1 files changed, 102 insertions, 0 deletions
diff --git a/share/mk/lint/c.mk b/share/mk/lint/c.mk
new file mode 100644
index 0000000..b7d80a9
--- /dev/null
+++ b/share/mk/lint/c.mk
@@ -0,0 +1,102 @@
+########################################################################
+# Copyright 2021-2022, Alejandro Colomar <alx@kernel.org>
+# SPDX-License-Identifier: GPL-3.0-or-later
+########################################################################
+
+
+ifndef MAKEFILE_LINT_C_INCLUDED
+MAKEFILE_LINT_C_INCLUDED := 1
+
+
+include $(MAKEFILEDIR)/build/src.mk
+include $(MAKEFILEDIR)/cmd.mk
+include $(MAKEFILEDIR)/lint/_.mk
+
+
+DEFAULT_CHECKPATCHFLAGS :=
+EXTRA_CHECKPATCHFLAGS   :=
+CHECKPATCHFLAGS         := $(DEFAULT_CHECKPATCHFLAGS) $(EXTRA_CHECKPATCHFLAGS)
+CHECKPATCH              := checkpatch
+
+clang-tidy_config       := $(SYSCONFDIR)/clang-tidy/config.yaml
+DEFAULT_CLANG-TIDYFLAGS := \
+	--config-file=$(clang-tidy_config) \
+	--quiet \
+	--use-color
+EXTRA_CLANG-TIDYFLAGS   :=
+CLANG-TIDYFLAGS         := $(DEFAULT_CLANG-TIDYFLAGS) $(EXTRA_CLANG-TIDYFLAGS)
+CLANG-TIDY              := clang-tidy
+
+CPPCHECK_SUPPRESS     := $(SYSCONFDIR)/cppcheck/cppcheck.suppress
+DEFAULT_CPPCHECKFLAGS := \
+	--enable=all \
+	--error-exitcode=2 \
+	--inconclusive \
+	--quiet \
+	--suppressions-list=$(CPPCHECK_SUPPRESS)
+EXTRA_CPPCHECKFLAGS   :=
+CPPCHECKFLAGS         := $(DEFAULT_CPPCHECKFLAGS) $(EXTRA_CPPCHECKFLAGS)
+CPPCHECK              := cppcheck
+
+DEFAULT_CPPLINTFLAGS :=
+EXTRA_CPPLINTFLAGS   :=
+CPPLINTFLAGS         := $(DEFAULT_CPPLINTFLAGS) $(EXTRA_CPPLINTFLAGS)
+CPPLINT              := cpplint
+
+DEFAULT_IWYUFLAGS := \
+	-Xiwyu --no_fwd_decls \
+	-Xiwyu --error
+EXTRA_IWYUFLAGS   :=
+IWYUFLAGS         := $(DEFAULT_IWYUFLAGS) $(EXTRA_IWYUFLAGS)
+IWYU              := iwyu
+
+
+_LINT_c_checkpatch := $(patsubst %.c,%.lint-c.checkpatch.touch,$(_UNITS_src_c))
+_LINT_c_clang-tidy := $(patsubst %.c,%.lint-c.clang-tidy.touch,$(_UNITS_src_c))
+_LINT_c_cppcheck   := $(patsubst %.c,%.lint-c.cppcheck.touch,$(_UNITS_src_c))
+_LINT_c_cpplint    := $(patsubst %.c,%.lint-c.cpplint.touch,$(_UNITS_src_c))
+_LINT_c_iwyu       := $(patsubst %.c,%.lint-c.iwyu.touch,$(_UNITS_src_c))
+
+
+linters_c := checkpatch clang-tidy cppcheck cpplint iwyu
+lint_c    := $(foreach x,$(linters_c),lint-c-$(x))
+
+
+$(_LINT_c_checkpatch): %.lint-c.checkpatch.touch: %.c
+	$(info LINT (checkpatch)	$@)
+	$(CHECKPATCH) $(CHECKPATCHFLAGS) -f $<
+	touch $@
+
+$(_LINT_c_clang-tidy): %.lint-c.clang-tidy.touch: %.c
+	$(info LINT (clang-tidy)	$@)
+	$(CLANG-TIDY) $(CLANG-TIDYFLAGS) $< -- $(CPPFLAGS) $(CFLAGS) 2>&1 \
+	| $(SED) '/generated\.$$/d'
+	touch $@
+
+$(_LINT_c_cppcheck): %.lint-c.cppcheck.touch: %.c
+	$(info LINT (cppcheck)	$@)
+	$(CPPCHECK) $(CPPCHECKFLAGS) $<
+	touch $@
+
+$(_LINT_c_cpplint): %.lint-c.cpplint.touch: %.c
+	$(info LINT (cpplint)	$@)
+	$(CPPLINT) $(CPPLINTFLAGS) $< >/dev/null
+	touch $@
+
+$(_LINT_c_iwyu): %.lint-c.iwyu.touch: %.c
+	$(info LINT (iwyu)	$@)
+	$(IWYU) $(IWYUFLAGS) $(CPPFLAGS) $(CFLAGS) $< 2>&1 \
+	| $(TAC) \
+	| $(SED) '/correct/{N;d}' \
+	| $(TAC)
+	touch $@
+
+
+.PHONY: $(lint_c)
+$(lint_c): lint-c-%: $$(_LINT_c_%);
+
+.PHONY: lint-c
+lint-c: $(lint_c);
+
+
+endif  # include guard