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[SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4170-g476b183


From: Arnold Robbins
Subject: [SCM] gawk branch, gawk-5.1-stable, updated. gawk-4.1.0-4170-g476b183
Date: Sun, 15 Nov 2020 23:13:33 -0500 (EST)

This is an automated email from the git hooks/post-receive script. It was
generated because a ref change was pushed to the repository containing
the project "gawk".

The branch, gawk-5.1-stable has been updated
       via  476b183d4f70a098aae0943a16ead5b59ffe6e4b (commit)
      from  54465496d75564ff37a1afac730c818fec9c7389 (commit)

Those revisions listed above that are new to this repository have
not appeared on any other notification email; so we list those
revisions in full, below.

- Log -----------------------------------------------------------------
http://git.sv.gnu.org/cgit/gawk.git/commit/?id=476b183d4f70a098aae0943a16ead5b59ffe6e4b

commit 476b183d4f70a098aae0943a16ead5b59ffe6e4b
Author: Arnold D. Robbins <arnold@skeeve.com>
Date:   Mon Nov 16 06:13:22 2020 +0200

    Update build-aux files.

diff --git a/build-aux/ChangeLog b/build-aux/ChangeLog
index 313c9f9..ed59e3d 100644
--- a/build-aux/ChangeLog
+++ b/build-aux/ChangeLog
@@ -1,3 +1,7 @@
+2020-11-16         Arnold D. Robbins     <arnold@skeeve.com>
+
+       * config.guess, config.sub, install-sh: Updated from GNULIB.
+
 2020-10-31         Arnold D. Robbins     <arnold@skeeve.com>
 
        * config.guess: Updated from GNULIB.
diff --git a/build-aux/config.guess b/build-aux/config.guess
index 12dd5b4..0fc11ed 100755
--- a/build-aux/config.guess
+++ b/build-aux/config.guess
@@ -2,7 +2,7 @@
 # Attempt to guess a canonical system name.
 #   Copyright 1992-2020 Free Software Foundation, Inc.
 
-timestamp='2020-10-22'
+timestamp='2020-11-07'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -32,7 +32,7 @@ timestamp='2020-10-22'
 # Please send patches to <config-patches@gnu.org>.
 
 
-me=`echo "$0" | sed -e 's,.*/,,'`
+me=$(echo "$0" | sed -e 's,.*/,,')
 
 usage="\
 Usage: $0 [OPTION]
@@ -103,7 +103,7 @@ set_cc_for_build() {
     test "$tmp" && return 0
     : "${TMPDIR=/tmp}"
     # shellcheck disable=SC2039
-    { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n 
"$tmp" && test -d "$tmp" ; } ||
+    { tmp=$( (umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null) && test 
-n "$tmp" && test -d "$tmp" ; } ||
        { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir 
"$tmp" 2>/dev/null) ; } ||
        { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir "$tmp" 2>/dev/null) && echo 
"Warning: creating insecure temp directory" >&2 ; } ||
        { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 
1 ; }
@@ -131,10 +131,10 @@ if test -f /.attbin/uname ; then
        PATH=$PATH:/.attbin ; export PATH
 fi
 
-UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
-UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
-UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
-UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
+UNAME_MACHINE=$( (uname -m) 2>/dev/null) || UNAME_MACHINE=unknown
+UNAME_RELEASE=$( (uname -r) 2>/dev/null) || UNAME_RELEASE=unknown
+UNAME_SYSTEM=$( (uname -s) 2>/dev/null) || UNAME_SYSTEM=unknown
+UNAME_VERSION=$( (uname -v) 2>/dev/null) || UNAME_VERSION=unknown
 
 case "$UNAME_SYSTEM" in
 Linux|GNU|GNU/*)
@@ -158,7 +158,7 @@ Linux|GNU|GNU/*)
        #endif
        #endif
        EOF
-       eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, 
,,g'`"
+       eval "$($CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 
's, ,,g')"
        ;;
 esac
 
