Cygwin build fixes.

Get rid of use of dlltool for linking the main postgres executable.
dlltool is obsolete and we'd prefer to stop depending on it.

Also, include $(LDAP_LIBS_FE) in $(libpq_pgport).  (It's not clear that
this is really needed, or why it's not a linker bug if it is needed.
But reports are that it's needed on current Cygwin.)

We might want to back-patch this if it works, but first let's see
what the buildfarm thinks.

Marco Atzeri

src/Makefile.global.in

@@ -415,7 +415,12 @@ else
 libpq_pgport = -L$(top_builddir)/src/common -lpgcommon -L$(top_builddir)/src/port -lpgport $(libpq)
 endif
 
-# If PGXS is not defined, build libpq and libpgport dependancies as required.
+# Cygwin seems to need ldap libraries to be mentioned here, too
+ifeq ($(PORTNAME),cygwin)
+libpq_pgport += $(LDAP_LIBS_FE)
+endif
+
+# If PGXS is not defined, build libpq and libpgport dependencies as required.
 # If the build is with PGXS, then these are supposed to be already built and
 # installed, and we just ensure that the expected files exist.
 ifndef PGXS

src/backend/Makefile

@@ -62,18 +62,16 @@ endif
 
 ifeq ($(PORTNAME), cygwin)
 
-postgres: $(OBJS) postgres.def libpostgres.a
-	$(DLLTOOL) --dllname $@$(X) --output-exp $@.exp --def postgres.def
-	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_EX) -o $@$(X) -Wl,--base-file,$@.base $@.exp $(call expand_subsys,$(OBJS)) $(LIBS)
-	$(DLLTOOL) --dllname $@$(X) --base-file $@.base --output-exp $@.exp --def postgres.def
-	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_EX) -Wl,--stack,$(WIN32_STACK_RLIMIT) -o $@$(X) $@.exp $(call expand_subsys,$(OBJS)) $(LIBS)
-	rm -f $@.exp $@.base
+postgres: $(OBJS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_EX) $(export_dynamic) -Wl,--stack,$(WIN32_STACK_RLIMIT) -Wl,--export-all-symbols -Wl,--out-implib=libpostgres.a $(call expand_subsys,$^) $(LIBS) -o $@
 
-postgres.def: $(OBJS)
-	$(DLLTOOL) --export-all --output-def $@ $(call expand_subsys,$^)
+# There is no correct way to write a rule that generates two files.
+# Rules with two targets don't have that meaning, they are merely
+# shorthand for two otherwise separate rules.  To be safe for parallel
+# make, we must chain the dependencies like this.  The semicolon is
+# important, otherwise make will choose some built-in rule.
 
-libpostgres.a: postgres.def
-	$(DLLTOOL) --dllname postgres.exe --def postgres.def --output-lib $@
+libpostgres.a: postgres ;
 
 endif # cygwin
 
@@ -295,7 +293,7 @@ clean:
 		$(top_builddir)/src/include/utils/fmgroids.h \
 		$(top_builddir)/src/include/utils/probes.h
 ifeq ($(PORTNAME), cygwin)
-	rm -f postgres.dll postgres.def libpostgres.a
+	rm -f postgres.dll libpostgres.a
 endif
 ifeq ($(PORTNAME), win32)
 	rm -f postgres.dll postgres.def libpostgres.a $(WIN32RES)