Move exclusively to bison as parser generator.

.gitignore

@@ -1,6 +1,4 @@
 a.out
 maketab
 proctab.c
-ytab.c
-ytab.h
 *.o

ChangeLog

@@ -1,3 +1,15 @@
+2020-07-30         Arnold D. Robbins     <arnold@skeeve.com>
+
+	By fiat, we use bison for $(YACC). Trying to accommodate
+	different versions didn't work.
+
+	* makefile: Significant cleanup. Replace all ytab* references
+	with awkgram.tab.* and simplify definition of YACC.
+	* .gitignore: Remove ytab* references.
+	* b.c, lex.c, maketab.c, parse.c, run.c: Replace include of ytab.h
+	with awkgram.tab.h.
+	* lib.c, main.c, tran.c: Remove include of ytab.h, wasn't needed.
+
 2020-01-20         Arnold D. Robbins     <arnold@skeeve.com>
 
 	* run.c (openfile): Set the close-on-exec flag for file

b.c

@@ -32,7 +32,7 @@ THIS SOFTWARE.
 #include <string.h>
 #include <stdlib.h>
 #include "awk.h"
-#include "ytab.h"
+#include "awkgram.tab.h"
 
 #define MAXLIN 22
 

lex.c

@@ -27,7 +27,7 @@ THIS SOFTWARE.
 #include <string.h>
 #include <ctype.h>
 #include "awk.h"
-#include "ytab.h"
+#include "awkgram.tab.h"
 
 extern YYSTYPE	yylval;
 extern bool	infunc;

lib.c

@@ -31,7 +31,6 @@ THIS SOFTWARE.
 #include <stdarg.h>
 #include <limits.h>
 #include "awk.h"
-#include "ytab.h"
 
 char	EMPTY[] = { '\0' };
 FILE	*infile	= NULL;

main.c

@@ -32,7 +32,6 @@ const char	*version = "version 20200702";
 #include <string.h>
 #include <signal.h>
 #include "awk.h"
-#include "ytab.h"
 
 extern	char	**environ;
 extern	int	nfields;

makefile

@@ -34,54 +34,43 @@ CFLAGS = -O2
 HOSTCC = gcc -g -Wall -pedantic -Wcast-qual
 CC = $(HOSTCC)  # change this is cross-compiling.
 
-# yacc options.  pick one; this varies a lot by system.
-#YFLAGS = -d -S
+# By fiat, to make our lives easier, yacc is now defined to be bison.
+# If you want something else, you're on your own.
 YACC = bison -d
-#YACC = yacc -d
-#		-S uses sprintf in yacc parser instead of sprint
 
 OFILES = b.o main.o parse.o proctab.o tran.o lib.o run.o lex.o
 
-SOURCE = awk.h ytab.c ytab.h proto.h awkgram.y lex.c b.c main.c \
+SOURCE = awk.h awkgram.tab.c awkgram.tab.h proto.h awkgram.y lex.c b.c main.c \
 	maketab.c parse.c lib.c run.c tran.c proctab.c
 
 LISTING = awk.h proto.h awkgram.y lex.c b.c main.c maketab.c parse.c \
 	lib.c run.c tran.c
 
-SHIP = README LICENSE FIXES $(SOURCE) ytab[ch].bak makefile  \
+SHIP = README LICENSE FIXES $(SOURCE) awkgram.tab.[ch].bak makefile  \
 	 awk.1
 
-a.out:	ytab.o $(OFILES)
-	$(CC) $(CFLAGS) ytab.o $(OFILES) $(ALLOC)  -lm
+a.out:	awkgram.tab.o $(OFILES)
+	$(CC) $(CFLAGS) awkgram.tab.o $(OFILES) $(ALLOC)  -lm
 
