From: Lennart Borgman <lennart.borgman@gmail.com>
To: Eli Zaretskii <eliz@gnu.org>
Cc: eric@siege-engine.com, emacs-devel@gnu.org, miles@gnu.org
Subject: Re: CEDET calls cpp -E -dM -x c++ /dev/null
Date: Fri, 3 Jul 2009 13:22:44 +0200 [thread overview]
Message-ID: <e01d8a50907030422h2a6f7ebaj9f88a5fbed6d17f6@mail.gmail.com> (raw)
In-Reply-To: <83my7m2jly.fsf@gnu.org>
On Fri, Jul 3, 2009 at 11:36 AM, Eli Zaretskii<eliz@gnu.org> wrote:
>> Date: Fri, 3 Jul 2009 03:13:12 +0200
>> From: Lennart Borgman <lennart.borgman@gmail.com>
>> Cc: "Eric M. Ludlam" <eric@siege-engine.com>,
>> Emacs-Devel devel <emacs-devel@gnu.org>
>>
>> (defun semantic-gcc-get-include-paths (lang)
>> (let* ((gcc-cmd (cond
>> ((string= lang "c") "gcc")
>> (t (error "Unknown lang: %s" lang))))
>> (gcc-output (semantic-gcc-query gcc-cmd "-v" "-E" "-x" lang)))
>> ))
>>
>> However calling (semantic-gcc-get-include-paths "c") does not catch
>> the output I want to gcc-output. I get
>>
>> Result: "gcc.exe: warning: `-x c' after last input file has no effect\n
>
> This is because your forgot to append null-device to the arguments you
> pass to semantic-gcc-get-include-paths. So the command line ends with
> a "-x c", which, as GCC tells you, is quite pointless without a file
> name after it.
Thanks.
>> Yes, but what about the two different categories of include paths. How
>> should they be handled? Just use both?
>
> Yes, both.
>
> Btw, as Miles's output shows, there could be more than 2 directories
> in this list, and all of them should be looked in. AFAIR, the order
> of lookup should be the order in which GCC prints them, because that's
> what GCC does.
What about this version?
(defun semantic-gcc-query (gcc-cmd &rest gcc-option)
"Return command output.
GCC-CMD is the command to execute and GCC-OPTIONS are the options
to give to the command."
;; $ gcc -v
;;
(let ((buff (get-buffer-create " *gcc-query*")))
(save-excursion
(set-buffer buff)
(erase-buffer)
(condition-case nil
(apply 'call-process gcc-cmd nil (cons buff t) nil gcc-option)
(error ;; Some bogus directory for the first time perhaps?
(let ((default-directory (expand-file-name "~/")))
(condition-case nil
(apply 'call-process gcc-cmd nil (cons buff t) nil gcc-option)
(error ;; gcc doesn't exist???
nil)))))
(prog1
(buffer-string)
(kill-buffer buff)
))))
;;(semantic-gcc-get-include-paths "c")
;;(semantic-gcc-get-include-paths "c++")
(defun semantic-gcc-get-include-paths (lang)
(let* ((gcc-cmd (cond
((string= lang "c") "gcc")
((string= lang "c++") "c++")
(t (error "Unknown lang: %s" lang))))
(gcc-output (semantic-gcc-query gcc-cmd "-v" "-E" "-x" lang
null-device))
(lines (split-string gcc-output "\n"))
(include-marks 0)
(inc-mark "#include ")
(inc-mark-len (length "#include "))
inc-path)
(message "gcc-output=%s" gcc-output)
(dolist (line lines)
(when (> (length line) 1)
(if (= 0 include-marks)
(when (and (> (length line) inc-mark-len)
(string= inc-mark (substring line 0 inc-mark-len)))
(setq include-marks (1+ include-marks)))
(let ((chars (append line nil)))
(when (= 32 (nth 0 chars))
(when (if (memq system-type '(windows-nt))
(/= ?/ (nth 1 chars))
(= ?/ (nth 1 chars)))
(add-to-list 'inc-path
(expand-file-name (substring line 1))
t)))))))
inc-path))
next prev parent reply other threads:[~2009-07-03 11:22 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-07-01 19:06 CEDET calls cpp -E -dM -x c++ /dev/null Lennart Borgman
2009-07-01 19:20 ` Eli Zaretskii
2009-07-01 19:25 ` Lennart Borgman
2009-07-01 19:36 ` Eli Zaretskii
2009-07-01 20:01 ` Sean O'Rourke
2009-07-01 20:16 ` Lennart Borgman
2009-07-01 20:32 ` Sean O'Rourke
2009-07-01 20:25 ` Lennart Borgman
2009-07-02 3:24 ` Eli Zaretskii
2009-07-02 3:34 ` Eric M. Ludlam
2009-07-02 18:13 ` Lennart Borgman
2009-07-02 19:29 ` Eli Zaretskii
2009-07-03 0:31 ` Lennart Borgman
2009-07-03 0:46 ` Miles Bader
2009-07-03 1:13 ` Lennart Borgman
2009-07-03 9:36 ` Eli Zaretskii
2009-07-03 11:22 ` Lennart Borgman [this message]
2009-07-01 19:58 ` Lennart Borgman
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