kc3-lang/automake/t/extra-portability.sh

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• 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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• t/extra-portability.sh

• #! /bin/sh
  # Copyright (C) 2011-2017 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 interactions between the 'portability' and 'extra-portability'
  # warning categories:
  #   1. '-Wextra-portability' must imply '-Wportability'.
  #   2. '-Wno-portability' must imply '-Wno-extra-portability'.
  #   3. '-Wall' must imply '-Wextra-portability'.
  
  . test-init.sh
  
  # We want (almost) complete control over automake options.
  AUTOMAKE="$am_original_AUTOMAKE --foreign -Werror"
  
  cat >>configure.ac <<END
  AC_PROG_CC
  AC_PROG_RANLIB
  AC_OUTPUT
  END
  
  $ACLOCAL
  
  #
  # First, a setup where only an extra-portability warning is present
  # (no "simple" portability-warnings are).
  #
  
  cat >Makefile.am <<END
  EXTRA_LIBRARIES = libfoo.a
  libfoo_a_SOURCES = foo.c
  END
  
  # Sanity check: extra-portability warnings causes the expected error.
  AUTOMAKE_fails -Wextra-portability
  grep 'requires.*AM_PROG_AR' stderr
  
  # Warnings in extra-portability category are not enabled by default.
  $AUTOMAKE
  
  # -Wall enables extra-portability.
  AUTOMAKE_fails -Wall
  grep 'requires.*AM_PROG_AR' stderr
  
  # Disabling portability disables extra-portability as well.
  $AUTOMAKE -Wextra-portability -Wno-portability
  $AUTOMAKE -Wall -Wno-portability
  
  #
  # Now, a setup where also a "simple" portability warning is present.
  #
  
  echo 'var = $(foo--bar)' >> Makefile.am
  
  # Enabling extra-portability enables portability as well ...
  AUTOMAKE_fails -Wextra-portability
  grep 'foo--bar' stderr
  grep 'requires.*AM_PROG_AR' stderr
  # ... even if it had been previously disabled.
  AUTOMAKE_fails -Wno-portability -Wextra-portability
  grep 'foo--bar' stderr
  grep 'requires.*AM_PROG_AR' stderr
  
  # Disabling extra-portability leaves portability intact (1).
  AUTOMAKE_fails -Wportability -Wno-extra-portability
  grep 'foo--bar' stderr
  grep 'requires.*AM_PROG_AR' stderr && exit 1
  # Disabling extra-portability leaves portability intact (2).
  AUTOMAKE_fails -Wall -Wno-extra-portability
  grep 'foo--bar' stderr
  grep 'requires.*AM_PROG_AR' stderr && exit 1
  
  # Enabling portability does not enable extra-portability.
  AUTOMAKE_fails -Wportability
  grep 'foo--bar' stderr
  grep 'requires.*AM_PROG_AR' stderr && exit 1
  
  # Disabling portability disables extra-portability.
  $AUTOMAKE -Wno-portability
  $AUTOMAKE -Wextra-portability -Wno-portability
  $AUTOMAKE -Wall -Wno-portability
  
  :
  

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