--- zzzz-none-000/linux-4.1.52/net/phonet/Makefile	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/net/phonet/Makefile	2022-03-02 11:37:14.000000000 +0000
@@ -9,3 +9,10 @@
 	af_phonet.o
 
 pn_pep-y := pep.o pep-gprs.o
+
+ifdef BCM_KF # defined(CONFIG_BCM_KF_PHONET)
+obj-$(CONFIG_LD_PHONET) += ld_phonet.o
+obj-$(CONFIG_LD_TMODEM) += ld_tmodem.o
+
+subdir-ccflags-y += -Werror
+endif # BCM_KF