-$(OFILES):	awk.h ytab.h proto.h
+$(OFILES):	awk.h awkgram.tab.h proto.h
 
-# Clear dependency for parallel build: (make -j)
-# Depending if we used yacc or bison we can be generating different names
-# ({awkgram,y}.tab.{c,h}) so try to move both. We could be using -p to
-# specify the output prefix, but older yacc's don't support it.
-ytab.c ytab.h:	awk.h proto.h awkgram.y
+awkgram.tab.c awkgram.tab.h:	awk.h proto.h awkgram.y
 	$(YACC) $(YFLAGS) awkgram.y
-	-@for i in c h; do for j in awkgram y; do \
-	     if [ -f "$$j.tab.$$i" ]; then mv $$j.tab.$$i ytab.$$i; fi; \
-	  done; done
-
-ytab.h:	ytab.c
 
 proctab.c:	maketab
-	./maketab ytab.h >proctab.c
+	./maketab awkgram.tab.h >proctab.c
 
-maketab:	ytab.h maketab.c
+maketab:	awkgram.tab.h maketab.c
 	$(HOSTCC) $(CFLAGS) maketab.c -o maketab
 
 bundle:
-	@cp ytab.h ytabh.bak
-	@cp ytab.c ytabc.bak
+	@cp awkgram.tab.h awkgram.tab.h.bak
+	@cp awkgram.tab.c awkgram.tab.c.bak
 	@bundle $(SHIP)
 
 tar:
-	@cp ytab.h ytabh.bak
-	@cp ytab.c ytabc.bak
+	@cp awkgram.tab.h awkgram.tab.h.bak
+	@cp awkgram.tab.c awkgram.tab.c.bak
 	@bundle $(SHIP) >awk.shar
 	@tar cf awk.tar $(SHIP)
 	gzip awk.tar
@@ -110,7 +99,7 @@ clean: testclean
 	rm -f a.out *.o *.obj maketab maketab.exe *.bb *.bbg *.da *.gcov *.gcno *.gcda # proctab.c
 
 cleaner: testclean
-	rm -f a.out *.o *.obj maketab maketab.exe *.bb *.bbg *.da *.gcov *.gcno *.gcda proctab.c ytab*
+	rm -f a.out *.o *.obj maketab maketab.exe *.bb *.bbg *.da *.gcov *.gcno *.gcda proctab.c awkgram.tab.*
 
 # This is a bit of a band-aid until we can invest some more time
 # in the test suite.
@@ -119,4 +108,4 @@ testclean:
 		glop glop1 glop2 lilly.diff tempbig tempsmall time
 
 # For the habits of GNU maintainers:
-distclean: clean
+distclean: cleaner

maketab.c

@@ -25,14 +25,14 @@ THIS SOFTWARE.
 /*
  * this program makes the table to link function names
  * and type indices that is used by execute() in run.c.
- * it finds the indices in ytab.h, produced by yacc.
+ * it finds the indices in awkgram.tab.h, produced by bison.
  */
 
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include "awk.h"
-#include "ytab.h"
+#include "awkgram.tab.h"
 
 struct xx
 {	int token;
@@ -122,7 +122,7 @@ int main(int argc, char *argv[])
 
 	printf("#include <stdio.h>\n");
 	printf("#include \"awk.h\"\n");
-	printf("#include \"ytab.h\"\n\n");
+	printf("#include \"awkgram.tab.h\"\n\n");
 
 	if (argc != 2) {
 		fprintf(stderr, "usage: maketab YTAB_H\n");

parse.c

@@ -27,7 +27,7 @@ THIS SOFTWARE.
 #include <string.h>
 #include <stdlib.h>
 #include "awk.h"
-#include "ytab.h"
+#include "awkgram.tab.h"
 
 Node *nodealloc(int n)
 {

run.c

@@ -38,7 +38,7 @@ THIS SOFTWARE.
 #include <sys/types.h>
 #include <sys/wait.h>
 #include "awk.h"
-#include "ytab.h"
+#include "awkgram.tab.h"
 
 static void stdinit(void);
 static void flush_all(void);

tran.c

@@ -29,7 +29,6 @@ THIS SOFTWARE.
 #include <string.h>
 #include <stdlib.h>
 #include "awk.h"
-#include "ytab.h"
 
 #define	FULLTAB	2	/* rehash when table gets this x full */
 #define	GROWTAB 4	/* grow table by this factor */