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clang: Move clang-tidy configuration from Makefile to .clang-tidy
Currently we configure clang-tidy with a very long command line spelled out in the Makefile (mostly a big list of lints to disable). Move it from here into a .clang-tidy configuration file, so that the config is accessible if clang-tidy is invoked in other ways (e.g. via clangd) as well. As a bonus this also means that we can move the bulky comments about why we're suppressing various tests inline with the relevant config lines. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson
Stefano Brivio
parent
8346216c9a
commit
b78e72da0b
93
.clang-tidy
Normal file
93
.clang-tidy
Normal file
@ -0,0 +1,93 @@
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---
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Checks:
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- "clang-diagnostic-*,clang-analyzer-*,*,-modernize-*"
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# TODO: enable once https://bugs.llvm.org/show_bug.cgi?id=41311 is fixed
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- "-clang-analyzer-valist.Uninitialized"
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# Dubious value, would kill readability
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- "-cppcoreguidelines-init-variables"
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# Dubious value over the compiler's built-in warning. Would
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# increase verbosity.
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- "-bugprone-assignment-in-if-condition"
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# Debatable whether these improve readability, right now it would look
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# like a mess
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- "-google-readability-braces-around-statements"
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- "-hicpp-braces-around-statements"
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- "-readability-braces-around-statements"
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# TODO: in most cases they are justified, but probably not everywhere
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#
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- "-readability-magic-numbers"
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- "-cppcoreguidelines-avoid-magic-numbers"
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# TODO: this is Linux-only for the moment, nice to fix eventually
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- "-llvmlibc-restrict-system-libc-headers"
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# Those are needed for syscalls, epoll_wait flags, etc.
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- "-hicpp-signed-bitwise"
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# Probably not doable to impement this without plain memcpy(), memset()
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- "-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling"
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# TODO: not really important, but nice to fix eventually
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- "-llvm-include-order"
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# Dubious value, would kill readability
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- "-readability-isolate-declaration"
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# TODO: nice to fix eventually
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- "-bugprone-narrowing-conversions"
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- "-cppcoreguidelines-narrowing-conversions"
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# TODO: check, fix, and more in general constify wherever possible
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- "-cppcoreguidelines-avoid-non-const-global-variables"
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# TODO: check paths where it might make sense to improve performance
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- "-altera-unroll-loops"
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- "-altera-id-dependent-backward-branch"
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# Not much can be done about them other than being careful
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- "-bugprone-easily-swappable-parameters"
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# TODO: split reported functions
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- "-readability-function-cognitive-complexity"
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# "Poor" alignment needed for structs reflecting message formats/headers
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- "-altera-struct-pack-align"
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# TODO: check again if multithreading is implemented
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- "-concurrency-mt-unsafe"
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# Complains about any identifier <3 characters, reasonable for
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# globals, pointlessly verbose for locals and parameters.
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- "-readability-identifier-length"
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# Wants to include headers which *directly* provide the things
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# we use. That sounds nice, but means it will often want a OS
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# specific header instead of a mostly standard one, such as
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# <linux/limits.h> instead of <limits.h>.
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- "-misc-include-cleaner"
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# Want to replace all #defines of integers with enums. Kind of
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# makes sense when those defines form an enum-like set, but
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# weird for cases like standalone constants, and causes other
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# awkwardness for a bunch of cases we use
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- "-cppcoreguidelines-macro-to-enum"
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# It's been a couple of centuries since multiplication has been granted
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# precedence over addition in modern mathematical notation. Adding
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# parentheses to reinforce that certainly won't improve readability.
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- "-readability-math-missing-parentheses"
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WarningsAsErrors: "*"
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HeaderFileExtensions:
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- h
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ImplementationFileExtensions:
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- c
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HeaderFilterRegex: ""
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FormatStyle: none
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CheckOptions:
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bugprone-suspicious-string-compare.WarnOnImplicitComparison: "false"
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SystemHeaders: false
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111
Makefile
111
Makefile
@ -181,116 +181,9 @@ docs: README.md
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done < README.md; \
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) > README.plain.md
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# Checkers currently disabled for clang-tidy:
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# - llvmlibc-restrict-system-libc-headers
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# TODO: this is Linux-only for the moment, nice to fix eventually
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#
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# - google-readability-braces-around-statements
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# - hicpp-braces-around-statements
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# - readability-braces-around-statements
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# Debatable whether that improves readability, right now it would look
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# like a mess
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#
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# - readability-magic-numbers
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# - cppcoreguidelines-avoid-magic-numbers
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# TODO: in most cases they are justified, but probably not everywhere
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#
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# - clang-analyzer-valist.Uninitialized
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# TODO: enable once https://bugs.llvm.org/show_bug.cgi?id=41311 is fixed
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#
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# - clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling
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# Probably not doable to impement this without plain memcpy(), memset()
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#
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# - cppcoreguidelines-init-variables
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# Dubious value, would kill readability
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#
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# - hicpp-signed-bitwise
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# Those are needed for syscalls, epoll_wait flags, etc.