@@ -177,10 +177,10 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        # Note: NetBSD doesn't particularly care about the vendor
        # portion of the name.  We always set it to "unknown".
        sysctl="sysctl -n hw.machine_arch"
-       UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \
+       UNAME_MACHINE_ARCH=$( (uname -p 2>/dev/null || \
            "/sbin/$sysctl" 2>/dev/null || \
            "/usr/sbin/$sysctl" 2>/dev/null || \
-           echo unknown)`
+           echo unknown))
        case "$UNAME_MACHINE_ARCH" in
            aarch64eb) machine=aarch64_be-unknown ;;
            armeb) machine=armeb-unknown ;;
@@ -189,8 +189,8 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
            sh3eb) machine=sh-unknown ;;
            sh5el) machine=sh5le-unknown ;;
            earmv*)
-               arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 
's,^e\(armv[0-9]\).*$,\1,'`
-               endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 
's,^.*\(eb\)$,\1,p'`
+               arch=$(echo "$UNAME_MACHINE_ARCH" | sed -e 
's,^e\(armv[0-9]\).*$,\1,')
+               endian=$(echo "$UNAME_MACHINE_ARCH" | sed -ne 
's,^.*\(eb\)$,\1,p')
                machine="${arch}${endian}"-unknown
                ;;
            *) machine="$UNAME_MACHINE_ARCH"-unknown ;;
@@ -221,7 +221,7 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        case "$UNAME_MACHINE_ARCH" in
            earm*)
                expr='s/^earmv[0-9]/-eabi/;s/eb$//'
-               abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"`
+               abi=$(echo "$UNAME_MACHINE_ARCH" | sed -e "$expr")
                ;;
        esac
        # The OS release
@@ -234,7 +234,7 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
                release='-gnu'
                ;;
            *)
-               release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. 
-f1,2`
+               release=$(echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. 
-f1,2)
                ;;
        esac
        # Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
@@ -243,15 +243,15 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        echo "$machine-${os}${release}${abi-}"
        exit ;;
     *:Bitrig:*:*)
-       UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
+       UNAME_MACHINE_ARCH=$(arch | sed 's/Bitrig.//')
        echo "$UNAME_MACHINE_ARCH"-unknown-bitrig"$UNAME_RELEASE"
        exit ;;
     *:OpenBSD:*:*)
-       UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
+       UNAME_MACHINE_ARCH=$(arch | sed 's/OpenBSD.//')
        echo "$UNAME_MACHINE_ARCH"-unknown-openbsd"$UNAME_RELEASE"
        exit ;;
     *:LibertyBSD:*:*)
-       UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'`
+       UNAME_MACHINE_ARCH=$(arch | sed 's/^.*BSD\.//')
        echo "$UNAME_MACHINE_ARCH"-unknown-libertybsd"$UNAME_RELEASE"
        exit ;;
     *:MidnightBSD:*:*)
@@ -287,17 +287,17 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
     alpha:OSF1:*:*)
        case $UNAME_RELEASE in
        *4.0)
-               UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
+               UNAME_RELEASE=$(/usr/sbin/sizer -v | awk '{print $3}')
                ;;
        *5.*)
-               UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $4}'`
+               UNAME_RELEASE=$(/usr/sbin/sizer -v | awk '{print $4}')
                ;;
        esac
        # According to Compaq, /usr/sbin/psrinfo has been available on
        # OSF/1 and Tru64 systems produced since 1995.  I hope that
        # covers most systems running today.  This code pipes the CPU
        # types through head -n 1, so we only detect the type of CPU 0.
-       ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) 
processor.*$/\1/p' | head -n 1`
+       ALPHA_CPU_TYPE=$(/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha 
\(.*\) processor.*$/\1/p' | head -n 1)
