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EmacsLisp

;; Verify that preprocessor symbols are defined in config.in.
;; Copyright (C) 2020-2024 Free Software Foundation, Inc.
;;
;; This file is part of GDB.
;;
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 3 of the License, or
;; (at your option) any later version.
;;
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;;
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <http://www.gnu.org/licenses/>.
;; To use:
;; cd gdbsupport
;; emacs --script check-defines.el
(require 'cl-lib)
(setq-default case-fold-search nil)
;; The currently recognized macros.
(defconst check-regexp "\\_<\\(\\(HAVE\\|PTRACE_TYPE\\|SIZEOF\\)_[a-zA-Z0-9_]+\\)\\_>")
(defvar check-seen 0)
;; Whitelist. These are things that have names like autoconf-created
;; macros, but that are managed directly in the code.
(put (intern "HAVE_USEFUL_SBRK") :check-ok t)
(put (intern "HAVE_SOCKETS") :check-ok t)
(put (intern "HAVE_F_GETFD") :check-ok t)
(put (intern "HAVE_DOS_BASED_FILE_SYSTEM") :check-ok t)
(defun check-read-config.in (file)
(save-excursion
(find-file-read-only file)
(goto-char (point-min))
(while (re-search-forward "^#undef \\(.+\\)$" nil t)
(let ((name (match-string 1)))
(put (intern name) :check-ok t)))))
(defun check-one-file (file)
(save-excursion
(find-file-read-only file)
(goto-char (point-min))
(while (re-search-forward check-regexp nil t)
(let ((name (match-string 1)))
(unless (get (intern name) :check-ok)
(save-excursion
(goto-char (match-beginning 0))
(cl-incf check-seen)
(message "%s:%d:%d: error: name %s not defined"
file
(line-number-at-pos)
(current-column)
name)))))))
(defun check-directory (dir)
(dolist (file (directory-files dir t "\\.[ch]$"))
(check-one-file file)))
(check-read-config.in "config.in")
(check-read-config.in "../gnulib/config.in")
(check-directory ".")
(check-directory "../gdb/nat")
(check-directory "../gdb/target")
(when (> check-seen 0)
(message "%d errors seen" check-seen))