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Annotation of 43BSDReno/contrib/emacs-18.55/etc/APOLLO, revision 1.1.1.1

1.1       root        1: The Apollo has a bizarre operating system which does not permit
                      2: Emacs to be dumped with preloaded pure Lisp code.  Therefore, each
                      3: time you start Emacs on this system, the standard Lisp code is loaded
                      4: into it.  Expect it to take a long time.  You can prevent loading of
                      5: the standard Lisp code by specifying the -nl switch.  It must
                      6: come at the beginning of the command line; only the -t and -batch
                      7: switches may come before it.
                      8: 
                      9: You must use m-apollo.h in the config.h file, together with
                     10: s-bsd4.2.h.
                     11: 
                     12: There is one remaining problem on the Apollo.  You must replace
                     13: the CPP line in src/Makefile with "CPP = /usr/lib/cpp".
                     14: The C preprocessor lives there rather than in /lib/cpp because the
                     15: Aegis OS uses the /lib directory as the repository for shared libraries.
                     16: 
                     17: 
                     18: Here is a design for a method of dumping and reloading the relevant
                     19: necessary impure areas of Emacs.
                     20: 
                     21: On dumping, you need to dump only the array `pure' plus the
                     22: locations that contain values of forwarded Lisp variables or that are
                     23: protected for garbage collection.  The former can be found by a
                     24: garbage- collection-like technique, and the latter are in the
                     25: staticprolist vector (see alloc.c for both things).
                     26: 
                     27: Reloading would work in an Emacs that has just been started; except
                     28: when a switch is specified to inhibit this, it would read the dump
                     29: file and set all the appropriate locations.  The data loaded must be
                     30: relocated, but that's not hard.  Those locations that are of type
                     31: Lisp_Object can be found by a technique like garbage-collection, and
                     32: those of them that point to storage can be relocated.  The other data
                     33: read from the file will not need to be relocated.
                     34: 
                     35: The switch to inhibit loading the data base would be used when it
                     36: is time to dump a new data base.
                     37: 
                     38: This would take a few seconds, which is much faster than loading
                     39: the Lisp code of Emacs from scratch.

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