>From 021d45a602ef63bfd14a98a6d622cc107f75e2e7 Mon Sep 17 00:00:00 2001
From: Leo Liu <sdl.web@gmail.com>
Date: Tue, 5 Feb 2013 15:05:18 +0800
Subject: [PATCH 1/2] New variable compilation-dont-display-buffer

---
 lisp/progmodes/compile.el | 34 +++++++++++++++++++++++-----------
 1 file changed, 23 insertions(+), 11 deletions(-)

diff --git a/lisp/progmodes/compile.el b/lisp/progmodes/compile.el
index f383e02b..8b5e3a81 100644
--- a/lisp/progmodes/compile.el
+++ b/lisp/progmodes/compile.el
@@ -58,6 +58,12 @@ (defcustom compilation-start-hook nil
   :group 'compilation)
 
 ;;;###autoload
+(defcustom compilation-dont-display-buffer nil
+  "Non-nil to inhibit display the compilation buffer."
+  :type 'boolean
+  :group 'compilation)
+
+;;;###autoload
 (defcustom compilation-window-height nil
   "Number of lines in a compilation window.  If nil, use Emacs default."
   :type '(choice (const :tag "Default" nil)
@@ -1616,7 +1622,8 @@ (defun compilation-start (command &optional mode name-function highlight-regexp)
       (set-buffer-modified-p nil))
     ;; Pop up the compilation buffer.
     ;; http://lists.gnu.org/archive/html/emacs-devel/2007-11/msg01638.html
-    (setq outwin (display-buffer outbuf))
+    (unless (buffer-local-value 'compilation-dont-display-buffer outbuf)
+      (setq outwin (display-buffer outbuf)))
     (with-current-buffer outbuf
       (let ((process-environment
 	     (append
@@ -1638,7 +1645,7 @@ (defun compilation-start (command &optional mode name-function highlight-regexp)
 	     (list command mode name-function highlight-regexp))
 	(set (make-local-variable 'revert-buffer-function)
 	     'compilation-revert-buffer)
-	(set-window-start outwin (point-min))
+	(and outwin (set-window-start outwin (point-min)))
 
 	;; Position point as the user will see it.
 	(let ((desired-visible-point
@@ -1647,15 +1654,16 @@ (defun compilation-start (command &optional mode name-function highlight-regexp)
 		   (point-max)
 		 ;; Normally put it at the top.
 		 (point-min))))
-	  (if (eq outwin (selected-window))
-	      (goto-char desired-visible-point)
-	    (set-window-point outwin desired-visible-point)))
+	  (when outwin
+	    (if (eq outwin (selected-window))
+		(goto-char desired-visible-point)
+	      (set-window-point outwin desired-visible-point))))
 
 	;; The setup function is called before compilation-set-window-height
 	;; so it can set the compilation-window-height buffer locally.
 	(if compilation-process-setup-function
 	    (funcall compilation-process-setup-function))
-	(compilation-set-window-height outwin)
+	(and outwin (compilation-set-window-height outwin))
 	;; Start the compilation.
 	(if (fboundp 'start-process)
 	    (let ((proc
@@ -1977,6 +1985,7 @@ (defmacro define-compilation-mode (mode name doc &rest body)
 		   compilation-scroll-output
 		   compilation-search-path
 		   compilation-skip-threshold
+		   compilation-dont-display-buffer
 		   compilation-window-height))
        ,@body)))
 
@@ -2487,14 +2496,16 @@ (defun compilation-goto-locus (msg mk end-mk)
                 ;; the error location if the two buffers are in two
                 ;; different frames.  So don't do it if it's not necessary.
                 pre-existing
-	      (display-buffer (marker-buffer msg))))
+	      (unless compilation-dont-display-buffer
+		(display-buffer (marker-buffer msg)))))
 	 (highlight-regexp (with-current-buffer (marker-buffer msg)
 			     ;; also do this while we change buffer
-			     (compilation-set-window w msg)
+			     (and w (compilation-set-window w msg))
 			     compilation-highlight-regexp)))
     ;; Ideally, the window-size should be passed to `display-buffer'
     ;; so it's only used when creating a new window.
-    (unless pre-existing (compilation-set-window-height w))
+    (unless pre-existing
+      (and w (compilation-set-window-height w)))
 
     (if from-compilation-buffer
         ;; If the compilation buffer window was selected,
@@ -2606,8 +2617,9 @@ (defun compilation-find-file (marker filename directory &rest formats)
       ;; The file doesn't exist.  Ask the user where to find it.
       (save-excursion            ;This save-excursion is probably not right.
         (let ((pop-up-windows t))
-          (compilation-set-window (display-buffer (marker-buffer marker))
-                                  marker)
+          (unless compilation-dont-display-buffer
+	    (compilation-set-window (display-buffer (marker-buffer marker))
+				    marker))
           (let* ((name (read-file-name
                         (format "Find this %s in (default %s): "
                                 compilation-error filename)
-- 
1.8.1.1