build: Add required CFLAGS for libpcap This patch adds some flags to required to properly link libpcap within the OpenWrt environment. Signed-off-by: Jo-Philipp Wich --- a/pppd/Makefile.linux +++ b/pppd/Makefile.linux @@ -210,8 +210,8 @@ LIBS += -ldl endif ifdef FILTER -LIBS += -lpcap -CFLAGS += -DPPP_FILTER +LIBS += -lpcap -L$(STAGING_DIR)/usr/lib +CFLAGS += -DPPP_FILTER -I$(STAGING_DIR)/usr/include endif ifdef HAVE_INET6