[英]Using flycheck/flymake on kernel source tree
有沒有一種簡單/自動的方法來配置flycheck或flymake在Linux內核源代碼樹中的文件上寫入時顯示錯誤注釋? 假設我正在使用fs / proc / cmdline.c,我希望flycheck進入兩個目錄並執行“ make fs / proc / cmdline.o”,然后注釋結果。 假設ARCH和CROSS_COMPILE是在外部設置的。
我一直在想自己做這個-這是我得到的:
您需要找到內核源代碼樹的基礎,因此查找Makefile
的默認flymake
處理會適得其反。 我們將添加自己的文件,該文件可以用於查找源庫和包裝正常的內核makefile:
在內核源代碼樹的基礎上添加文件flymake.mk
(根據您自己的交叉編譯需求進行配置):
ARCH=mips
CROSS_COMPILE=mips-linux-gnu-
export ARCH
export CROSS_COMPILE
.PHONY: check-syntax
check-syntax:
make -f Makefile $(patsubst %_flymake.o,%.o,$(patsubst %.c,%.o,$(CHK_SOURCES)))
要點是刪除“ _flymake.c”,僅編譯真實文件,並針對真實文件而不是僅針對語法構建文件。 這樣可以避免我們意外創建file_flymake.o
我們需要說服flymake查找flymake.mk
並對其運行check-syntax
-將它們添加到您的.emacs中:
;; Build a custom command-line using flymake.mk
(defun flymake-get-kernel-make-cmdline (source base-dir)
(list "make"
(list "-s"
"-f"
"flymake.mk"
"-C"
base-dir
(concat "CHK_SOURCES=" source)
"SYNTAX_CHECK_MODE=1"
"check-syntax")))
;; Search for flymake.mk to locate kernel tree base
(defun flymake-kernel-make-init ()
(flymake-simple-make-init-impl 'flymake-create-temp-inplace t t "flymake.mk" 'flymake-get-kernel-make-cmdline))
;; Register against .c files under /linux/ or /kernel/
;; Since the list is parsed in order use `push`
(push '(".+/\\(linux\\|kernel\\)/.+\\.c$" flymake-kernel-make-init) flymake-allowed-file-name-masks)
限制:
source_flymake.c
(請確保您忽略flymake標記,直到它遍歷已保存的文件為止)。 我的按鍵會強制重新運行flymake。 push
)-我對flymake的了解不足,無法讓它一次性覆蓋一個緩沖區。 頭文件,臨時文件和外部模塊的限制可以通過修補內核Makefile本身來克服,目前我想避免這種情況。
與格雷格(Gregs)的flymake代碼段類似,這是我提出的flycheck代碼段:
(defun utils/flycheck-search-linux-makefile ()
"Search for linux top `Makefile' "
(labels
((find-makefile-file-r (path)
(let* ((parent (file-name-directory path))
(file (concat parent "Makefile")))
(cond
((file-exists-p file)
(progn
(with-temp-buffer
(insert-file-contents file)
(if (string-match "VERSION = [0-9]+[[:space:]]*PATCHLEVEL" (buffer-string))
(throw 'found-it parent)
(find-makefile-file-r (directory-file-name parent))
))))
((equal path parent) (throw 'found-it nil))
(t (find-makefile-file-r (directory-file-name parent)))))))
(if (buffer-file-name)
(catch 'found-it
(find-makefile-file-r (buffer-file-name)))
(error "buffer is not visiting a file"))))
(flycheck-define-checker utils/flycheck-linux-makefile-checker
"Linux source checker"
:command
(
"make" "C=1" "-C" (eval (utils/flycheck-search-linux-makefile))
(eval (concat (file-name-sans-extension (file-relative-name buffer-file-name (utils/flycheck-search-linux-makefile))) ".o"))
)
:error-patterns
((error line-start
(message "In file included from") " " (file-name) ":" line ":"
column ":"
line-end)
(info line-start (file-name) ":" line ":" column
": note: " (message) line-end)
(warning line-start (file-name) ":" line ":" column
": warning: " (message) line-end)
(error line-start (file-name) ":" line ":" column
": " (or "fatal error" "error") ": " (message) line-end))
:error-filter
(lambda (errors)
(let ((errors (flycheck-sanitize-errors errors)))
(dolist (err errors)
(let* ((fn (flycheck-error-filename err))
(rn0 (file-relative-name fn default-directory)) ; flycheck-fix-error-filename converted to absolute, revert
(rn1 (expand-file-name rn0 (utils/flycheck-search-linux-makefile))) ; make absolute relative to "make -C dir"
(ef (file-relative-name rn1 default-directory)) ; relative to source
)
(setf (flycheck-error-filename err) ef)
)))
errors)
:modes (c-mode c++-mode)
)
(defun utils/flycheck-mode-hook ()
"Flycheck mode hook."
(make-variable-buffer-local 'flycheck-linux-makefile)
(setq flycheck-linux-makefile (utils/flycheck-search-linux-makefile))
(if flycheck-linux-makefile
(flycheck-select-checker 'utils/flycheck-linux-makefile-checker))
)
(add-hook 'flycheck-mode-hook 'utils/flycheck-mode-hook)
不完美,但可用。
我正在使用flymake.mk
makefile像
## case 2: called within docker and cross env
ifeq (${_FLYMAKE_WRAPPED},)
_c_sources := $(filter %.c,$(CHK_SOURCES))
_h_sources := $(filter %.h,$(CHK_SOURCES))
_make_wrapped = $(MAKE) \
kbuild-file=$(abspath $(firstword ${MAKEFILE_LIST})) \
_FLYMAKE_WRAPPED=$1 _FLYMAKE_TYPE=$2 M=$(dir $*) $3
check-syntax: $(addprefix .check-syntax_,${_c_sources} ${_h_sources})
$(addprefix .check-syntax_,${_c_sources} ${_h_sources}):.check-syntax_%:
+$(call _make_wrapped,2,c)
## case 3: checking the files
else ifeq (${_FLYMAKE_WRAPPED},2)
-include $(dir ${CHK_SOURCES})/Makefile
-include $(dir ${CHK_SOURCES})/Kbuild
# Reset object/module list
obj-y :=
obj-m :=
lib-y :=
lib-m :=
always :=
targets :=
subdir-y :=
subdir-m :=
__build: check-syntax
.PHONY: check-syntax
clean_checkflags = $(filter-out -M% -g% -Wp,-M%,$1)
check-syntax: ${CHK_SOURCES}
$(CC) $(call clean_checkflags,$(c_flags)) -c -o /dev/null -S $<
endif
它既可以處理頭文件,也可以使用臨時flymake文件。
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