1 files changed, 26 insertions, 0 deletions

diff --git a/cmake/modules/FindIncludeWhatYouUse.cmake b/cmake/modules/FindIncludeWhatYouUse.cmake
new file mode 100644
index 0000000..b22225a
--- /dev/null
+++ b/cmake/modules/FindIncludeWhatYouUse.cmake
@@ -0,0 +1,26 @@
+#.rst:
+# FindIncludeWhatYouUse
+# ---------------------
+# Finds include-what-you-use and sets it up to run along with the compiler for C and CXX.
+
+find_program(IWYU_EXECUTABLE NAMES include-what-you-use iwyu)
+
+if(IWYU_EXECUTABLE)
+  execute_process(COMMAND "${IWYU_EXECUTABLE}" --version
+                  OUTPUT_VARIABLE IWYU_VERSION
+                  OUTPUT_STRIP_TRAILING_WHITESPACE)
+  string(REGEX MATCH "[^\n]*include-what-you-use [^\n]*" IWYU_VERSION "${IWYU_VERSION}")
+  string(REGEX REPLACE "include-what-you-use ([^ \n\r\t]+).*" "\\1" IWYU_VERSION "${IWYU_VERSION}")
+endif()
+
+include(FindPackageHandleStandardArgs)
+find_package_handle_standard_args(IncludeWhatYouUse REQUIRED_VARS IWYU_EXECUTABLE
+                                  VERSION_VAR IWYU_VERSION)
+
+if(INCLUDEWHATYOUUSE_FOUND)
+  # Supports Unix Makefiles and Ninja
+  set(CMAKE_C_INCLUDE_WHAT_YOU_USE "${IWYU_EXECUTABLE}" PARENT_SCOPE)
+  set(CMAKE_CXX_INCLUDE_WHAT_YOU_USE "${IWYU_EXECUTABLE}" PARENT_SCOPE)
+endif()
+
+mark_as_advanced(IWYU_EXECUTABLE)