Handle inclusion of port modules 'correctly', viz the same way libpq

does it.  Fixes OS X, which needs path.c.  It may be that Win32 needs
some more port modules, but they are easily added.

src/interfaces/ecpg/ecpglib/Makefile

@@ -4,7 +4,7 @@
 #
 # Copyright (c) 1994, Regents of the University of California
 #
-# $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/Makefile,v 1.21 2004/05/21 03:12:03 momjian Exp $
+# $PostgreSQL: pgsql/src/interfaces/ecpg/ecpglib/Makefile,v 1.22 2004/05/21 21:56:02 tgl Exp $
 #
 #-------------------------------------------------------------------------
 
@@ -17,18 +17,13 @@ SO_MAJOR_VERSION= 4
 SO_MINOR_VERSION= 2
 
 override CPPFLAGS := -I$(top_srcdir)/src/interfaces/ecpg/include \
-	-I$(libpq_srcdir) $(CPPFLAGS)
+	-I$(libpq_srcdir) -I$(top_builddir)/src/port $(CPPFLAGS)
 override CFLAGS += $(PTHREAD_CFLAGS)
 
 OBJS= execute.o typename.o descriptor.o data.o error.o prepare.o memory.o \
-	connect.o misc.o
+	connect.o misc.o path.o
 
-# needed by dllwrap
-ifeq ($(PORTNAME), win32)
-PGPORT=-lpgport
-endif
-
-SHLIB_LINK = -L../pgtypeslib -lpgtypes $(PGPORT) $(libpq) \
+SHLIB_LINK = -L../pgtypeslib -lpgtypes $(libpq) \
 	$(filter -lintl -lssl -lcrypto -lkrb5 -lcrypt -lm, $(LIBS)) $(PTHREAD_LIBS)
 
 all: all-lib
@@ -36,6 +31,14 @@ all: all-lib
 # Shared library stuff
 include $(top_srcdir)/src/Makefile.shlib
 
+# We use some port modules verbatim, but since we need to
+# compile with appropriate options to build a shared lib, we can't
+# necessarily use the same object files as the backend uses. Instead,
+# symlink the source files in here and build our own object file.
+
+path.c: % : $(top_srcdir)/src/port/%
+	rm -f $@ && $(LN_S) $< .
+
 install: all installdirs install-lib
 
 installdirs:
@@ -44,7 +47,7 @@ installdirs:
 uninstall: uninstall-lib
 
 clean distclean maintainer-clean: clean-lib
-	rm -f $(OBJS)
+	rm -f $(OBJS) path.c
 
 depend dep:
 	$(CC) -MM $(CFLAGS) *.c >depend