Remove separate version numbering for ecpg preprocessor.

Once upon a time, it made sense for the ecpg preprocessor to have its
own version number, because it used a manually-maintained grammar that
wasn't always in sync with the core grammar.  But those days are
thankfully long gone, leaving only a maintenance nuisance behind.
Let's use the PG v10 version numbering changeover as an excuse to get
rid of the ecpg version number and just have ecpg identify itself by
PG_VERSION.  From the user's standpoint, ecpg will go from "4.12" in
the 9.6 branch to "10" in the 10 branch, so there's no failure of
monotonicity.

Discussion: <1471332659.4410.67.camel@postgresql.org>

src/interfaces/ecpg/preproc/Makefile

@@ -15,16 +15,11 @@ subdir = src/interfaces/ecpg/preproc
 top_builddir = ../../../..
 include $(top_builddir)/src/Makefile.global
 
-MAJOR_VERSION= 4
-MINOR_VERSION= 13
-PATCHLEVEL=0
-
 override CPPFLAGS := -I../include -I$(top_srcdir)/src/interfaces/ecpg/include \
-	-I. -I$(srcdir) -DMAJOR_VERSION=$(MAJOR_VERSION) \
+	-I. -I$(srcdir) -DECPG_COMPILE \
-	-DMINOR_VERSION=$(MINOR_VERSION) -DPATCHLEVEL=$(PATCHLEVEL) \
 	 $(CPPFLAGS)
 
-override CFLAGS += $(PTHREAD_CFLAGS) -DECPG_COMPILE
+override CFLAGS += $(PTHREAD_CFLAGS)
 
 OBJS=	preproc.o pgc.o type.o ecpg.o output.o parser.o \
 	keywords.o c_keywords.o ecpg_keywords.o ../ecpglib/typename.o descriptor.o variable.o \

src/interfaces/ecpg/preproc/ecpg.c

@@ -150,8 +150,7 @@ main(int argc, char *const argv[])
 		switch (c)
 		{
 			case ECPG_GETOPT_LONG_VERSION:
-				printf("ecpg (PostgreSQL %s) %d.%d.%d\n", PG_VERSION,
+				printf("ecpg %s\n", PG_VERSION);
-					   MAJOR_VERSION, MINOR_VERSION, PATCHLEVEL);
 				exit(0);
 			case ECPG_GETOPT_LONG_HELP:
 				help(progname);
@@ -264,8 +263,9 @@ main(int argc, char *const argv[])
 
 	if (verbose)
 	{
-		fprintf(stderr, _("%s, the PostgreSQL embedded C preprocessor, version %d.%d.%d\n"),
+		fprintf(stderr,
-				progname, MAJOR_VERSION, MINOR_VERSION, PATCHLEVEL);
+				_("%s, the PostgreSQL embedded C preprocessor, version %s\n"),
+				progname, PG_VERSION);
 		fprintf(stderr, _("EXEC SQL INCLUDE ... search starts here:\n"));
 		for (ip = include_paths; ip != NULL; ip = ip->next)
 			fprintf(stderr, " %s\n", ip->path);
@@ -440,7 +440,7 @@ main(int argc, char *const argv[])
 				if (regression_mode)
 					fprintf(yyout, "/* Processed by ecpg (regression mode) */\n");
 				else
-					fprintf(yyout, "/* Processed by ecpg (%d.%d.%d) */\n", MAJOR_VERSION, MINOR_VERSION, PATCHLEVEL);
+					fprintf(yyout, "/* Processed by ecpg (%s) */\n", PG_VERSION);
 
 				if (header_mode == false)
 				{

src/tools/RELEASE_CHANGES

@@ -80,13 +80,11 @@ Starting a New Development Cycle
 * Add version tag to src/tools/git_changelog
 
 * Bump minor library versions, major if appropriate (see below)
-  o Look for SO_MINOR_VERSION and MINOR_VERSION macros in
+  o Look for SO_MINOR_VERSION macros in
 	src/interfaces/ecpg/compatlib/Makefile
 	src/interfaces/ecpg/ecpglib/Makefile
 	src/interfaces/ecpg/pgtypeslib/Makefile
-	src/interfaces/ecpg/preproc/Makefile
 	src/interfaces/libpq/Makefile
-	src/tools/msvc/Mkvcbuild.pm
 
 
 Creating Back-Branch Release Notes

src/tools/msvc/Mkvcbuild.pm

@@ -269,9 +269,6 @@ sub mkvcbuild
 	$ecpg->AddIncludeDir('src/interfaces/libpq');
 	$ecpg->AddPrefixInclude('src/interfaces/ecpg/preproc');
 	$ecpg->AddFiles('src/interfaces/ecpg/preproc', 'pgc.l', 'preproc.y');
-	$ecpg->AddDefine('MAJOR_VERSION=4');
-	$ecpg->AddDefine('MINOR_VERSION=13');
-	$ecpg->AddDefine('PATCHLEVEL=0');
 	$ecpg->AddDefine('ECPG_COMPILE');
 	$ecpg->AddReference($libpgcommon, $libpgport);