(gdb-cpp-define-alist-flags): New variable.

(gdb-create-define-alist): Use. it.
(gdb-cpp-define-alist-program): Update for MS-DOS?

1 files changed, 12 insertions, 2 deletions

diff --git a/lisp/progmodes/gdb-ui.el b/lisp/progmodes/gdb-ui.el
index cf3e18c936d..56344a67e5c 100644
--- a/lisp/progmodes/gdb-ui.el
+++ b/lisp/progmodes/gdb-ui.el
@@ -196,7 +196,9 @@ detailed description of this mode.
   :group 'gud
   :version "22.1")
 
-(defcustom gdb-cpp-define-alist-program "gcc -E -dM -"
+(defcustom gdb-cpp-define-alist-program 
+  (cond ((eq system-type 'ms-dos) "gcc -E -dM -o - -")
+        (t "gcc -E -dM -"))
   "The program name for generating an alist of #define directives.
 This list is used to display the #define directive associated
 with an identifier as a tooltip. It works in a debug session with
@@ -205,9 +207,16 @@ GDB, when tooltip-gud-tips-p is t."
   :group 'gud
   :version "22.1")
 
+(defcustom gdb-cpp-define-alist-flags ""
+  "*Preprocessor flags used by `gdb-create-define-alist'."
+  :type 'string
+  :group 'gud
+  :version "22.1")
+
 (defvar gdb-define-alist nil "Alist of #define directives for GUD tooltips.")
 
 (defun gdb-create-define-alist ()
+  "Create an alist of #define directives for GUD tooltips."
   (let* ((file (buffer-file-name))
          (output
           (with-output-to-string
@@ -215,7 +224,8 @@ GDB, when tooltip-gud-tips-p is t."
               (call-process shell-file-name
                             (if (file-exists-p file) file nil)
                             (list t nil) nil "-c"
-                            gdb-cpp-define-alist-program))))
+                            (concat gdb-cpp-define-alist-program " "
+                                    gdb-cpp-define-alist-flags)))))
         (define-list (split-string output "\n" t))
         (name))
     (setq gdb-define-alist nil)