Merge pull request #2610 from ighvh/ighvh-patch-extra-ldflags

Fix linking against libraries in Makefile.modinc

Author: gmoccapy

src/Makefile.modinc.in

@@ -122,7 +122,7 @@ $(foreach mod,$(patsubst %.o,%,$(obj-m)),\
 	$(Q)ld -d -r -o $*.tmp $^
 	$(Q)objcopy -j .rtapi_export -O binary $*.tmp $*.sym
 	$(Q)(echo '{ global : '; tr -s '\0' < $*.sym | xargs -r0 printf '%s;\n' | grep .; echo 'local : * ; };') > $*.ver
-	$(Q)$(CC) -shared -Bsymbolic $(LDFLAGS) -Wl,--version-script,$*.ver -o $@ $^ -lm
+	$(Q)$(CC) -shared -Bsymbolic $(LDFLAGS) -Wl,--version-script,$*.ver -o $@ $^ -lm $(EXTRA_LDFLAGS)
 	$(Q)chmod -x $@
 endif