Add CMakeLists file to be able to build cpp library with cmake

cpp/CMakeLists.txt

@@ -0,0 +1,32 @@
+cmake_minimum_required(VERSION 3.16)
+
+project(QrCodeGenerator)
+
+set(COMMON_QR_CODE_SOURCE
+    ${CMAKE_CURRENT_SOURCE_DIR}/qrcodegen.cpp
+    ${CMAKE_CURRENT_SOURCE_DIR}/qrcodegen.hpp
+    )
+
+add_library(QrCodeGenerator SHARED
+    ${COMMON_QR_CODE_SOURCE}
+    )
+
+set_target_properties(${PROJECT_NAME} PROPERTIES
+    PUBLIC_HEADER qrcodegen.hpp
+    SOVERSION 1.8.0
+)
+
+target_include_directories(QrCodeGenerator 
+    PUBLIC
+        $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>
+        $<INSTALL_INTERFACE:include>
+    )
+
+install(TARGETS QrCodeGenerator
+        EXPORT QrCodeGeneratorTargets)
+
+install(EXPORT QrCodeGeneratorTargets
+    NAMESPACE QrCodeGenerator::
+    FILE QrCodeGeneratorTargets.cmake
+    DESTINATION lib/cmake/QrCodeGenerator
+)