add basic cmake build

.gitignore

@@ -30,3 +30,6 @@
 *.exe
 *.out
 *.app
+
+# cmake build directory
+build

CMakeLists.txt

@@ -0,0 +1,21 @@
+cmake_minimum_required(VERSION 3.0)
+
+project(m17-cxx-demod)
+enable_language(CXX)
+
+#C++11 is a required language feature for this project
+set(CMAKE_CXX_STANDARD 17)
+
+if(NOT CMAKE_BUILD_TYPE)
+    set (CMAKE_BUILD_TYPE Release)
+    message(STATUS "Build type not specified: defaulting to release.")
+endif()
+
+include(FindPkgConfig)
+include(GNUInstallDirs)
+
+pkg_check_modules(CODEC2 REQUIRED codec2)
+
+add_executable(m17-demod m17-demod.cpp)
+target_link_libraries(m17-demod ${CODEC2_LIBRARIES})
+install(TARGETS m17-demod DESTINATION ${CMAKE_INSTALL_BINDIR})