Added a header-only library example using dummy-created library.

Author: MrPointer

examples/CMakeLists.txt

@@ -5,6 +5,7 @@ project(Examples LANGUAGES C CXX ASM)
 add_subdirectory(hello-world)
 add_subdirectory(arduino-library)
 add_subdirectory(3rd-party-library)
+add_subdirectory(header-only-library)
 add_subdirectory(blink-example)
 add_subdirectory(servo-knob-example)
 add_subdirectory(sketch)

examples/header-only-library/CMakeLists.txt

@@ -0,0 +1,13 @@
+cmake_minimum_required(VERSION 3.8.2)
+
+project(Header_Only_Lib)
+get_board_id(board_id nano atmega328)
+
+add_arduino_executable(Header_Only_Lib ${board_id} headerOnlyTest.cpp)
+
+# Find the library by 'tricking' the framework to use current directory as the Sketchbook path,
+# allowing us to use the 'find' API
+set(ARDUINO_CMAKE_SKETCHBOOK_PATH "${CMAKE_CURRENT_LIST_DIR}")
+find_arduino_library(headerTest test-lib ${board_id} 3RD_PARTY HEADER_ONLY)
+
+link_arduino_library(Header_Only_Lib headerTest ${board_id} HEADER_ONLY)

examples/header-only-library/headerOnlyTest.cpp

@@ -0,0 +1,18 @@
+#include <Arduino.h>
+#include <TestLib.hpp>
+
+void setup()
+{
+    pinMode(BAR, OUTPUT);
+}
+
+void loop()
+{
+    foo();
+    delayMicroseconds(SOME_DELAY);
+}
+
+void foo()
+{
+    digitalWrite(BAR, HIGH);
+}

examples/header-only-library/libraries/test-lib/library.properties

@@ -0,0 +1,9 @@
+name=Test Library
+version=0.1
+author=Arduino-CMake-NG
+maintainer=Arduino-CMake-NG <https://github.com/arduino-cmake/Arduino-CMake-NG>
+sentence=Arduino library to test header-only feature support in the Arduino-CMake framework
+paragraph=Arduino library to test header-only feature support in the Arduino-CMake framework
+category=Display
+url=https://github.com/arduino-cmake/Arduino-CMake-NG
+architectures=*

examples/header-only-library/libraries/test-lib/src/TestLib.hpp

@@ -0,0 +1,11 @@
+#ifndef EXAMPLES_TESTLIB_HPP
+#define EXAMPLES_TESTLIB_HPP
+
+#include <Arduino.h>
+
+#define BAR 1
+#define SOME_DELAY 200
+
+void foo();
+
+#endif //EXAMPLES_TESTLIB_HPP