        case "$ALPHA_CPU_TYPE" in
            "EV4 (21064)")
                UNAME_MACHINE=alpha ;;
@@ -335,7 +335,7 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        # A Tn.n version is a released field test version.
        # A Xn.n version is an unreleased experimental baselevel.
        # 1.2 uses "1.2" for uname -r.
-       echo "$UNAME_MACHINE"-dec-osf"`echo "$UNAME_RELEASE" | sed -e 
's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`"
+       echo "$UNAME_MACHINE"-dec-osf"$(echo "$UNAME_RELEASE" | sed -e 
's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz)"
        # Reset EXIT trap before exiting to avoid spurious non-zero exit code.
        exitcode=$?
        trap '' 0
@@ -369,7 +369,7 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        exit ;;
     Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
        # akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
-       if test "`(/bin/universe) 2>/dev/null`" = att ; then
+       if test "$( (/bin/universe) 2>/dev/null)" = att ; then
                echo pyramid-pyramid-sysv3
        else
                echo pyramid-pyramid-bsd
@@ -382,17 +382,17 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        echo sparc-icl-nx6
        exit ;;
     DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
-       case `/usr/bin/uname -p` in
+       case $(/usr/bin/uname -p) in
            sparc) echo sparc-icl-nx7; exit ;;
        esac ;;
     s390x:SunOS:*:*)
-       echo "$UNAME_MACHINE"-ibm-solaris2"`echo "$UNAME_RELEASE" | sed -e 
's/[^.]*//'`"
+       echo "$UNAME_MACHINE"-ibm-solaris2"$(echo "$UNAME_RELEASE" | sed -e 
's/[^.]*//')"
        exit ;;
     sun4H:SunOS:5.*:*)
-       echo sparc-hal-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+       echo sparc-hal-solaris2"$(echo "$UNAME_RELEASE"|sed -e 's/[^.]*//')"
        exit ;;
     sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
-       echo sparc-sun-solaris2"`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`"
+       echo sparc-sun-solaris2"$(echo "$UNAME_RELEASE" | sed -e 's/[^.]*//')"
        exit ;;
     i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
        echo i386-pc-auroraux"$UNAME_RELEASE"
@@ -411,30 +411,30 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
                SUN_ARCH=x86_64
            fi
        fi
-       echo "$SUN_ARCH"-pc-solaris2"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+       echo "$SUN_ARCH"-pc-solaris2"$(echo "$UNAME_RELEASE"|sed -e 
's/[^.]*//')"
        exit ;;
     sun4*:SunOS:6*:*)
        # According to config.sub, this is the proper way to canonicalize
        # SunOS6.  Hard to guess exactly what SunOS6 will be like, but
        # it's likely to be more like Solaris than SunOS4.
-       echo sparc-sun-solaris3"`echo "$UNAME_RELEASE"|sed -e 's/[^.]*//'`"
+       echo sparc-sun-solaris3"$(echo "$UNAME_RELEASE"|sed -e 's/[^.]*//')"
        exit ;;
     sun4*:SunOS:*:*)
-       case "`/usr/bin/arch -k`" in
+       case "$(/usr/bin/arch -k)" in
            Series*|S4*)
-               UNAME_RELEASE=`uname -v`
+               UNAME_RELEASE=$(uname -v)
                ;;
        esac
        # Japanese Language versions have a version number like `4.1.3-JL'.
-       echo sparc-sun-sunos"`echo "$UNAME_RELEASE"|sed -e 's/-/_/'`"
+       echo sparc-sun-sunos"$(echo "$UNAME_RELEASE"|sed -e 's/-/_/')"
        exit ;;
     sun3*:SunOS:*:*)
        echo m68k-sun-sunos"$UNAME_RELEASE"
        exit ;;
     sun*:*:4.2BSD:*)
-       UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 
2>/dev/null`
+       UNAME_RELEASE=$( (sed 1q /etc/motd | awk '{print substr($5,1,3)}') 
2>/dev/null)
        test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3
-       case "`/bin/arch`" in
+       case "$(/bin/arch)" in
            sun3)
                echo m68k-sun-sunos"$UNAME_RELEASE"
                ;;
@@ -514,8 +514,8 @@ case 
"$UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION" in
        }
 EOF
        $CC_FOR_BUILD -o "$dummy" "$dummy.c" &&
-         dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` &&
-         SYSTEM_NAME=`"$dummy" "$dummyarg"` &&
+         dummyarg=$(echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p') &&
+         SYSTEM_NAME=$("$dummy" "$dummyarg") &&
            { echo "$SYSTEM_NAME"; exit; }
        echo mips-mips-riscos"$UNAME_RELEASE"
        exit ;;
@@ -542,7 +542,7 @@ EOF
        exit ;;
     AViiON:dgux:*:*)
        # DG/UX returns AViiON for all architectures
-       UNAME_PROCESSOR=`/usr/bin/uname -p`
+       UNAME_PROCESSOR=$(/usr/bin/uname -p)
        if test "$UNAME_PROCESSOR" = mc88100 || test "$UNAME_PROCESSOR" = 
mc88110
        then
            if test "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx || \
@@ -570,17 +570,17 @@ EOF
        echo m68k-tektronix-bsd
        exit ;;
     *:IRIX*:*:*)
-       echo mips-sgi-irix"`echo "$UNAME_RELEASE"|sed -e 's/-/_/g'`"
+       echo mips-sgi-irix"$(echo "$UNAME_RELEASE"|sed -e 's/-/_/g')"
        exit ;;
     ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
        echo romp-ibm-aix     # uname -m gives an 8 hex-code CPU id
-       exit ;;               # Note that: echo "'`uname -s`'" gives 'AIX '
+       exit ;;               # Note that: echo "'$(uname -s)'" gives 'AIX '
     i*86:AIX:*:*)
        echo i386-ibm-aix
        exit ;;
     ia64:AIX:*:*)
        if test -x /usr/bin/oslevel ; then
-               IBM_REV=`/usr/bin/oslevel`
+               IBM_REV=$(/usr/bin/oslevel)
        else
                IBM_REV="$UNAME_VERSION.$UNAME_RELEASE"
        fi
@@ -600,7 +600,7 @@ EOF
                        exit(0);
                        }
 EOF
-               if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && 
SYSTEM_NAME=`"$dummy"`
+               if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && 
SYSTEM_NAME=$("$dummy")
                then
                        echo "$SYSTEM_NAME"
                else
@@ -613,15 +613,15 @@ EOF
        fi
        exit ;;
     *:AIX:*:[4567])
-       IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk 
'{ print $1 }'`
+       IBM_CPU_ID=$(/usr/sbin/lsdev -C -c processor -S available | sed 1q | 
awk '{ print $1 }')
        if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; 
then
                IBM_ARCH=rs6000
        else
                IBM_ARCH=powerpc
        fi
        if test -x /usr/bin/lslpp ; then
-               IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc |
-                          awk -F: '{ print $3 }' | sed s/[0-9]*$/0/`
+               IBM_REV=$(/usr/bin/lslpp -Lqc bos.rte.libc |
+                          awk -F: '{ print $3 }' | sed s/[0-9]*$/0/)
        else
                IBM_REV="$UNAME_VERSION.$UNAME_RELEASE"
        fi
@@ -649,14 +649,14 @@ EOF
        echo m68k-hp-bsd4.4
        exit ;;
     9000/[34678]??:HP-UX:*:*)
-       HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'`
+       HPUX_REV=$(echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//')
        case "$UNAME_MACHINE" in
            9000/31?)            HP_ARCH=m68000 ;;
            9000/[34]??)         HP_ARCH=m68k ;;
            9000/[678][0-9][0-9])
                if test -x /usr/bin/getconf; then
-                   sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
-                   sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
+                   sc_cpu_version=$(/usr/bin/getconf SC_CPU_VERSION 
2>/dev/null)
+                   sc_kernel_bits=$(/usr/bin/getconf SC_KERNEL_BITS 
2>/dev/null)
                    case "$sc_cpu_version" in
                      523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0
                      528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1
@@ -703,7 +703,7 @@ EOF
                    exit (0);
                }
 EOF
