Merge pull request #5884

7de6671 Add the iwyu target to get information on unused headers (omartijn)

CMakeLists.txt

@@ -27,6 +27,9 @@
 # THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 #
 # Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
+
+set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
+
 list(INSERT CMAKE_MODULE_PATH 0
   "${CMAKE_SOURCE_DIR}/cmake")
 include(CheckCCompilerFlag)
@@ -999,3 +1002,13 @@ option(INSTALL_VENDORED_LIBUNBOUND "Install libunbound binary built from source
 
 
 CHECK_C_COMPILER_FLAG(-std=c11 HAVE_C11)
+
+find_package(PythonInterp)
+find_program(iwyu_tool_path NAMES iwyu_tool.py iwyu_tool)
+if (iwyu_tool_path AND PYTHONINTERP_FOUND)
+  add_custom_target(iwyu
+    COMMAND "${PYTHON_EXECUTABLE}" "${iwyu_tool_path}" -p "${CMAKE_BINARY_DIR}" -- --no_fwd_decls
+    COMMENT "Running include-what-you-use tool"
+    VERBATIM
+  )
+endif()