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CMake: add an option to run IWYU in verbose mode

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This helps to diagnose places where IWYU asks to include headers for
internal stdlib details.
This commit is contained in:
Ben Boeckel 2023-01-27 11:09:07 -05:00
parent 7ac338be98
commit 25f0b4f397
2 changed files with 6 additions and 1 deletions
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5
CMakeLists.txt
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@ -313,6 +313,11 @@ if(CMake_RUN_IWYU)
endif()
set(CMAKE_CXX_INCLUDE_WHAT_YOU_USE
"${IWYU_COMMAND};-Xiwyu;--mapping_file=${CMake_SOURCE_DIR}/Utilities/IWYU/mapping.imp;-w")
option(CMake_IWYU_VERBOSE "Run include-what-you-use in verbose mode" OFF)
if (CMake_IWYU_VERBOSE)
list(APPEND CMAKE_CXX_INCLUDE_WHAT_YOU_USE
-Xiwyu -v7)
endif ()
list(APPEND CMAKE_CXX_INCLUDE_WHAT_YOU_USE ${CMake_IWYU_OPTIONS})
endif()

2
Utilities/IWYU/mapping.imp
View File

@ -76,7 +76,7 @@
# __decay_and_strip is used internally in the C++11 standard library.
# IWYU does not classify it as internal and suggests to add <type_traits>.
# To ignore it, we simply map it to a file that is included anyway.
# Use '-Xiwyu -v7' to see the fully qualified names that need this.
# Use 'CMake_IWYU_VERBOSE' to see the fully qualified names that need this.
# TODO: Can this be simplified with an @-expression?
#{ symbol: [ "@std::__decay_and_strip<.*>::__type", private, "\"cmConfigure.h\"", public ] },
{ symbol: [ "std::__decay_and_strip<bool>::__type", private, "\"cmConfigure.h\"", public ] },