Fix a few single-file (MODULES, not MODULE_big) contrib makefiles that were

supposing that they should set SHLIB_LINK rather than LDFLAGS_SL.  Since these
don't go through Makefile.shlib that was a no-op on most platforms.  Also
regularize the few platform-specific Makefiles that did pay attention to
SHLIB_LINK: it seems that the real value of that is to pull in BE_DLLLIBS,
so do that instead.  Per buildfarm failures on cygwin.

contrib/earthdistance/Makefile

-# $PostgreSQL: pgsql/contrib/earthdistance/Makefile,v 1.19 2007/11/10 23:59:50 momjian Exp $
+# $PostgreSQL: pgsql/contrib/earthdistance/Makefile,v 1.20 2010/07/05 23:15:55 tgl Exp $
 
 MODULES = earthdistance
 DATA_built = earthdistance.sql
 DATA = uninstall_earthdistance.sql
 REGRESS = earthdistance
 
-SHLIB_LINK += $(filter -lm, $(LIBS))
+LDFLAGS_SL += $(filter -lm, $(LIBS))
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config

contrib/spi/Makefile

-# $PostgreSQL: pgsql/contrib/spi/Makefile,v 1.28 2007/12/03 04:22:54 tgl Exp $
+# $PostgreSQL: pgsql/contrib/spi/Makefile,v 1.29 2010/07/05 23:15:56 tgl Exp $
 
 MODULES = autoinc insert_username moddatetime refint timetravel
 DATA_built = $(addsuffix .sql, $(MODULES))
@@ -8,6 +8,8 @@ DOCS = $(addsuffix .example, $(MODULES))
 # comment out if you want a quieter refint package for other uses
 PG_CPPFLAGS = -DREFINT_VERBOSE
 
+LDFLAGS_SL += -L$(top_builddir)/src/port -lpgport
+
 ifdef USE_PGXS
 PG_CONFIG = pg_config
 PGXS := $(shell $(PG_CONFIG) --pgxs)
@@ -18,5 +20,3 @@ top_builddir = ../..
 include $(top_builddir)/src/Makefile.global
 include $(top_srcdir)/contrib/contrib-global.mk
 endif
-
-SHLIB_LINK += -L$(top_builddir)/src/port -lpgport

contrib/tablefunc/Makefile

-# $PostgreSQL: pgsql/contrib/tablefunc/Makefile,v 1.9 2007/11/10 23:59:51 momjian Exp $
+# $PostgreSQL: pgsql/contrib/tablefunc/Makefile,v 1.10 2010/07/05 23:15:56 tgl Exp $
 
 MODULES = tablefunc
 DATA_built = tablefunc.sql
 DATA = uninstall_tablefunc.sql
 REGRESS = tablefunc
 
-SHLIB_LINK += $(filter -lm, $(LIBS))
+LDFLAGS_SL += $(filter -lm, $(LIBS))
 
 ifdef USE_PGXS
 PG_CONFIG = pg_config

src/makefiles/Makefile.aix

@@ -39,4 +39,4 @@ MKLDEXPORT=$(top_srcdir)/src/backend/port/aix/mkldexport.sh
 
 # Rule for building a shared library from a single .o file
 %$(DLSUFFIX): %.o %.exp
-	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_SL) -o $@ $*.o -Wl,-bE:$*.exp $(SHLIB_LINK)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_SL) -o $@ $*.o -Wl,-bE:$*.exp $(BE_DLLLIBS)

src/makefiles/Makefile.cygwin

-# $PostgreSQL: pgsql/src/makefiles/Makefile.cygwin,v 1.14 2010/07/05 18:54:38 tgl Exp $
+# $PostgreSQL: pgsql/src/makefiles/Makefile.cygwin,v 1.15 2010/07/05 23:15:56 tgl Exp $
 DLLTOOL= dlltool
 DLLWRAP= dllwrap
 ifdef PGXS
@@ -41,5 +41,5 @@ endif
 # Rule for building a shared library from a single .o file
 %.dll: %.o
 	$(DLLTOOL) --export-all --output-def $*.def $<
-	$(DLLWRAP) -o $@ --def $*.def $< $(SHLIB_LINK)
+	$(DLLWRAP) -o $@ --def $*.def $< $(LDFLAGS) $(LDFLAGS_SL) $(BE_DLLLIBS)
 	rm -f $*.def

src/makefiles/Makefile.darwin

@@ -10,4 +10,4 @@ endif
 
 # Rule for building a shared library from a single .o file
 %.so: %.o
-	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_SL) -bundle -o $@ $< $(BE_DLLLIBS)
+	$(CC) $(CFLAGS) $(LDFLAGS) $(LDFLAGS_SL) -bundle $(BE_DLLLIBS) -o $@ $<

src/makefiles/Makefile.win32

-# $PostgreSQL: pgsql/src/makefiles/Makefile.win32,v 1.16 2010/07/05 18:54:38 tgl Exp $
+# $PostgreSQL: pgsql/src/makefiles/Makefile.win32,v 1.17 2010/07/05 23:15:56 tgl Exp $
 
 # Use replacement include files for those missing on Win32
 override CPPFLAGS+="-I$(top_srcdir)/src/include/port/win32"
@@ -69,5 +69,5 @@ win32ver.o: win32ver.rc
 # Rule for building a shared library from a single .o file
 %.dll: %.o
 	$(DLLTOOL) --export-all --output-def $*.def $<
-	$(DLLWRAP) -o $@ --def $*.def $< $(SHLIB_LINK)
+	$(DLLWRAP) -o $@ --def $*.def $< $(LDFLAGS) $(LDFLAGS_SL) $(BE_DLLLIBS)
 	rm -f $*.def