[M3devel] What is going on with m3-sys/m3cc/gcc-4.7.gcc/m3cg?

[Rodney M. Bates]

After cvs update, in the head, if I edit m3-sys/m3cc/gcc-4.7/gcc/m3cg/parse.c,  I see

rodney at allegheny:~/proj/m3/cm3-new/cm3/m3-sys/m3cc/gcc-4.7/gcc/m3cg$ ll
total 792
-rw-r--r-- 1 rodney rodney   1276 2011-05-19 10:58 config-lang.in
-rw-r--r-- 1 rodney rodney   1357 2006-09-01 18:16 lang.opt
-rw-r--r-- 1 rodney rodney   1524 2003-01-05 17:19 lang-options.h
-rw-r--r-- 1 rodney rodney   1002 2006-09-01 18:16 lang-specs.h
-rw-r--r-- 1 rodney rodney  12875 2013-02-08 09:49 m3cg.h
-rw-r--r-- 1 rodney rodney  11847 2010-11-15 04:09 m3-def.h
-rw-r--r-- 1 rodney rodney   2273 2011-05-19 10:58 m3gty43.h
-rw-r--r-- 1 rodney rodney    756 2013-02-08 09:49 m3-parse.h
-rw-r--r-- 1 rodney rodney   3497 2013-05-09 11:46 Make-lang.in
-r--r--r-- 1 rodney rodney 183226 2013-07-01 17:13 parse.c
-rw-r--r-- 1 rodney rodney 182831 2013-05-09 13:10 parse.c.~1~
-rw-r--r-- 1 rodney rodney 182831 2013-07-01 17:11 parse.c.~2~
-rw-r--r-- 1 rodney rodney 182831 2013-07-01 17:11 parse.c.temp

where parse.c is changed.

When I recompile, (using scripts/do-cm3-front.sh), I see parse.c being recompiled, and

rodney at allegheny:~/proj/m3/cm3-new/cm3/m3-sys/m3cc/AMD64_LINUX/gcc/m3cg$ ls -l
total 1944
-rw-r--r-- 1 rodney rodney 1982736 2013-07-01 17:14 parse.o
rodney at allegheny:~/proj/m3/cm3-new/cm3/m3-sys/m3cc/AMD64_LINUX/gcc/m3cg$ strings parse.o | grep parse.c
../../gcc-4.7/gcc/m3cg/parse.c

But parse.o has not changed (I can verify this by running gdb on cm3cg), and:

rodney at allegheny:~/proj/m3/cm3-new/cm3/m3-sys/m3cc/gcc-4.7/gcc/m3cg$ ll
total 792
-rw-r--r-- 1 rodney rodney   1276 2011-05-19 10:58 config-lang.in
-rw-r--r-- 1 rodney rodney   1357 2006-09-01 18:16 lang.opt
-rw-r--r-- 1 rodney rodney   1524 2003-01-05 17:19 lang-options.h
-rw-r--r-- 1 rodney rodney   1002 2006-09-01 18:16 lang-specs.h
-rw-r--r-- 1 rodney rodney  12875 2013-02-08 09:49 m3cg.h
-rw-r--r-- 1 rodney rodney  11847 2010-11-15 04:09 m3-def.h
-rw-r--r-- 1 rodney rodney   2273 2011-05-19 10:58 m3gty43.h
-rw-r--r-- 1 rodney rodney    756 2013-02-08 09:49 m3-parse.h
-rw-r--r-- 1 rodney rodney   3497 2013-05-09 11:46 Make-lang.in
-rw-r--r-- 1 rodney rodney 182831 2013-07-01 17:14 parse.c
-rw-r--r-- 1 rodney rodney 182831 2013-05-09 13:10 parse.c.~1~
-rw-r--r-- 1 rodney rodney 182831 2013-07-01 17:11 parse.c.~2~
-rw-r--r-- 1 rodney rodney 182831 2013-07-01 17:14 parse.c.temp

My edits to parse.c have been undone!  If I recreate the edited parse.c,
then chmod 444 parse.c and recompile, it has no effect. parse.c still
gets changed back to the unedited version.

Moreover, my directory m3-sys/m3cc/gcc-4.7/gcc/m3cg has no CVS subdirectory
(I have no idea how long this has been the case), and I have not been able
to get cvs to admit to having any awareness of this directory or anything in it,
using cvs log, cvs update or cvs checkout.  I even tried manually creating a
CVS subdirectory, but without getting cvs to tell me something about its current
version number of parse.c, I can't create a line in CVS/Entries for it, and cvs
continues to claim total ignorance of this file.

What is going on here?  Is parse.c (and all of m3cg) being automatically created?
 From where?

cvs update -P does not remove m3cg, BTW.