* alternate makefile variable constructs
@ 2003-03-26 7:45 Thien-Thi Nguyen
2003-03-27 3:30 ` Richard Stallman
0 siblings, 1 reply; 2+ messages in thread
From: Thien-Thi Nguyen @ 2003-03-26 7:45 UTC (permalink / raw)
folks,
as alluded in previous blurbs, i'm doing a vms port of emacs 21. in
src/Makefile.in, i have had success avoiding the cpp-inserting-spaces
problem (openvms 7.3-1) by using this form of variable substitution:
#ifdef VMS
/* #define VMS_SUPPORT ${lispsource}vmsproc.elc ${lispsource}vms-patch.elc */
VMS_SUPPORT = ${lispsource}vmsproc.elc ${lispsource}vms-patch.elc
#else
/* #define VMS_SUPPORT */
VMS_SUPPORT =
#endif
that is, instead of using #define, use actual makefile variables. the
requisite change in var `lisp' is correspondingly:
- VMS_SUPPORT \
+ $(VMS_SUPPORT) \
it seems to me for variables not user-settable (such as this one), the
#define approach does not bring any added benefit. i welcome insight,
however. in any case, cpp programs that insert spaces around "." lose
for these instances:
9 lines matching "^#define.*[.]" in buffer: Makefile.in
230:#define START_FILES pre-crt0.o /usr/local/lib/gcc-crt0.o
232:#define START_FILES pre-crt0.o /lib/crt0.o
235:#define START_FILES ecrt0.o
490:#define YMF_PASS_LDFLAGS(flags) `./prefix-args -Xlinker flags`
544:#define UNEXEC unexec.o
547:#define UNEXEC_SRC unexec.c
647:#define MOUSE_SUPPORT ${lispsource}mouse.elc \
662:#define MSDOS_SUPPORT ${lispsource}ls-lisp.elc ${lispsource}disp-table.elc \
671:#define WINNT_SUPPORT ${lispsource}ls-lisp.elc ${lispsource}disp-table.elc \
(note: VMS_SUPPORT missing due to local change.) generalizing from the
limited success, i propose we convert this small set of variables and
their references from #define style to makefile style.
alternatively, under vms i can kludge some TPU to do adhoc fixups, but i
would prefer not to have to go that route. (i've already gone and done
horrible things on the front end, as you may be able to surmise from
work-in-progress make-mms-derivative.el below -- email me for an example
2mms file.)
thi
_________________________________________________
;;; make-mms-derivative.el --- framework to do horrible things for VMS support
;; Copyright (C) 2003 Free Software Foundation, Inc.
;; Author: Thien-Thi Nguyen <ttn@gnu.org>
;; Keywords: maint build vms mms makefile levitte autoconf war-is-a-lose
;; Favorite-TV-Game-Show: L'Eredità
;; This file is part of GNU Emacs.
;; GNU Emacs 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 2, or (at your option)
;; any later version.
;; GNU Emacs 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 GNU Emacs; see the file COPYING. If not, write to the
;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
;; Boston, MA 02111-1307, USA.
;;; Commentary:
;; Under OpenVMS the standard make-like program is called MMS, which
;; looks for an input file in the default directory named DESCRIP.MMS
;; and runs the DCL command rules therein. As of 2003, the build
;; process requires a hand translation of the Makefile.in and related
;; Emacs-specific methodology to DCL and TPU commands, so to alleviate
;; this pain, we provide `make-mms-derivative', which given a source
;; FILENAME (under `make-mms-derivative-root-dir'), inserts the file
;; contents in a new buffer and loads FILENAME.2mms. The elisp in the
;; .2mms file can (do whatever -- it's emacs -- and) arrange to write
;; out the modified buffer after FILENAME.2mms loading by using:
;;
;; (make-mms-derivative-data 'write-under-root RELATIVE-FILENAME)
;;
;; where RELATIVE-FILENAME is something like "src/descrip.mms_in_in".
;; Over the long run, the convenience procedures provided (see source)
;; will be augmented by factoring maximally the .2mms files, squeezing
;; as much algorithm out of those nasty heuristics as possible. What
;; makes them nasty is not that they rely on the conventions of the
;; Emacs makefiles; that's no big deal. What makes them nasty is that
;; they rely on the conventions of separately maintained tools (namely
;; Autoconf 1.11 under OpenVMS and the rest of GNU), and the separation
;; of conventions is how people drift apart, dragging their software
;; behind mercilessly.
;;
;; In general, codified thought w/o self-synchronization is doomed.
;; That a generation would eat its young (most discriminatingly, even)
;; is no reason GNU cannot build around such woe.
;;; Code:
(defvar make-mms-derivative-root-dir "~/build/GNU/emacs"
"Source tree root directory.")
(defvar make-mms-derivative-data nil
"Alist of data specific to `make-mms-derivative'.")
(defun make-mms-derivative-data (key &optional newval)
(if newval
(setq make-mms-derivative-data
(cons (cons key newval) make-mms-derivative-data))
(cdr (assq key make-mms-derivative-data))))
(defun make-mms-derivative-write-under-root (rel-filename)
(write-file (expand-file-name rel-filename make-mms-derivative-root-dir)))
(defmacro make-mms-derivative-progn (msg &rest body)
`(progn
(message "(%s) %s" (point) ,msg)
,@body))
(put 'make-mms-derivative-progn 'lisp-indent-function 1)
(defun make-mms-derivative-load-edits-file (name)
(make-mms-derivative-data 'edits-filename name)
(let ((i 0) tmp res)
(while (progn
(setq tmp
(shell-command-to-string
(format "grep '^;;;%s;;' %s | sed 's/^;;;[0-9][0-9]*;;//g'"
i name)))
(not (string= "" tmp)))
(setq res (cons (cons i tmp) res)
i (1+ i)))
(make-mms-derivative-data 'raw-data res))
(load name))
(defun make-mms-derivative-insert-raw-data (n)
(insert (cdr (assq n (make-mms-derivative-data 'raw-data)))))
(defun make-mms-derivative (file)
(interactive "fSource File: ")
(let ((root (expand-file-name make-mms-derivative-root-dir))
(file (expand-file-name file)))
(unless (string-match (concat "^" root) file)
(error "Not under root (%s)" root))
(let ((edits-filename (concat file ".2mms")))
(unless (file-exists-p edits-filename)
(error "Could not find %s" edits-filename))
(let* ((pre (+ (length root) (if (string= "/" (substring root -1)) 0 1)))
(buf (get-buffer-create (format "*mms-derivative: %s"
(substring file pre)))))
(message "Munging ...")
(switch-to-buffer buf)
(erase-buffer)
(make-variable-buffer-local 'make-mms-derivative-data)
(insert-file file)
(make-mms-derivative-load-edits-file edits-filename)
(let ((out (make-mms-derivative-data 'write-under-root)))
(when out (make-mms-derivative-write-under-root out))
(kill-buffer buf)
(unless out (message "Munging ... done")))))))
(provide 'make-mms-derivative)
;;; make-mms-derivative.el ends here
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2003-03-26 7:45 alternate makefile variable constructs Thien-Thi Nguyen
2003-03-27 3:30 ` Richard Stallman
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