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#
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# - llvm-include-order
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# TODO: not really important, but nice to fix eventually
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#
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# - readability-isolate-declaration
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# Dubious value, would kill readability
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#
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# - bugprone-narrowing-conversions
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# - cppcoreguidelines-narrowing-conversions
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# TODO: nice to fix eventually
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#
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# - cppcoreguidelines-avoid-non-const-global-variables
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# TODO: check, fix, and more in general constify wherever possible
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#
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# - altera-unroll-loops
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# - altera-id-dependent-backward-branch
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# TODO: check paths where it might make sense to improve performance
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#
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# - bugprone-easily-swappable-parameters
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# Not much can be done about them other than being careful
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#
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# - readability-function-cognitive-complexity
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# TODO: split reported functions
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#
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# - altera-struct-pack-align
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# "Poor" alignment needed for structs reflecting message formats/headers
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#
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# - concurrency-mt-unsafe
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# TODO: check again if multithreading is implemented
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#
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# - readability-identifier-length
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# Complains about any identifier <3 characters, reasonable for
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# globals, pointlessly verbose for locals and parameters.
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#
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# - bugprone-assignment-in-if-condition
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# Dubious value over the compiler's built-in warning. Would
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# increase verbosity.
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#
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# - misc-include-cleaner
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# Wants to include headers which *directly* provide the things
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# we use. That sounds nice, but means it will often want a OS
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# specific header instead of a mostly standard one, such as
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# <linux/limits.h> instead of <limits.h>.
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#
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# - cppcoreguidelines-macro-to-enum
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# Want to replace all #defines of integers with enums. Kind of
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# makes sense when those defines form an enum-like set, but
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# weird for cases like standalone constants, and causes other
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# awkwardness for a bunch of cases we use
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#
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# - readability-math-missing-parentheses
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# It's been a couple of centuries since multiplication has been granted
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# precedence over addition in modern mathematical notation. Adding
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# parentheses to reinforce that certainly won't improve readability.
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clang-tidy: $(PASST_SRCS) $(HEADERS)
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clang-tidy -checks=*,-modernize-*,\
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-clang-analyzer-valist.Uninitialized,\
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-cppcoreguidelines-init-variables,\
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-bugprone-assignment-in-if-condition,\
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-google-readability-braces-around-statements,\
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-hicpp-braces-around-statements,\
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-readability-braces-around-statements,\
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-readability-magic-numbers,\
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-llvmlibc-restrict-system-libc-headers,\
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-hicpp-signed-bitwise,\
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-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling,\
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-llvm-include-order,\
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-cppcoreguidelines-avoid-magic-numbers,\
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-readability-isolate-declaration,\
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-bugprone-narrowing-conversions,\
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-cppcoreguidelines-narrowing-conversions,\
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-cppcoreguidelines-avoid-non-const-global-variables,\
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-altera-unroll-loops,-altera-id-dependent-backward-branch,\
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-bugprone-easily-swappable-parameters,\
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-readability-function-cognitive-complexity,\
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-altera-struct-pack-align,\
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-concurrency-mt-unsafe,\
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-readability-identifier-length,\
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-misc-include-cleaner,\
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-cppcoreguidelines-macro-to-enum,\
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-readability-math-missing-parentheses \
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-config='{CheckOptions: [{key: bugprone-suspicious-string-compare.WarnOnImplicitComparison, value: "false"}]}' \
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--warnings-as-errors=* $(PASST_SRCS) -- $(filter-out -pie,$(FLAGS) $(CFLAGS) $(CPPFLAGS)) -DCLANG_TIDY_58992
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clang-tidy $(PASST_SRCS) -- $(filter-out -pie,$(FLAGS) $(CFLAGS) $(CPPFLAGS)) \
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-DCLANG_TIDY_58992
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SYSTEM_INCLUDES := /usr/include $(wildcard /usr/include/$(TARGET))
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ifeq ($(shell $(CC) -v 2>&1 | grep -c "gcc version"),1)
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