24.04 always checking for include-what-you-use and cppcheck about cmake-scripts

[StableCoder]

I had a few emails from people who didn't want to use the options/flags I had used originally, and wanted to have more control via options within their own projects. Thus in 23.09, the tools.cmake items were reworked:

Rework of tools.cmake items. The options of CLANG_TIDY, IWYU and CPPCHECK have been removed. Instead, it is up to the including project on when/how to enable these tools. The ability to 'reset' the tools, to disable them for certain scopes has been accommodated via the use of reset_* macros.

Quite simply, you should be able to add options and put the macro calls of include_what_you_use and cppcheck in an if statement.

To remake the exact behaviour from before for tools.cmake, you can change something like this:

clang_tidy(...)
include_what_you_use(...)
cppcheck(...)

to

option(CLANG_TIDY "Turns on clang-tidy processing if it is found." OFF)
if(CLANG_TIDY)
  clang_tidy(...)
endif()

option(IWYU "Turns on include-what-you-use processing if it is found." OFF)
if(IWYU)
  include_what_you_use(...)
endif()

option(CPPCHECK "Turns on cppcheck processing if it is found." OFF)
if(CPPCHECK)
  cppcheck(...)
endif()