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json/cmake/clang_flags.cmake
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Niels LohmannandGitHub 85889e8843 docs: use HTTPS for the astyle and cppcheck links in README (#5351)
* docs: use HTTPS for the astyle and cppcheck links in README

Both links were still `http://`. `astyle.sourceforge.net` serves HTTPS
directly; `cppcheck.sourceforge.net` redirects to
`https://cppcheck.sourceforge.io`, which is also the URL already used in
`docs/mkdocs/docs/community/quality_assurance.md`, so the redirect is
skipped here.

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

* CI: suppress -Wc2y-extensions for Clang

Clang 22.1 (now shipped by silkeh/clang:latest) diagnoses __COUNTER__ as a
C2y extension, and does so in C++ mode as well. Under -Weverything -Werror
this breaks every ci_test_clang_cxx* / ci_test_clang_libcxx_cxx* target,
independently of the code under test.

The library itself does not use __COUNTER__; all diagnostics originate in
vendored Doctest (DOCTEST_ANONYMOUS, used by TEST_CASE and SECTION).

Signed-off-by: Niels Lohmann <mail@nlohmann.me>

---------

Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2026-08-04 08:43:59 +02:00

29 lines
1.5 KiB
CMake

# Ignored Clang warnings:
# -Wno-c++98-compat The library targets C++11.
# -Wno-c++98-compat-pedantic The library targets C++11.
# -Wno-deprecated-declarations The library contains annotations for deprecated functions.
# -Wno-extra-semi-stmt The library uses assert which triggers this warning.
# -Wno-padded We do not care about padding warnings.
# -Wno-covered-switch-default All switches list all cases and a default case.
# -Wno-c2y-extensions Clang 22.1 diagnoses __COUNTER__ as a C2y extension, also in
# C++ mode. The library does not use __COUNTER__; the warnings
# all come from vendored Doctest (SECTION/TEST_CASE macros).
# -Wno-unsafe-buffer-usage Pervasive: the library's own low-level numeric/buffer code
# (to_chars, serializer, lexer, binary reader/writer, input
# adapters, json_pointer) plus vendored Doctest itself (~208
# distinct sites measured 2026-07-08 on clang trunk) all use
# raw pointer arithmetic / libc string calls by necessity.
set(CLANG_CXXFLAGS
-Werror
-Weverything
-Wno-c++98-compat
-Wno-c++98-compat-pedantic
-Wno-deprecated-declarations
-Wno-extra-semi-stmt
-Wno-padded
-Wno-covered-switch-default
-Wno-c2y-extensions
-Wno-unsafe-buffer-usage
)