CMake - introduce telemetry library

Author: SiskaPavel

external/CMakeLists.txt

@@ -2,3 +2,5 @@ include(FetchContent)
 include(ExternalProject)
 
 set(FETCHCONTENT_QUIET OFF)
+
+include(telemetry.cmake)

external/telemetry.cmake

@@ -0,0 +1,26 @@
+# Telemetry library (C++ library for telemetry data collection with Fuse integration)
+#
+# The Telemetry library consists of two libraries that can be added as dependency:
+#
+# - telemetry::telemetry (C++ library for telemetry data collection)
+# - telemetry::appFs     (C++ library that expose telemetry data as a Fuse filesystem)
+
+set(TELEMETRY_BUILD_SHARED OFF)
+set(TELEMETRY_INSTALL_TARGETS OFF)
+set(TELEMETRY_PACKAGE_BUILDER OFF)
+set(TELEMETRY_ENABLE_TESTS OFF)
+
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
+set(GIT_REPO https://github.com/CESNET/telemetry.git)
+
+FetchContent_Declare(
+	telemetry
+	GIT_REPOSITORY ${GIT_REPO}
+	GIT_TAG v1.1.0
+)
+
+# Make sure that subproject accepts predefined build options without warnings.
+set(CMAKE_POLICY_DEFAULT_CMP0077 NEW)
+
+FetchContent_MakeAvailable(telemetry)