remove use of _subv in vlrt.c
	darwin/386/signal.c
	darwin/386/*
	linux/386/* (forgotten before)

can run empty program on darwin/386 now.

R=r
DELTA=1140  (1021 added, 114 deleted, 5 changed)
OCL=26942
CL=26968

R=r
DELTA=6  (3 added, 0 deleted, 3 changed)
OCL=26944
CL=26967

R=rsc
OCL=26959
CL=26959

	package main
	func main() {
	}

and not much else.

R=ken
OCL=26943
CL=26943

into gc directory, where it gets included as ../gc/ldbody
this is similar to the assemblers including ../cc/lexbody
and ../cc/macbody.

* hook go-specific loader code into 8l.

* make current 8.out.h and 6.out.h backward compatible
with plan 9's versions.  i had added some constants in
the middle of enums and have now moved them to the end.
this keeps us from invalidating old .8 and .6 files.
not sure how much it really matters, but easy to do.

R=r
DELTA=1314  (667 added, 623 deleted, 24 changed)
OCL=26938
CL=26941

delete unused mkenam file

R=ken
OCL=26940
CL=26940

type of the field.  Use the field alignment to compute the
size of a structure.

This may help 8g but is mainly for gccgo.  gccgo maintains the
standard C/C++ ABI for structure field alignment.  For the
i386, this requires that a float64 field in a struct be
aligned on a 32-bit boundary, although for efficiency a
variable of type float64 or []float64 should be aligned on a
64-bit boundary.

I also removed the unused size field from structField.

R=r
DELTA=117  (75 added, 2 deleted, 40 changed)
OCL=26842
CL=26936

package main
var f = func(a, b int) int { return a + b }

R=ken
OCL=26935
CL=26935

and changed vlong to int64).

R=ken
OCL=26934
CL=26934

signature generation) into gc.

R=ken
OCL=26933
CL=26933

R=ken
OCL=26930
CL=26930

R=ken
OCL=26929
CL=26929

R=r
APPROVED=r
DELTA=1  (0 added, 0 deleted, 1 changed)
OCL=26926
CL=26928

	int	brcom(int);
	int	brrev(int);
	void	setmaxarg(Type*);
	Sig*	lsort(Sig*, int(*)(Sig*, Sig*));
	int	dotoffset(Node*, int*, Node**);
	void	stringpool(Node*);
	void	tempname(Node*, Type*);

R=ken
OCL=26922
CL=26922

R=ken
OCL=26916
CL=26918

- separating printing of AST and documentation
- astprinter: will subsume ast printing functionality of printer
- docprinter: will subsume doc printing functionality of printer
        also: more logic to collect all the documentation pertaining
	      to all files of a package
- parser: some cleanups, stricter syntax checks
- gds: hooks to test new doc printer (disabled)

R=r
OCL=26915
CL=26915

R=ken
OCL=26914
CL=26914

unsafe.Alignof(struct{x float}{0}.x)

R=ken
OCL=26911
CL=26913

R=ken
OCL=26909
CL=26909

R=gri
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=26908
CL=26908

instead of dereferencing nil, so no more SIGSEGVs.

R=r
DELTA=28  (0 added, 14 deleted, 14 changed)
OCL=26881
CL=26881

uses gcc to determine system header layouts and
emits simple C or Go.  see comment in main.c.

R=r
DELTA=1069  (1067 added, 0 deleted, 2 changed)
OCL=26682
CL=26880

cope better with p4 not found.

R=r
DELTA=3  (0 added, 0 deleted, 3 changed)
OCL=26877
CL=26879

R=r
DELTA=1926  (1727 added, 168 deleted, 31 changed)
OCL=26876
CL=26878

- removed left-over panic() call
- fixed a couple of bugs

R=r
OCL=26856
CL=26856

- commented public interface
- much better and very precise error messages
- much better tracing output
- many more checks (still permits more than just syntactically legal
  programs, but much more is checked that can be checked w/o semantic information)
- updated with respect to updated AST
- general cleanup throughout

Parser almost ready for move into lib/go.

R=r
OCL=26853
CL=26855

- remove ':' token from operator precedence levels

R=rsc
DELTA=25  (13 added, 8 deleted, 4 changed)
OCL=26850
CL=26854

R=r
DELTA=6  (6 added, 0 deleted, 0 changed)
OCL=26836
CL=26841

renamed PairExpr -> KeyValueExpr and PairExprList -> KeyValueList
(to match corresponding nodes in AST per rsc' suggestion)

- added a couple of TODOs

R=r,rsc
DELTA=10  (2 added, 0 deleted, 8 changed)
OCL=26837
CL=26840

R=rsc
DELTA=2  (0 added, 0 deleted, 2 changed)
OCL=26810
CL=26834

R=r
DELTA=4  (4 added, 0 deleted, 0 changed)
OCL=26797
CL=26814

- more comments on parser, various cleanups

TBR=r
OCL=26813
CL=26813

- permit scanner to run w/o error handler
- provide an error counter

R=iant
DELTA=43  (25 added, 0 deleted, 18 changed)
OCL=26804
CL=26812

R=iant
DELTA=4  (0 added, 0 deleted, 4 changed)
OCL=26802
CL=26811

R=r
DELTA=1509  (756 added, 751 deleted, 2 changed)
OCL=26799
CL=26801

R=r
DELTA=27  (25 added, 0 deleted, 2 changed)
OCL=26798
CL=26798

R=r
OCL=26794
CL=26794

- by moving Position into token, scanner dependencies
  are removed from several files
- clearer field names in token.Position, now possible to
  have a Pos() accessor w/o naming conflicts
- added Pos() accessor
- use anonymous token.Position field in AST nodes

R=r
DELTA=244  (28 added, 55 deleted, 161 changed)
OCL=26786
CL=26793

R=rsc
DELTA=22  (22 added, 0 deleted, 0 changed)
OCL=26779
CL=26792

- convert some functions into methods
- corresponding changes in pretty

R=r
DELTA=57  (3 added, 0 deleted, 54 changed)
OCL=26764
CL=26777