xspice, move `-lm' to the end of the linker command line

src/xspice/icm/GNUmakefile.in

@@ -89,7 +89,7 @@ cm-clean :
 #-----
 
 $(cm)/$(cm).cm : $(cm-objs)
-	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $^ -o $@
+	$(CC) $(CFLAGS) $(EXTRA_CFLAGS) $(LDFLAGS) $^ $(LIBS) -o $@
 
 # "order-only" prerequisites
 #   (info "(make) Prerequisite Types")

src/xspice/icm/makedefs.in

@@ -41,8 +41,10 @@ endif
 # Path to the cmpp utility
 CMPP = $(top_builddir)/src/xspice/cmpp/cmpp
 
+LIBS = -lm
+
 # Flags to use when linking shared library
-LDFLAGS = -shared -lm
+LDFLAGS = -shared
 ifeq ($(ISMINGW), 1)
   LDFLAGS = -shared @LDFLAGS@
 endif