.
+//   (Probably works for UNIX, and win32.)
+// -DNO_DEBUG removes GC_dump and the debugging routines it calls.
+//   Reduces code size slightly at the expense of debuggability.