build: additional options added to clang-tidy command and clang-tidy-18 hardcoded as an executable to use

.clang-tidy

@@ -3,6 +3,7 @@ Checks: '
     -abseil-*,
     -altera-*,
     -cert-dcl37-c,
+    -cert-dcl21-cpp,
     -cert-dcl50-cpp,
     -cert-dcl51-cpp,
     -cert-dcl58-cpp,

CMakeLists.txt

@@ -48,6 +48,7 @@ if(${projectPrefix}DEV_IWYU)
 
     include(include-what-you-use)
     enable_iwyu(
+        REQUIRED
         MAPPING_FILE "${PROJECT_SOURCE_DIR}/.mp-units.imp"
         NO_FORWARD_DECLARATIONS QUOTED_INCLUDES_FIRST
         MAX_LINE_LENGTH 120
@@ -55,7 +56,7 @@ if(${projectPrefix}DEV_IWYU)
     )
 elseif(${projectPrefix}DEV_CLANG_TIDY)
     include(static_analysis)
-    enable_clang_tidy()
+    enable_clang_tidy(PROGRAM clang-tidy-18 REQUIRED)
 else()
     # set restrictive compilation warnings
     # (some gcc warnings are not recognized by IWYU which is based on clang)

cmake/static_analysis.cmake

@@ -22,14 +22,59 @@
 
 cmake_minimum_required(VERSION 3.5)
 
-macro(enable_clang_tidy)
-    find_program(clang_tidy_cmd NAMES "clang-tidy")
-    if(NOT clang_tidy_cmd)
-        message(WARNING "clang-tidy not found!")
-    else()
+#
+# enable_clang_tidy([PROGRAM]                     # clang-tidy by default
+#                   [QUIET] [REQUIRED])
+#
+function(enable_clang_tidy)
+    set(_options QUIET REQUIRED)
+    set(_one_value_args PROGRAM)
+    set(_multi_value_args)
+    cmake_parse_arguments(PARSE_ARGV 0 _enable_clang_tidy "${_options}" "${_one_value_args}" "${_multi_value_args}")
+
+    # validate and process arguments
+    if(_enable_clang_tidy_UNPARSED_ARGUMENTS)
+        message(FATAL_ERROR "Invalid arguments '${_enable_clang_tidy_UNPARSED_ARGUMENTS}'")
+    endif()
+
+    if(_enable_clang_tidy_KEYWORDS_MISSING_VALUES)
+        message(FATAL_ERROR "No value provided for '${_enable_clang_tidy_KEYWORDS_MISSING_VALUES}'")
+    endif()
+
+    if(NOT _enable_iwyu_QUIET)
+        message(STATUS "Enabling clang-tidy${log_postfix}")
+    endif()
+
+    if(${_enable_clang_tidy_REQUIRED})
+        set(_error_log_level FATAL_ERROR)
+    elseif(NOT _enable_clang_tidy_QUIET)
+        set(_error_log_level STATUS)
+    endif()
+
+    if(NOT DEFINED _enable_clang_tidy_PROGRAM)
+        set(_enable_clang_tidy_PROGRAM clang-tidy)
+    endif()
+
+    find_program(_clang_tidy_path ${_enable_clang_tidy_PROGRAM})
+    if(_clang_tidy_path)
+        if(NOT _enable_clang_tidy_QUIET)
+            message(STATUS "  Executable: ${_clang_tidy_path}")
+        endif()
         if(NOT EXISTS "${CMAKE_SOURCE_DIR}/.clang-tidy")
             message(FATAL_ERROR "'${CMAKE_SOURCE_DIR}/.clang-tidy' configuration file not found!")
         endif()
-        set(CMAKE_CXX_CLANG_TIDY "${clang_tidy_cmd}")
+        set(CMAKE_CXX_CLANG_TIDY "${clang_tidy_cmd}" PARENT_SCOPE)
+    else()
+        if(DEFINED _error_log_level)
+            message(${_error_log_level} "  '${_enable_clang_tidy_PROGRAM}' executable was not found")
+        endif()
+        if(NOT _enable_iwyu_QUIET)
+            message(STATUS "Enabling clang-tidy${log_postfix} - failed")
+        endif()
+        return()
     endif()
-endmacro()
+
+    if(NOT _enable_iwyu_QUIET)
+        message(STATUS "Enabling clang-tidy${log_postfix} - done")
+    endif()
+endfunction()