[BUILD] Update cmake file for later usages

lib/CMakeLists.txt

@@ -5,9 +5,34 @@ add_library(sandbox_lib)
 target_include_directories(
   sandbox_lib
   PUBLIC $<BUILD_INTERFACE:${SANDBOX_INCLUDE_DIR}/include>
+         $<INSTALL_INTERFACE:include>
   PRIVATE ${SANDBOX_INCLUDE_DIR}/lib)
 
-target_sources(sandbox_lib PRIVATE "dummygroup/dummyclass.cc"
-                                   "dummygroup/dummygroup.cc")
+# Private sources
+set(dummygroup "dummygroup/dummyclass.cc" "dummygroup/dummygroup.cc")
+
+source_group(TREE "${CMAKE_CURRENT_SOURCE_DIR}" FILES ${dummygroup})
+
+target_sources(sandbox_lib PRIVATE ${dummygroup})
+
+# Public headers
+set(sandbox_headers
+    ${SANDBOX_INCLUDE_DIR}/include/sandbox/dummygroup/dummygroup.h
+    ${SANDBOX_INCLUDE_DIR}/include/sandbox/common.h
+    ${SANDBOX_INCLUDE_DIR}/include/sandbox/configuration.h)
 
 create_analysis_target(sandbox_lib)
+
+install(
+  TARGETS sandbox_lib
+  RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+  LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR})
+
+# Headers are treated separately so the folder hierarchy gets preserved
+install(
+  DIRECTORY ${SANDBOX_INCLUDE_DIR}/include/
+  DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
+  COMPONENT header_files
+  FILES_MATCHING
+  PATTERN "*.h")