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Annotation of OpenXM_contrib/gc/Mac_files/MacOS_config.h, Revision 1.1.1.1

1.1       maekawa     1: /*
                      2:        MacOS_config.h
                      3:
                      4:        Configuration flags for Macintosh development systems.
                      5:
                      6:        <Revision History>
                      7:
                      8:        11/16/95  pcb  Updated compilation flags to reflect latest 4.6 Makefile.
                      9:
                     10:        by Patrick C. Beard.
                     11:  */
                     12: /* Boehm, November 17, 1995 12:10 pm PST */
                     13:
                     14: #ifdef __MWERKS__
                     15:
                     16: // for CodeWarrior Pro with Metrowerks Standard Library (MSL).
                     17: // #define MSL_USE_PRECOMPILED_HEADERS 0
                     18: #include <ansi_prefix.mac.h>
                     19: #ifndef __STDC__
                     20: #define __STDC__ 0
                     21: #endif
                     22:
                     23: #endif /* __MWERKS__ */
                     24:
                     25: // these are defined again in gc_priv.h.
                     26: #undef TRUE
                     27: #undef FALSE
                     28:
                     29: #define ALL_INTERIOR_POINTERS  // follows interior pointers.
                     30: #define SILENT                 // no collection messages.
                     31: //#define DONT_ADD_BYTE_AT_END // no padding.
                     32: //#define SMALL_CONFIG         // whether to use a smaller heap.
                     33: #define NO_SIGNALS             // signals aren't real on the Macintosh.
                     34: #define USE_TEMPORARY_MEMORY   // use Macintosh temporary memory.
                     35:
                     36: // CFLAGS= -O -DNO_SIGNALS -DSILENT -DALL_INTERIOR_POINTERS
                     37: //
                     38: //LIBGC_CFLAGS= -O -DNO_SIGNALS -DSILENT \
                     39: //    -DREDIRECT_MALLOC=GC_malloc_uncollectable \
                     40: //    -DDONT_ADD_BYTE_AT_END -DALL_INTERIOR_POINTERS
                     41: //   Flags for building libgc.a -- the last two are required.
                     42: //
                     43: // Setjmp_test may yield overly optimistic results when compiled
                     44: // without optimization.
                     45: // -DSILENT disables statistics printing, and improves performance.
                     46: // -DCHECKSUMS reports on erroneously clear dirty bits, and unexpectedly
                     47: //   altered stubborn objects, at substantial performance cost.
                     48: //   Use only for incremental collector debugging.
                     49: // -DFIND_LEAK causes the collector to assume that all inaccessible
                     50: //   objects should have been explicitly deallocated, and reports exceptions.
                     51: //   Finalization and the test program are not usable in this mode.
                     52: // -DSOLARIS_THREADS enables support for Solaris (thr_) threads.
                     53: //   (Clients should also define SOLARIS_THREADS and then include
                     54: //   gc.h before performing thr_ or GC_ operations.)
                     55: //   This is broken on nonSPARC machines.
                     56: // -DALL_INTERIOR_POINTERS allows all pointers to the interior
                     57: //   of objects to be recognized.  (See gc_priv.h for consequences.)
                     58: // -DSMALL_CONFIG tries to tune the collector for small heap sizes,
                     59: //   usually causing it to use less space in such situations.
                     60: //   Incremental collection no longer works in this case.
                     61: // -DLARGE_CONFIG tunes the collector for unusually large heaps.
                     62: //   Necessary for heaps larger than about 500 MB on most machines.
                     63: //   Recommended for heaps larger than about 64 MB.
                     64: // -DDONT_ADD_BYTE_AT_END is meaningful only with
                     65: //   -DALL_INTERIOR_POINTERS.  Normally -DALL_INTERIOR_POINTERS
                     66: //   causes all objects to be padded so that pointers just past the end of
                     67: //   an object can be recognized.  This can be expensive.  (The padding
                     68: //   is normally more than one byte due to alignment constraints.)
                     69: //   -DDONT_ADD_BYTE_AT_END disables the padding.
                     70: // -DNO_SIGNALS does not disable signals during critical parts of
                     71: //   the GC process.  This is no less correct than many malloc
                     72: //   implementations, and it sometimes has a significant performance
                     73: //   impact.  However, it is dangerous for many not-quite-ANSI C
                     74: //   programs that call things like printf in asynchronous signal handlers.
                     75: // -DOPERATOR_NEW_ARRAY declares that the C++ compiler supports the
                     76: //   new syntax "operator new[]" for allocating and deleting arrays.
                     77: //   See gc_cpp.h for details.  No effect on the C part of the collector.
                     78: //   This is defined implicitly in a few environments.
                     79: // -DREDIRECT_MALLOC=X causes malloc, realloc, and free to be defined
                     80: //   as aliases for X, GC_realloc, and GC_free, respectively.
                     81: //   Calloc is redefined in terms of the new malloc.  X should
                     82: //   be either GC_malloc or GC_malloc_uncollectable.
                     83: //   The former is occasionally useful for working around leaks in code
                     84: //   you don't want to (or can't) look at.  It may not work for
                     85: //   existing code, but it often does.  Neither works on all platforms,
                     86: //   since some ports use malloc or calloc to obtain system memory.
                     87: //   (Probably works for UNIX, and win32.)
                     88: // -DNO_DEBUG removes GC_dump and the debugging routines it calls.
                     89: //   Reduces code size slightly at the expense of debuggability.