[Gc] Doc about USE_MMAP and USE_MUNMAP

Romano Paolo Tenca rotenca at telvia.it
Tue Jul 3 01:54:15 PDT 2007

 From Makefile.direct

# -DUSE_MMAP use MMAP instead of sbrk to get new memory.
#   Works for Solaris and Irix.
# -DUSE_MUNMAP causes memory to be returned to the OS under the right
#   circumstances.  This currently disables VM-based incremental collection.
#   This is currently experimental, and works only under some Unix,
#   Linux and Windows versions.

This is a little confusing because USE_MUNMAP requires USE_MMAP.
Under Windows, I can use:


to make UNMAP work.


Romano Paolo Tenca

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