Hash :
3562e384
Author :
Date :
2017-09-16T13:03:36
Prefer https: URLs In Gnulib, Emacs, etc. we are changing ftp: and http: URLs to use https:, to discourage man-in-the-middle attacks when downloading software. The attached patch propagates these changes upstream to Automake. This patch does not affect files that Automake is downstream of, which I'll patch separately. Althouth the resources are not secret, plain HTTP is vulnerable to malicious routers that tamper with responses from GNU servers, and this sort of thing is all too common when people in some other countries browse US-based websites. See, for example: Aceto G, Botta A, Pescapé A, Awan MF, Ahmad T, Qaisar S. Analyzing internet censorship in Pakistan. RTSI 2016. https://dx.doi.org/10.1109/RTSI.2016.7740626 HTTPS is not a complete solution here, but it can be a significant help. The GNU project regularly serves up code to users, so we should take some care here.
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#!/bin/sh
# Copyright (C) 2003-2017 Free Software Foundation, Inc.
#
# 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 2, 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 <https://www.gnu.org/licenses/>.
# Check rebuild rules for AC_CONFIG_HEADERS.
# (This should also work without GNU Make.)
required=cc
. test-init.sh
cat >>configure.ac <<'EOF'
AC_PROG_CC
AC_SUBST([BOT], [bot])
AC_CONFIG_HEADERS([defs.h config.h:sub1/config.top:sub2/config.${BOT}],,
[BOT=$BOT])
AC_CONFIG_FILES([sub3/Makefile])
AC_OUTPUT
EOF
mkdir sub1 sub2 sub3
: > sub1/config.top
echo '#define NAME "grepme1"' >sub2/config.bot
cat > Makefile.am <<'END'
SUBDIRS = sub3
.PHONY: test-prog-updated
test-prog-updated:
is_newest sub3/run$(EXEEXT) sub2/config.bot
END
cat > sub3/Makefile.am <<'END'
noinst_PROGRAMS = run
END
cat >sub3/run.c <<'EOF'
#include <defs.h>
#include <config.h>
#include <stdio.h>
int main (void)
{
puts (NAME); /* from config.h */
puts (PACKAGE); /* from defs.h */
}
EOF
$ACLOCAL
$AUTOCONF
$AUTOHEADER
$AUTOMAKE
# Do not reject slow dependency extractors: we need dependency tracking.
./configure --enable-dependency-tracking
$MAKE
# Sanity check.
cross_compiling || sub3/run | grep grepme1 || exit 1
$sleep
echo '#define NAME "grepme2"' > sub2/config.bot
$MAKE
cross_compiling || sub3/run | grep grepme2 || exit 1
$MAKE test-prog-updated
$MAKE distcheck
: