Improved parallel make support

Replace for loops in makefiles with proper dependencies.  Parallel
make can now span across directories.  Also, make -k and make -q work
properly.

GNU make 3.80 or newer is now required.

src/interfaces/Makefile

@@ -14,5 +14,4 @@ include $(top_builddir)/src/Makefile.global
 
 SUBDIRS = libpq ecpg
 
-all install installdirs uninstall distprep clean distclean maintainer-clean:
-	@for dir in $(SUBDIRS); do $(MAKE) -C $$dir $@ || exit; done
+$(recurse)

src/interfaces/ecpg/Makefile

@@ -2,19 +2,13 @@ subdir = src/interfaces/ecpg
 top_builddir = ../../..
 include $(top_builddir)/src/Makefile.global
 
-all install installdirs uninstall distprep:
-	$(MAKE) -C include $@
-	$(MAKE) -C pgtypeslib $@
-	$(MAKE) -C ecpglib $@
-	$(MAKE) -C compatlib $@
-	$(MAKE) -C preproc $@
+SUBDIRS = include pgtypeslib ecpglib compatlib preproc
+
+$(recurse)
+
+all-compatlib-recursive: all-ecpglib-recursive
 
 clean distclean maintainer-clean:
-	$(MAKE) -C include $@
-	$(MAKE) -C pgtypeslib $@
-	$(MAKE) -C ecpglib $@
-	$(MAKE) -C compatlib $@
-	$(MAKE) -C preproc $@
 	$(MAKE) -C test clean
 
 check checktcp installcheck: all

src/interfaces/ecpg/compatlib/Makefile

@@ -23,6 +23,7 @@ override CFLAGS += $(PTHREAD_CFLAGS)
 
 SHLIB_LINK = -L../ecpglib -lecpg -L../pgtypeslib -lpgtypes $(libpq) \
 	$(filter -lintl -lm, $(LIBS)) $(PTHREAD_LIBS)
+SHLIB_PREREQS = submake-ecpglib submake-pgtypeslib
 
 SHLIB_EXPORTS = exports.txt
 
@@ -33,6 +34,14 @@ OBJS= informix.o $(filter snprintf.o, $(LIBOBJS))
 
 all: all-lib
 
+.PHONY: submake-ecpglib submake-pgtypeslib
+
+submake-ecpglib:
+	$(MAKE) -C $(top_builddir)/src/interfaces/ecpg/ecpglib all
+
+submake-pgtypeslib:
+	$(MAKE) -C $(top_builddir)/src/interfaces/ecpg/pgtypeslib all
+
 # Shared library stuff
 include $(top_srcdir)/src/Makefile.shlib
 

src/interfaces/ecpg/ecpglib/Makefile

@@ -34,6 +34,7 @@ OBJS += thread.o
 endif
 
 SHLIB_LINK = -L../pgtypeslib -lpgtypes $(libpq) $(filter -lintl -lm, $(LIBS)) $(PTHREAD_LIBS)
+SHLIB_PREREQS = submake-libpq submake-pgtypeslib
 
 SHLIB_EXPORTS = exports.txt
 
@@ -42,12 +43,10 @@ ifeq ($(PORTNAME), win32)
 SHLIB_LINK += -lshfolder
 endif
 
-all: libpq pgtypeslib all-lib
+all: all-lib
 
-libpq:
-	$(MAKE) -C $(top_builddir)/src/interfaces/libpq all
-
-pgtypeslib:
+.PHONY: submake-pgtypeslib
+submake-pgtypeslib:
 	$(MAKE) -C $(top_builddir)/src/interfaces/ecpg/pgtypeslib all
 
 # Shared library stuff

src/interfaces/ecpg/preproc/Makefile

@@ -30,11 +30,14 @@ OBJS=	preproc.o type.o ecpg.o output.o parser.o \
 	keywords.o c_keywords.o ecpg_keywords.o kwlookup.o ../ecpglib/typename.o descriptor.o variable.o \
 	$(WIN32RES)
 
-all: submake-libpgport ecpg
+all: ecpg
 
-ecpg: $(OBJS)
+ecpg: $(OBJS) | submake-libpgport
 	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_EX) $^ $(LIBS) $(PTHREAD_LIBS) -o $@$(X)
 
+../ecpglib/typename.o: ../ecpglib/typename.c
+	$(MAKE) -C $(dir $@) $(notdir $@)
+
 # pgc is compiled as part of preproc
 preproc.o: pgc.c