8a: fixes for Plan 9 build

8a/a.h:
. Removed <u.h> and <libc.h> includes as they work better in "a.y".
. Made definition of EOF conditional as it's defined in the Plan 9
  header files, but not elsewhere.

8a/a.y:
. Added <u.h> and <libc.h> because <stdio.h> in Plan 9 needs them.
  Sequence <u.h>, <stdio.h>, <libc.h> recommended by RSC.

8a/lex.c:
. Added <u.h> and <libc.h> as now needed by "a.h".
. Dropped <ctype.h>.

cc/lexbody:
. exit() -> exits().
. Dropped unwanted incrementation.

cc/macbody:
. Adjusted a few format specifications.

R=rsc
CC=golang-dev
https://golang.org/cl/4644047

src/cmd/8a/a.h

@@ -28,8 +28,6 @@
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 // THE SOFTWARE.
 
-#include <u.h>
-#include <libc.h>
 #include <bio.h>
 #include "../8l/8.out.h"
 
@@ -57,7 +55,9 @@ typedef	struct	Gen2	Gen2;
 #define	NSYMB		500
 #define	BUFSIZ		8192
 #define	HISTSZ		20
+#ifndef	EOF
 #define	EOF		(-1)
+#endif
 #define	IGN		(-2)
 #define	GETC()		((--fi.c < 0)? filbuf(): *fi.p++ & 0xff)
 #define	NHASH		503

src/cmd/8a/a.y

@@ -29,7 +29,9 @@
 // THE SOFTWARE.
 
 %{
+#include <u.h>
 #include <stdio.h>	/* if we don't, bison will, and a.h re-#defines getc */
+#include <libc.h>
 #include "a.h"
 %}
 %union	{

src/cmd/8a/lex.c

@@ -29,9 +29,10 @@
 // THE SOFTWARE.
 
 #define	EXTERN
+#include <u.h>
+#include <libc.h>
 #include "a.h"
 #include "y.tab.h"
-#include <ctype.h>
 
 enum
 {

src/cmd/cc/lexbody

@@ -96,7 +96,7 @@ alloc(int32 n)
 	p = malloc(n);
 	if(p == nil) {
 		print("alloc out of mem\n");
-		exit(1);
+		exits("alloc: out of mem");
 	}
 	memset(p, 0, n);
 	return p;
@@ -110,7 +110,7 @@ allocn(void *p, int32 n, int32 d)
 	p = realloc(p, n+d);
 	if(p == nil) {
 		print("allocn out of mem\n");
-		exit(1);
+		exits("allocn: out of mem");
 	}
 	if(d > 0)
 		memset((char*)p+n, 0, d);
@@ -245,7 +245,7 @@ lookup(void)
 		}else
 			*w++ = *r;
 	}
-	*w++ = '\0';
+	*w = '\0';
 
 	h = 0;
 	for(p=symb; c = *p; p++)

src/cmd/cc/macbody

@@ -830,11 +830,11 @@ linehist(char *f, int offset)
 	if(debug['f'])
 		if(f) {
 			if(offset)
-				print("%4ld: %s (#line %d)\n", lineno, f, offset);
+				print("%4d: %s (#line %d)\n", lineno, f, offset);
 			else
-				print("%4ld: %s\n", lineno, f);
+				print("%4d: %s\n", lineno, f);
 		} else
-			print("%4ld: <pop>\n", lineno);
+			print("%4d: <pop>\n", lineno);
 	newflag = 0;
 
 	h = alloc(sizeof(Hist));