build system: Initial cmake support, work in progress

components/coap/CMakeLists.txt

@@ -0,0 +1,33 @@
+set(COMPONENT_ADD_INCLUDEDIRS port/include port/include/coap libcoap/include libcoap/include/coap)
+
+set(COMPONENT_SRCS
+  libcoap/src/address.c
+  libcoap/src/async.c
+  libcoap/src/block.c
+  libcoap/src/coap_time.c
+  libcoap/src/debug.c
+  libcoap/src/encode.c
+  libcoap/src/hashkey.c
+  libcoap/src/mem.c
+  libcoap/src/net.c
+  libcoap/src/option.c
+  libcoap/src/pdu.c
+  libcoap/src/resource.c
+  libcoap/src/str.c
+  libcoap/src/subscribe.c
+  libcoap/src/uri.c
+  port/coap_io_socket.c
+  )
+
+set(COMPONENT_SUBMODULES libcoap)
+
+register_component()
+
+# Needed for coap headers in public builds, also.
+#
+# TODO: find a way to move this to a port header
+target_compile_definitions(coap PUBLIC
+	WITH_POSIX
+)
+
+