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Annotation of OpenXM_contrib2/asir2000/gc/doc/README.MacOSX, Revision 1.1

1.1     ! noro        1: While the GC should work on MacOS X Server, MacOS X and Darwin, I only tested
        !             2: it on MacOS X Server.
        !             3: I've added a PPC assembly version of GC_push_regs(), thus the setjmp() hack is
        !             4: no longer necessary. Incremental collection is supported via mprotect/signal.
        !             5: The current solution isn't really optimal because the signal handler must decode
        !             6: the faulting PPC machine instruction in order to find the correct heap address.
        !             7: Further, it must poke around in the register state which the kernel saved away
        !             8: in some obscure register state structure before it calls the signal handler -
        !             9: needless to say the layout of this structure is no where documented.
        !            10: Threads and dynamic libraries are not yet supported (adding dynamic library
        !            11: support via the low-level dyld API shouldn't be that hard).
        !            12:
        !            13: The original MacOS X port was brought to you by Andrew Stone.
        !            14:
        !            15:
        !            16: June, 1 2000
        !            17:
        !            18: Dietmar Planitzer
        !            19: dave.pl@ping.at
        !            20:
        !            21: Note from Andrew Begel:
        !            22:
        !            23: One more fix to enable gc.a to link successfully into a shared library for
        !            24: MacOS X. You have to add -fno-common to the CFLAGS in the Makefile. MacOSX
        !            25: disallows common symbols in anything that eventually finds its way into a
        !            26: shared library. (I don't completely understand why, but -fno-common seems to
        !            27: work and doesn't mess up the garbage collector's functionality).