Make all commands that link a program look like

$(CC) $(CFLAGS) $(LDFLAGS) <object files> <extra-libraries> $(LIBS) -o $@

This form seemed to be the most portable, readable, and logical, but in any
case it's better than having a dozen different ones in the tree.

src/makefiles/Makefile.aix

@@ -35,11 +35,11 @@ else
 	$(MKLDEXPORT) postgres . > $@
   endif
 endif
-	$(CC) -Wl,-bE:$(top_builddir)/src/backend/$@ -o postgres $(OBJS) $(LDFLAGS)
+	$(CC) -Wl,-bE:$(top_builddir)/src/backend/$@ -o postgres $(OBJS) $(LDFLAGS) $(LIBS)
 
 %$(EXPSUFF): %.o
 	$(MKLDEXPORT) $*.o > $*$(EXPSUFF)
 
 %$(DLSUFFIX): %.o %$(EXPSUFF)
 	@echo Making shared library $@ from $*.o, $*$(EXPSUFF) and postgres.imp
-	$(CC) -Wl,-H512 -Wl,-bM:SRE -Wl,-bI:$(top_builddir)/src/backend/$(POSTGRES_IMP) -Wl,-bE:$*$(EXPSUFF) -o $@ $*.o $(LDFLAGS) $(LDFLAGS_SL)
+	$(CC) -Wl,-H512 -Wl,-bM:SRE -Wl,-bI:$(top_builddir)/src/backend/$(POSTGRES_IMP) -Wl,-bE:$*$(EXPSUFF) -o $@ $*.o $(LDFLAGS) $(LIBS) $(LDFLAGS_SL)

src/makefiles/Makefile.qnx4

@@ -1,12 +1,11 @@
 MK_NO_LORDER= true
-CXXFLAGS+= -I/usr/local/lib/gcc-lib/i386-pc-qnx4/egcs-2.91.60/include/g++
 AR= ar
 AROPT = cr
 LD= $(AR)
 LDREL= $(AROPT)
 LDOUT=
 LIBS= -lunix
-LDFLAGS=   $(LIBS)
+LDFLAGS=
 
 enable_shared = no
 DLSUFFIX = .so

src/makefiles/Makefile.svr4

@@ -2,7 +2,8 @@
 # symbol names to tell them what to export/import.
 #MAKE_EXPORTS= true
 
-LDFLAGS+= -lc /usr/ucblib/libucb.a -LD-Blargedynsym
+LIBS += -lc /usr/ucblib/libucb.a
+LDFLAGS += -LD-Blargedynsym
 
 DLSUFFIX = .so
 CFLAGS_SL =