This is really two changes in one but given interdependencies

and expected review latency I needed to combine the CLs.

1. Made the 5* toolpath build using the go build
   system. Hooked the subdirectories to clean.bash but added a
   separate make5.bash for now. Minor massage to make the code
   more similar to the current structure of 6c/6a/6l.

2. Change all references from long to int32 in line with
   similar change for the other toolchains.

The end result is that 5c, 5a and 5l can now be compiled and
the executables start up properly. Haven't thrown any input at
them yet.

R=rsc
APPROVED=rsc
DELTA=1052  (392 added, 328 deleted, 332 changed)
OCL=26757
CL=26761

4 files changed, 61 insertions, 39 deletions

diff --git a/src/cmd/5a/Makefile b/src/cmd/5a/Makefile
new file mode 100644
index 000000000..d9e91a03a
--- /dev/null
+++ b/src/cmd/5a/Makefile
@@ -0,0 +1,42 @@
+# Copyright 2009 The Go Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file.
+
+include ../../Make.conf
+
+TARG=\
+	5a\
+
+HFILES=\
+	a.h\
+	y.tab.h\
+	../5l/5.out.h\
+	compat.h\
+
+OFILES=\
+	y.tab.$O\
+	lex.$O\
+	compat.$O\
+#	../5l/enam.$O\
+
+YFILES=\
+	a.y\
+
+$(TARG): $(OFILES)
+	$(LD) -o $(TARG) -L$(GOROOT)/lib $(OFILES) -lbio -l9
+
+$(OFILES): $(HFILES)
+
+lex.$O:	../cc/macbody ../cc/lexbody
+
+y.tab.h: $(YFILES)
+	bison -y $(YFLAGS) $(YFILES)
+
+y.tab.c: y.tab.h
+	test -f y.tab.c && touch y.tab.c
+
+clean:
+	rm -f $(OFILES) $(TARG) *.5 enam.c 5.out a.out y.tab.h y.tab.c
+
+install: $(TARG)
+	cp $(TARG) $(BIN)/$(TARG)
diff --git a/src/cmd/5a/a.h b/src/cmd/5a/a.h
index c93b73121..939ae563e 100644
--- a/src/cmd/5a/a.h
+++ b/src/cmd/5a/a.h
@@ -30,7 +30,8 @@
 
 #include <lib9.h>
 #include <bio.h>
-#include "../5c/5.out.h"
+#include "../5l/5.out.h"
+#include "compat.h"
 
 #ifndef	EXTERN
 #define	EXTERN	extern
@@ -59,7 +60,7 @@ struct	Sym
 {
 	Sym*	link;
 	char*	macro;
-	long	value;
+	int32	value;
 	ushort	type;
 	char	*name;
 	char	sym;
@@ -91,7 +92,7 @@ EXTERN	struct
 struct	Gen
 {
 	Sym*	sym;
-	long	offset;
+	int32	offset;
 	short	type;
 	short	reg;
 	short	name;
@@ -103,8 +104,8 @@ struct	Hist
 {
 	Hist*	link;
 	char*	name;
-	long	line;
-	long	offset;
+	int32	line;
+	int32	offset;
 };
 #define	H	((Hist*)0)
 
@@ -130,25 +131,25 @@ EXTERN	char*	include[NINCLUDE];
 EXTERN	Io*	iofree;
 EXTERN	Io*	ionext;
 EXTERN	Io*	iostack;
-EXTERN	long	lineno;
+EXTERN	int32	lineno;
 EXTERN	int	nerrors;
-EXTERN	long	nhunk;
+EXTERN	int32	nhunk;
 EXTERN	int	ninclude;
 EXTERN	Gen	nullgen;
 EXTERN	char*	outfile;
 EXTERN	int	pass;
 EXTERN	char*	pathname;
-EXTERN	long	pc;
+EXTERN	int32	pc;
 EXTERN	int	peekc;
 EXTERN	int	sym;
 EXTERN	char	symb[NSYMB];
 EXTERN	int	thechar;
 EXTERN	char*	thestring;
-EXTERN	long	thunk;
+EXTERN	int32	thunk;
 EXTERN	Biobuf	obuf;
 
-void*	alloc(long);
-void*	allocn(void*, long, long);
+void*	alloc(int32);
+void*	allocn(void*, int32, int32);
 void	errorexit(void);
 void	pushio(void);
 void	newio(void);
@@ -156,7 +157,7 @@ void	newfile(char*, int);
 Sym*	slookup(char*);
 Sym*	lookup(void);
 void	syminit(Sym*);
-long	yylex(void);
+int32	yylex(void);
 int	getc(void);
 int	getnsc(void);
 void	unget(int);
@@ -182,31 +183,10 @@ void	macif(int);
 void	macend(void);
 void	outhist(void);
 void	dodefine(char*);
-void	prfile(long);
+void	prfile(int32);
 void	linehist(char*, int);
 void	gethunk(void);
 void	yyerror(char*, ...);
 int	yyparse(void);
 void	setinclude(char*);
 int	assemble(char*);
-
-/*
- *	system-dependent stuff from ../cc/compat.c
- */
-
-enum				/* keep in synch with ../cc/cc.h */
-{
-	Plan9	= 1<<0,
-	Unix	= 1<<1,
-	Windows	= 1<<2,
-};
-int	mywait(int*);
-int	mycreat(char*, int);
-int	systemtype(int);
-int	pathchar(void);
-char*	mygetwd(char*, int);
-int	myexec(char*, char*[]);
-int	mydup(int, int);
-int	myfork(void);
-int	mypipe(int*);
-void*	mysbrk(ulong);
diff --git a/src/cmd/5a/a.y b/src/cmd/5a/a.y
index b41f9b65d..a1de1ea5a 100644
--- a/src/cmd/5a/a.y
+++ b/src/cmd/5a/a.y
@@ -34,7 +34,7 @@
 %union
 {
 	Sym	*sym;
-	long	lval;
+	int32	lval;
 	double	dval;
 	char	sval[8];
 	Gen	gen;
@@ -288,7 +288,7 @@ inst:
 /*
  * MULA hi,lo,r1,r2
  */
-|	LTYPEN cond reg ',' reg ',' reg ',' spreg 
+|	LTYPEN cond reg ',' reg ',' reg ',' spreg
 	{
 		$7.type = D_REGREG;
 		$7.offset = $9;
diff --git a/src/cmd/5a/lex.c b/src/cmd/5a/lex.c
index 8ca10249e..fc17b9770 100644
--- a/src/cmd/5a/lex.c
+++ b/src/cmd/5a/lex.c
@@ -444,9 +444,9 @@ cinit(void)
 	}
 
 	pathname = allocn(pathname, 0, 100);
-	if(mygetwd(pathname, 99) == 0) {
+	if(getwd(pathname, 99) == 0) {
 		pathname = allocn(pathname, 100, 900);
-		if(mygetwd(pathname, 999) == 0)
+		if(getwd(pathname, 999) == 0)
 			strcpy(pathname, "/???");
 	}
 }
@@ -492,7 +492,7 @@ zname(char *n, int t, int s)
 void
 zaddr(Gen *a, int s)
 {
-	long l;
+	int32 l;
 	int i;
 	char *n;
 	Ieee e;