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) 2004-2017 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/>.
# Verify that intermediate files are only built from Yacc and Lex
# sources in maintainer mode.
# From Derek R. Price.
required=cc
. test-init.sh
cat >> configure.ac << 'END'
AM_MAINTAINER_MODE
AC_PROG_CC
AM_PROG_LEX
AC_PROG_YACC
AC_OUTPUT
END
cat > Makefile.am <<'END'
YACC = false
LEX = false
bin_PROGRAMS = zardoz
zardoz_SOURCES = zardoz.y joe.l
LDADD = @LEXLIB@
END
# The point of this test is that it is not dependent on a working lex
# or yacc.
cat > joe.c <<EOF
int joe (int arg)
{
return arg * 2;
}
EOF
# On systems which link in libraries non-lazily and whose linkers
# complain about unresolved symbols by default, such as Solaris, an
# yylex function needs to be defined to avoid an error due to an
# unresolved symbol.
cat > zardoz.c <<EOF
int joe (int arg);
int yylex (void)
{
return 0;
}
int main (int argc, char **argv)
{
return joe (argc);
}
EOF
# Ensure a later timestamp for our Lex & Yacc sources.
$sleep
: > joe.l
: > zardoz.y
$ACLOCAL
$AUTOCONF
$AUTOMAKE -a
./configure
$MAKE
cat >myyacc.sh <<'END'
#! /bin/sh
echo "$@" >y.tab.c
END
cat >mylex.sh <<'END'
echo "$@" >lex.yy.c
END
chmod +x myyacc.sh mylex.sh
PATH=$(pwd)$PATH_SEPARATOR$PATH; export PATH
# "make maintainer-clean; ./configure; make" should always work,
# per GNU Standard.
$MAKE maintainer-clean
./configure
run_make YACC=myyacc.sh LEX=mylex.sh LEX_OUTPUT_ROOT=lex.yy zardoz.c joe.c
$FGREP zardoz.y zardoz.c
$FGREP joe.l joe.c
: