mirror of
https://git.zap.org.au/git/trader.git
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Remove files no longer generated by Gnulib
This commit is contained in:
John Zaitseff
parent
304269717c
commit
19c6c86200
270
build-aux/ar-lib
270
build-aux/ar-lib
@ -1,270 +0,0 @@
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#! /bin/sh
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# Wrapper for Microsoft lib.exe
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me=ar-lib
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scriptversion=2012-03-01.08; # UTC
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# Copyright (C) 2010-2014 Free Software Foundation, Inc.
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# Written by Peter Rosin <peda@lysator.liu.se>.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2, or (at your option)
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# any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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# As a special exception to the GNU General Public License, if you
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# distribute this file as part of a program that contains a
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# configuration script generated by Autoconf, you may include it under
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# the same distribution terms that you use for the rest of that program.
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# This file is maintained in Automake, please report
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# bugs to <bug-automake@gnu.org> or send patches to
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# <automake-patches@gnu.org>.
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# func_error message
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func_error ()
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{
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echo "$me: $1" 1>&2
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exit 1
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}
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file_conv=
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# func_file_conv build_file
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# Convert a $build file to $host form and store it in $file
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# Currently only supports Windows hosts.
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func_file_conv ()
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{
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file=$1
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case $file in
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/ | /[!/]*) # absolute file, and not a UNC file
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if test -z "$file_conv"; then
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# lazily determine how to convert abs files
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case `uname -s` in
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MINGW*)
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file_conv=mingw
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;;
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CYGWIN*)
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file_conv=cygwin
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;;
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*)
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file_conv=wine
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;;
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esac
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fi
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case $file_conv in
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mingw)
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file=`cmd //C echo "$file " | sed -e 's/"\(.*\) " *$/\1/'`
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;;
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cygwin)
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file=`cygpath -m "$file" || echo "$file"`
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;;
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wine)
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file=`winepath -w "$file" || echo "$file"`
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;;
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esac
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;;
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esac
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}
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# func_at_file at_file operation archive
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# Iterate over all members in AT_FILE performing OPERATION on ARCHIVE
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# for each of them.
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# When interpreting the content of the @FILE, do NOT use func_file_conv,
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# since the user would need to supply preconverted file names to
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# binutils ar, at least for MinGW.
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func_at_file ()
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{
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operation=$2
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archive=$3
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at_file_contents=`cat "$1"`
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eval set x "$at_file_contents"
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shift
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for member
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do
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$AR -NOLOGO $operation:"$member" "$archive" || exit $?
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done
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}
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case $1 in
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'')
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func_error "no command. Try '$0 --help' for more information."
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;;
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-h | --h*)
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cat <<EOF
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Usage: $me [--help] [--version] PROGRAM ACTION ARCHIVE [MEMBER...]
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Members may be specified in a file named with @FILE.
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EOF
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exit $?
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;;
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-v | --v*)
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echo "$me, version $scriptversion"
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exit $?
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;;
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esac
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if test $# -lt 3; then
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func_error "you must specify a program, an action and an archive"
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fi
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AR=$1
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shift
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while :
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do
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if test $# -lt 2; then
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func_error "you must specify a program, an action and an archive"
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fi
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case $1 in
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-lib | -LIB \
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| -ltcg | -LTCG \
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| -machine* | -MACHINE* \
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| -subsystem* | -SUBSYSTEM* \
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| -verbose | -VERBOSE \
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| -wx* | -WX* )
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AR="$AR $1"
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shift
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;;
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*)
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action=$1
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shift
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break
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;;
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esac
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done
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orig_archive=$1
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shift
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func_file_conv "$orig_archive"
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archive=$file
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# strip leading dash in $action
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action=${action#-}
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delete=
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extract=
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list=
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quick=
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replace=
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index=
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create=
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while test -n "$action"
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do
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case $action in
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d*) delete=yes ;;
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x*) extract=yes ;;
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t*) list=yes ;;
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q*) quick=yes ;;
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r*) replace=yes ;;
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s*) index=yes ;;
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S*) ;; # the index is always updated implicitly
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c*) create=yes ;;
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u*) ;; # TODO: don't ignore the update modifier
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v*) ;; # TODO: don't ignore the verbose modifier
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*)
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func_error "unknown action specified"
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;;
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esac
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action=${action#?}
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done
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case $delete$extract$list$quick$replace,$index in
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yes,* | ,yes)
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;;
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yesyes*)
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func_error "more than one action specified"
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;;
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*)
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func_error "no action specified"
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;;
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esac
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if test -n "$delete"; then
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if test ! -f "$orig_archive"; then
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func_error "archive not found"
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fi
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for member
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do
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case $1 in
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@*)
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func_at_file "${1#@}" -REMOVE "$archive"
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;;
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*)
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func_file_conv "$1"
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$AR -NOLOGO -REMOVE:"$file" "$archive" || exit $?
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;;
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esac
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done
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elif test -n "$extract"; then
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if test ! -f "$orig_archive"; then
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func_error "archive not found"
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fi
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if test $# -gt 0; then
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for member
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do
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case $1 in
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@*)
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func_at_file "${1#@}" -EXTRACT "$archive"
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;;
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*)
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func_file_conv "$1"
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$AR -NOLOGO -EXTRACT:"$file" "$archive" || exit $?
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;;
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esac
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done
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else
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$AR -NOLOGO -LIST "$archive" | sed -e 's/\\/\\\\/g' | while read member
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do
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$AR -NOLOGO -EXTRACT:"$member" "$archive" || exit $?
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done
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fi
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elif test -n "$quick$replace"; then
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if test ! -f "$orig_archive"; then
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if test -z "$create"; then
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echo "$me: creating $orig_archive"
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fi
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orig_archive=
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else
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orig_archive=$archive
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fi
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for member
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do
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case $1 in
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@*)
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func_file_conv "${1#@}"
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set x "$@" "@$file"
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;;
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*)
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func_file_conv "$1"
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set x "$@" "$file"
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;;
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esac
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shift
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shift
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done
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if test -n "$orig_archive"; then
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$AR -NOLOGO -OUT:"$archive" "$orig_archive" "$@" || exit $?
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else
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$AR -NOLOGO -OUT:"$archive" "$@" || exit $?
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fi
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elif test -n "$list"; then
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if test ! -f "$orig_archive"; then
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func_error "archive not found"
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fi
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$AR -NOLOGO -LIST "$archive" || exit $?
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fi
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@ -1,10 +0,0 @@
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#if !defined _Noreturn && __STDC_VERSION__ < 201112
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# if (3 <= __GNUC__ || (__GNUC__ == 2 && 8 <= __GNUC_MINOR__) \
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|| 0x5110 <= __SUNPRO_C)
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# define _Noreturn __attribute__ ((__noreturn__))
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# elif 1200 <= _MSC_VER
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# define _Noreturn __declspec (noreturn)
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# else
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# define _Noreturn
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# endif
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#endif
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@ -1,26 +0,0 @@
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/* A C macro for declaring that specific arguments must not be NULL.
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Copyright (C) 2009-2016 Free Software Foundation, Inc.
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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 3 of the License, 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.
|
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You should have received a copy of the GNU General Public License
|
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
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that the values passed as arguments n, ..., m must be non-NULL pointers.
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n = 1 stands for the first argument, n = 2 for the second argument etc. */
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#ifndef _GL_ARG_NONNULL
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# if (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || __GNUC__ > 3
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# define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
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# else
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# define _GL_ARG_NONNULL(params)
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# endif
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#endif
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@ -1,271 +0,0 @@
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/* C++ compatible function declaration macros.
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Copyright (C) 2010-2016 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published
|
||||
by the Free Software Foundation; either version 3 of the License, or
|
||||
(at your option) any later version.
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||||
|
||||
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.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef _GL_CXXDEFS_H
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#define _GL_CXXDEFS_H
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/* The three most frequent use cases of these macros are:
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* For providing a substitute for a function that is missing on some
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platforms, but is declared and works fine on the platforms on which
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it exists:
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#if @GNULIB_FOO@
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# if !@HAVE_FOO@
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_GL_FUNCDECL_SYS (foo, ...);
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# endif
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_GL_CXXALIAS_SYS (foo, ...);
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_GL_CXXALIASWARN (foo);
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#elif defined GNULIB_POSIXCHECK
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...
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#endif
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|
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* For providing a replacement for a function that exists on all platforms,
|
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but is broken/insufficient and needs to be replaced on some platforms:
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|
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#if @GNULIB_FOO@
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# if @REPLACE_FOO@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef foo
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# define foo rpl_foo
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# endif
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_GL_FUNCDECL_RPL (foo, ...);
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_GL_CXXALIAS_RPL (foo, ...);
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# else
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_GL_CXXALIAS_SYS (foo, ...);
|
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# endif
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_GL_CXXALIASWARN (foo);
|
||||
#elif defined GNULIB_POSIXCHECK
|
||||
...
|
||||
#endif
|
||||
|
||||
* For providing a replacement for a function that exists on some platforms
|
||||
but is broken/insufficient and needs to be replaced on some of them and
|
||||
is additionally either missing or undeclared on some other platforms:
|
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|
||||
#if @GNULIB_FOO@
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# if @REPLACE_FOO@
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# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
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# undef foo
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# define foo rpl_foo
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# endif
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_GL_FUNCDECL_RPL (foo, ...);
|
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_GL_CXXALIAS_RPL (foo, ...);
|
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# else
|
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# if !@HAVE_FOO@ or if !@HAVE_DECL_FOO@
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_GL_FUNCDECL_SYS (foo, ...);
|
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# endif
|
||||
_GL_CXXALIAS_SYS (foo, ...);
|
||||
# endif
|
||||
_GL_CXXALIASWARN (foo);
|
||||
#elif defined GNULIB_POSIXCHECK
|
||||
...
|
||||
#endif
|
||||
*/
|
||||
|
||||
/* _GL_EXTERN_C declaration;
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||||
performs the declaration with C linkage. */
|
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#if defined __cplusplus
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# define _GL_EXTERN_C extern "C"
|
||||
#else
|
||||
# define _GL_EXTERN_C extern
|
||||
#endif
|
||||
|
||||
/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
|
||||
declares a replacement function, named rpl_func, with the given prototype,
|
||||
consisting of return type, parameters, and attributes.
|
||||
Example:
|
||||
_GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
|
||||
_GL_ARG_NONNULL ((1)));
|
||||
*/
|
||||
#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
|
||||
_GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
|
||||
#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
|
||||
_GL_EXTERN_C rettype rpl_func parameters_and_attributes
|
||||
|
||||
/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
|
||||
declares the system function, named func, with the given prototype,
|
||||
consisting of return type, parameters, and attributes.
|
||||
Example:
|
||||
_GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
|
||||
_GL_ARG_NONNULL ((1)));
|
||||
*/
|
||||
#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
|
||||
_GL_EXTERN_C rettype func parameters_and_attributes
|
||||
|
||||
/* _GL_CXXALIAS_RPL (func, rettype, parameters);
|
||||
declares a C++ alias called GNULIB_NAMESPACE::func
|
||||
that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
|
||||
Example:
|
||||
_GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
|
||||
*/
|
||||
#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
|
||||
_GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
|
||||
namespace GNULIB_NAMESPACE \
|
||||
{ \
|
||||
rettype (*const func) parameters = ::rpl_func; \
|
||||
} \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#else
|
||||
# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
|
||||
is like _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
|
||||
except that the C function rpl_func may have a slightly different
|
||||
declaration. A cast is used to silence the "invalid conversion" error
|
||||
that would otherwise occur. */
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
|
||||
namespace GNULIB_NAMESPACE \
|
||||
{ \
|
||||
rettype (*const func) parameters = \
|
||||
reinterpret_cast<rettype(*)parameters>(::rpl_func); \
|
||||
} \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#else
|
||||
# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
/* _GL_CXXALIAS_SYS (func, rettype, parameters);
|
||||
declares a C++ alias called GNULIB_NAMESPACE::func
|
||||
that redirects to the system provided function func, if GNULIB_NAMESPACE
|
||||
is defined.
|
||||
Example:
|
||||
_GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
|
||||
*/
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
/* If we were to write
|
||||
rettype (*const func) parameters = ::func;
|
||||
like above in _GL_CXXALIAS_RPL_1, the compiler could optimize calls
|
||||
better (remove an indirection through a 'static' pointer variable),
|
||||
but then the _GL_CXXALIASWARN macro below would cause a warning not only
|
||||
for uses of ::func but also for uses of GNULIB_NAMESPACE::func. */
|
||||
# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
|
||||
namespace GNULIB_NAMESPACE \
|
||||
{ \
|
||||
static rettype (*func) parameters = ::func; \
|
||||
} \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#else
|
||||
# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
|
||||
is like _GL_CXXALIAS_SYS (func, rettype, parameters);
|
||||
except that the C function func may have a slightly different declaration.
|
||||
A cast is used to silence the "invalid conversion" error that would
|
||||
otherwise occur. */
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
|
||||
namespace GNULIB_NAMESPACE \
|
||||
{ \
|
||||
static rettype (*func) parameters = \
|
||||
reinterpret_cast<rettype(*)parameters>(::func); \
|
||||
} \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#else
|
||||
# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
|
||||
is like _GL_CXXALIAS_SYS (func, rettype, parameters);
|
||||
except that the C function is picked among a set of overloaded functions,
|
||||
namely the one with rettype2 and parameters2. Two consecutive casts
|
||||
are used to silence the "cannot find a match" and "invalid conversion"
|
||||
errors that would otherwise occur. */
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
/* The outer cast must be a reinterpret_cast.
|
||||
The inner cast: When the function is defined as a set of overloaded
|
||||
functions, it works as a static_cast<>, choosing the designated variant.
|
||||
When the function is defined as a single variant, it works as a
|
||||
reinterpret_cast<>. The parenthesized cast syntax works both ways. */
|
||||
# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
|
||||
namespace GNULIB_NAMESPACE \
|
||||
{ \
|
||||
static rettype (*func) parameters = \
|
||||
reinterpret_cast<rettype(*)parameters>( \
|
||||
(rettype2(*)parameters2)(::func)); \
|
||||
} \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#else
|
||||
# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
/* _GL_CXXALIASWARN (func);
|
||||
causes a warning to be emitted when ::func is used but not when
|
||||
GNULIB_NAMESPACE::func is used. func must be defined without overloaded
|
||||
variants. */
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
# define _GL_CXXALIASWARN(func) \
|
||||
_GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
|
||||
# define _GL_CXXALIASWARN_1(func,namespace) \
|
||||
_GL_CXXALIASWARN_2 (func, namespace)
|
||||
/* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
|
||||
we enable the warning only when not optimizing. */
|
||||
# if !__OPTIMIZE__
|
||||
# define _GL_CXXALIASWARN_2(func,namespace) \
|
||||
_GL_WARN_ON_USE (func, \
|
||||
"The symbol ::" #func " refers to the system function. " \
|
||||
"Use " #namespace "::" #func " instead.")
|
||||
# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
|
||||
# define _GL_CXXALIASWARN_2(func,namespace) \
|
||||
extern __typeof__ (func) func
|
||||
# else
|
||||
# define _GL_CXXALIASWARN_2(func,namespace) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
# endif
|
||||
#else
|
||||
# define _GL_CXXALIASWARN(func) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
|
||||
causes a warning to be emitted when the given overloaded variant of ::func
|
||||
is used but not when GNULIB_NAMESPACE::func is used. */
|
||||
#if defined __cplusplus && defined GNULIB_NAMESPACE
|
||||
# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
|
||||
_GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
|
||||
GNULIB_NAMESPACE)
|
||||
# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) \
|
||||
_GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
|
||||
/* To work around GCC bug <http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
|
||||
we enable the warning only when not optimizing. */
|
||||
# if !__OPTIMIZE__
|
||||
# define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
|
||||
_GL_WARN_ON_USE_CXX (func, rettype, parameters_and_attributes, \
|
||||
"The symbol ::" #func " refers to the system function. " \
|
||||
"Use " #namespace "::" #func " instead.")
|
||||
# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
|
||||
# define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
|
||||
extern __typeof__ (func) func
|
||||
# else
|
||||
# define _GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
# endif
|
||||
#else
|
||||
# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
|
||||
_GL_EXTERN_C int _gl_cxxalias_dummy
|
||||
#endif
|
||||
|
||||
#endif /* _GL_CXXDEFS_H */
|
||||
@ -1,36 +0,0 @@
|
||||
/* A C macro for declaring that specific function parameters are not used.
|
||||
Copyright (C) 2008-2016 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 3 of the License, 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 <http://www.gnu.org/licenses/>. */
|
||||
|
||||
/* _GL_UNUSED_PARAMETER is a marker that can be appended to function parameter
|
||||
declarations for parameters that are not used. This helps to reduce
|
||||
warnings, such as from GCC -Wunused-parameter. The syntax is as follows:
|
||||
type param _GL_UNUSED_PARAMETER
|
||||
or more generally
|
||||
param_decl _GL_UNUSED_PARAMETER
|
||||
For example:
|
||||
int param _GL_UNUSED_PARAMETER
|
||||
int *(*param)(void) _GL_UNUSED_PARAMETER
|
||||
Other possible, but obscure and discouraged syntaxes:
|
||||
int _GL_UNUSED_PARAMETER *(*param)(void)
|
||||
_GL_UNUSED_PARAMETER int *(*param)(void)
|
||||
*/
|
||||
#ifndef _GL_UNUSED_PARAMETER
|
||||
# if __GNUC__ >= 3 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 7)
|
||||
# define _GL_UNUSED_PARAMETER __attribute__ ((__unused__))
|
||||
# else
|
||||
# define _GL_UNUSED_PARAMETER
|
||||
# endif
|
||||
#endif
|
||||
@ -1,109 +0,0 @@
|
||||
/* A C macro for emitting warnings if a function is used.
|
||||
Copyright (C) 2010-2016 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 3 of the License, 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 <http://www.gnu.org/licenses/>. */
|
||||
|
||||
/* _GL_WARN_ON_USE (function, "literal string") issues a declaration
|
||||
for FUNCTION which will then trigger a compiler warning containing
|
||||
the text of "literal string" anywhere that function is called, if
|
||||
supported by the compiler. If the compiler does not support this
|
||||
feature, the macro expands to an unused extern declaration.
|
||||
|
||||
This macro is useful for marking a function as a potential
|
||||
portability trap, with the intent that "literal string" include
|
||||
instructions on the replacement function that should be used
|
||||
instead. However, one of the reasons that a function is a
|
||||
portability trap is if it has the wrong signature. Declaring
|
||||
FUNCTION with a different signature in C is a compilation error, so
|
||||
this macro must use the same type as any existing declaration so
|
||||
that programs that avoid the problematic FUNCTION do not fail to
|
||||
compile merely because they included a header that poisoned the
|
||||
function. But this implies that _GL_WARN_ON_USE is only safe to
|
||||
use if FUNCTION is known to already have a declaration. Use of
|
||||
this macro implies that there must not be any other macro hiding
|
||||
the declaration of FUNCTION; but undefining FUNCTION first is part
|
||||
of the poisoning process anyway (although for symbols that are
|
||||
provided only via a macro, the result is a compilation error rather
|
||||
than a warning containing "literal string"). Also note that in
|
||||
C++, it is only safe to use if FUNCTION has no overloads.
|
||||
|
||||
For an example, it is possible to poison 'getline' by:
|
||||
- adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]],
|
||||
[getline]) in configure.ac, which potentially defines
|
||||
HAVE_RAW_DECL_GETLINE
|
||||
- adding this code to a header that wraps the system <stdio.h>:
|
||||
#undef getline
|
||||
#if HAVE_RAW_DECL_GETLINE
|
||||
_GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but"
|
||||
"not universally present; use the gnulib module getline");
|
||||
#endif
|
||||
|
||||
It is not possible to directly poison global variables. But it is
|
||||
possible to write a wrapper accessor function, and poison that
|
||||
(less common usage, like &environ, will cause a compilation error
|
||||
rather than issue the nice warning, but the end result of informing
|
||||
the developer about their portability problem is still achieved):
|
||||
#if HAVE_RAW_DECL_ENVIRON
|
||||
static char ***rpl_environ (void) { return &environ; }
|
||||
_GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared");
|
||||
# undef environ
|
||||
# define environ (*rpl_environ ())
|
||||
#endif
|
||||
*/
|
||||
#ifndef _GL_WARN_ON_USE
|
||||
|
||||
# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
|
||||
/* A compiler attribute is available in gcc versions 4.3.0 and later. */
|
||||
# define _GL_WARN_ON_USE(function, message) \
|
||||
extern __typeof__ (function) function __attribute__ ((__warning__ (message)))
|
||||
# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
|
||||
/* Verify the existence of the function. */
|
||||
# define _GL_WARN_ON_USE(function, message) \
|
||||
extern __typeof__ (function) function
|
||||
# else /* Unsupported. */
|
||||
# define _GL_WARN_ON_USE(function, message) \
|
||||
_GL_WARN_EXTERN_C int _gl_warn_on_use
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* _GL_WARN_ON_USE_CXX (function, rettype, parameters_and_attributes, "string")
|
||||
is like _GL_WARN_ON_USE (function, "string"), except that the function is
|
||||
declared with the given prototype, consisting of return type, parameters,
|
||||
and attributes.
|
||||
This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
|
||||
not work in this case. */
|
||||
#ifndef _GL_WARN_ON_USE_CXX
|
||||
# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
|
||||
# define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
|
||||
extern rettype function parameters_and_attributes \
|
||||
__attribute__ ((__warning__ (msg)))
|
||||
# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
|
||||
/* Verify the existence of the function. */
|
||||
# define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
|
||||
extern rettype function parameters_and_attributes
|
||||
# else /* Unsupported. */
|
||||
# define _GL_WARN_ON_USE_CXX(function,rettype,parameters_and_attributes,msg) \
|
||||
_GL_WARN_EXTERN_C int _gl_warn_on_use
|
||||
# endif
|
||||
#endif
|
||||
|
||||
/* _GL_WARN_EXTERN_C declaration;
|
||||
performs the declaration with C linkage. */
|
||||
#ifndef _GL_WARN_EXTERN_C
|
||||
# if defined __cplusplus
|
||||
# define _GL_WARN_EXTERN_C extern "C"
|
||||
# else
|
||||
# define _GL_WARN_EXTERN_C extern
|
||||
# endif
|
||||
#endif
|
||||
Loading…
x
Reference in New Issue
Block a user