keytable: add bpf protocols

Add a few BPF protocols and infrastructure for building them.

Signed-off-by: Sean Young <sean@mess.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/utils/keytable/bpf_protocols/Makefile.am b/utils/keytable/bpf_protocols/Makefile.am
new file mode 100644
index 00000000..5e4b3d67
--- /dev/null
+++ b/utils/keytable/bpf_protocols/Makefile.am
@@ -0,0 +1,21 @@
+# Get Clang's default includes on this system, as opposed to those seen by
+# '-target bpf'. This fixes "missing" files on some architectures/distros,
+# such as asm/byteorder.h, asm/socket.h, asm/sockios.h, sys/cdefs.h etc.
+#
+# Use '-idirafter': Don't interfere with include mechanics except where the
+# build would have failed anyways.
+CLANG_SYS_INCLUDES := $(shell $(CLANG) -v -E - </dev/null 2>&1 \
+        | sed -n '/<...> search starts here:/,/End of search list./{ s| \(/.*\)|-idirafter \1|p }')
+
+%.o: %.c
+	$(CLANG) $(CLANG_SYS_INCLUDES) -I$(top_srcdir)/include -target bpf -O2 -c $<
+
+PROTOCOLS = grundig.o pulse_distance.o pulse_length.o rc_mm.o manchester.o
+
+all: $(PROTOCOLS)
+
+# custom target
+install-data-local:
+	$(install_sh) -d "$(DESTDIR)$(keytableuserdir)/protocols"
+	$(install_sh) -d "$(DESTDIR)$(keytablesystemdir)/protocols"
+	$(install_sh) $(PROTOCOLS) "$(DESTDIR)$(keytablesystemdir)/protocols"