Eli Zaretskii wrote:
I don't like the idea that Gnulib should dictate whether Emacs uses
this MinGW feature or not. If there are good reasons for that (can
you tell what they are?),
Setting __USE_MINGW_ANSI_STDIO is part of Gnulib's usual desire to support a
GNU-like environment even on non-GNU hosts.
Formerly, defining __USE_MINGW_ANSI_STDIO to 1 was done by
AC_USE_SYSTEM_EXTENSIONS (defined in m4/extensions.m4), but as this is not
really a system extension I recently moved that definition to gl_STDIO_H
(defined in m4/stdio_h.m4). When I did this I used a simple AC_DEFINE to 1, as I
assumed this would suffice. Evidently it does not work for Emacs, so I just now
adjusted the moved version in Emacs master (and in Gnulib) to look more like the
original, as per the attached Emacs patch.
From e95f7f74203d165bbaec8f5cf29ecc7758b974f0 Mon Sep 17 00:00:00 2001
From: Paul Eggert <egg...@cs.ucla.edu>
Date: Fri, 16 Sep 2016 00:55:40 -0700
Subject: [PATCH] Update from gnulib
2016-09-16 extensions: fix typo in comment
2016-09-16 stdio: don't redefine __USE_MINGW_ANSI_STDIO
* m4/extensions.m4, m4/stdio_h.m4: Copy from gnulib.
m4/extensions.m4 | 2 +-
m4/stdio_h.m4 | 10 ++++++++--
2 files changed, 9 insertions(+), 3 deletions(-)
diff --git a/m4/extensions.m4 b/m4/extensions.m4
index 3a556b1..e114a6f 100644
@@ -1,4 +1,4 @@
-# serial 14 -*- Autoconf -*-
+# serial 15 -*- Autoconf -*-
# Enable extensions on systems that normally disable them.
# Copyright (C) 2003, 2006-2016 Free Software Foundation, Inc.
diff --git a/m4/stdio_h.m4 b/m4/stdio_h.m4
index 5149981..eaa25a0 100644
@@ -1,4 +1,4 @@
-# stdio_h.m4 serial 47
+# stdio_h.m4 serial 48
dnl Copyright (C) 2007-2016 Free Software Foundation, Inc.
dnl This file is free software; the Free Software Foundation
dnl gives unlimited permission to copy and/or distribute it,
@@ -6,7 +6,13 @@
- AC_DEFINE([__USE_MINGW_ANSI_STDIO], 1, [Use GNU style printf and scanf.])
+[/* Use GNU style printf and scanf. */
+# undef __USE_MINGW_ANSI_STDIO