Add ENABLE_CLANG_TIDY option

.clang-tidy

@@ -0,0 +1,4 @@
+---
+Checks: 'clang-analyzer-*'
+WarningsAsErrors: ''
+...

CMakeLists.txt

@@ -80,6 +80,7 @@ option(ENABLE_STEAM        "Compile with Steam library" off)
 option(ENABLE_DEVMODE      "Compile vesion for developers" off)
 option(ENABLE_UI           "Compile UI (turn off to compile CLI-only version)" on)
 option(FULLSCREEN_PLATFORM "Enable fullscreen by default" off)
+option(ENABLE_CLANG_TIDY   "Enable static analysis" off)
 set(CUSTOM_WEBSITE_URL "" CACHE STRING "Enable custom local webserver to check updates")
 
 if(ENABLE_NEWS OR ENABLE_UPDATER)
@@ -326,3 +327,42 @@ set(UNDO_TESTS     ${ENABLE_TESTS} CACHE BOOL "Enable undo tests")
 
 add_subdirectory(laf)
 add_subdirectory(src)
+
+######################################################################
+# Using clang-tidy with cmake.
+# Based on http://mariobadr.com/using-clang-tidy-with-cmake-36.html
+
+if(ENABLE_CLANG_TIDY)
+  find_program(CLANG_TIDY_EXE
+    NAMES "clang-tidy"
+    DOC "Path to clang-tidy executable")
+  if(NOT CLANG_TIDY_EXE)
+    message(STATUS "clang-tidy not found.")
+  else()
+    message(STATUS "clang-tidy found: ${CLANG_TIDY_EXE}")
+    set(DO_CLANG_TIDY "${CLANG_TIDY_EXE}")
+  endif()
+
+  if(CLANG_TIDY_EXE)
+    set_target_properties(app-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(aseprite PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(cfg-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(clip PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(dio-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(doc-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(filters-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(fixmath-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(flic-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(gen PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(laf-base PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(laf-ft PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(laf-gfx PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(laf-os PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(net-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(obs PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(render-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(ui-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(undo PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+    set_target_properties(updater-lib PROPERTIES CXX_CLANG_TIDY "${DO_CLANG_TIDY}")
+  endif()
+endif()