-                   (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 
2>/dev/null) && HP_ARCH=`"$dummy"`
+                   (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 
2>/dev/null) && HP_ARCH=$("$dummy")
                    test -z "$HP_ARCH" && HP_ARCH=hppa
                fi ;;
        esac
@@ -731,7 +731,7 @@ EOF
        echo "$HP_ARCH"-hp-hpux"$HPUX_REV"
        exit ;;
     ia64:HP-UX:*:*)
-       HPUX_REV=`echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//'`
+       HPUX_REV=$(echo "$UNAME_RELEASE"|sed -e 's/[^.]*.[0B]*//')
        echo ia64-hp-hpux"$HPUX_REV"
        exit ;;
     3050*:HI-UX:*:*)
@@ -761,7 +761,7 @@ EOF
          exit (0);
        }
 EOF
-       $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` &&
+       $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=$("$dummy") &&
                { echo "$SYSTEM_NAME"; exit; }
        echo unknown-hitachi-hiuxwe2
        exit ;;
@@ -830,14 +830,14 @@ EOF
        echo craynv-cray-unicosmp"$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'
        exit ;;
     F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
-       FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz`
-       FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
-       FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'`
+       FUJITSU_PROC=$(uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz)
+       FUJITSU_SYS=$(uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz | sed -e 's/\///')
+       FUJITSU_REL=$(echo "$UNAME_RELEASE" | sed -e 's/ /_/')
        echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
        exit ;;
     5000:UNIX_System_V:4.*:*)
-       FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
-       FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'`
+       FUJITSU_SYS=$(uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz | sed -e 's/\///')
+       FUJITSU_REL=$(echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ 
abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/')
        echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
        exit ;;
     i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
@@ -850,25 +850,25 @@ EOF
        echo "$UNAME_MACHINE"-unknown-bsdi"$UNAME_RELEASE"
        exit ;;
     arm:FreeBSD:*:*)
-       UNAME_PROCESSOR=`uname -p`
+       UNAME_PROCESSOR=$(uname -p)
        set_cc_for_build
        if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
            | grep -q __ARM_PCS_VFP
        then
-           echo "${UNAME_PROCESSOR}"-unknown-freebsd"`echo 
${UNAME_RELEASE}|sed -e 's/[-(].*//'`"-gnueabi
+           echo "${UNAME_PROCESSOR}"-unknown-freebsd"$(echo 
${UNAME_RELEASE}|sed -e 's/[-(].*//')"-gnueabi
        else
-           echo "${UNAME_PROCESSOR}"-unknown-freebsd"`echo 
${UNAME_RELEASE}|sed -e 's/[-(].*//'`"-gnueabihf
+           echo "${UNAME_PROCESSOR}"-unknown-freebsd"$(echo 
${UNAME_RELEASE}|sed -e 's/[-(].*//')"-gnueabihf
        fi
        exit ;;
     *:FreeBSD:*:*)
-       UNAME_PROCESSOR=`/usr/bin/uname -p`
+       UNAME_PROCESSOR=$(/usr/bin/uname -p)
        case "$UNAME_PROCESSOR" in
            amd64)
                UNAME_PROCESSOR=x86_64 ;;
            i386)
                UNAME_PROCESSOR=i586 ;;
        esac
-       echo "$UNAME_PROCESSOR"-unknown-freebsd"`echo "$UNAME_RELEASE"|sed -e 
's/[-(].*//'`"
+       echo "$UNAME_PROCESSOR"-unknown-freebsd"$(echo "$UNAME_RELEASE"|sed -e 
's/[-(].*//')"
        exit ;;
     i*:CYGWIN*:*)
        echo "$UNAME_MACHINE"-pc-cygwin
@@ -904,15 +904,15 @@ EOF
        echo x86_64-pc-cygwin
        exit ;;
     prep*:SunOS:5.*:*)
-       echo powerpcle-unknown-solaris2"`echo "$UNAME_RELEASE"|sed -e 
's/[^.]*//'`"
+       echo powerpcle-unknown-solaris2"$(echo "$UNAME_RELEASE"|sed -e 
's/[^.]*//')"
        exit ;;
     *:GNU:*:*)
        # the GNU system
-       echo "`echo "$UNAME_MACHINE"|sed -e 's,[-/].*$,,'`-unknown-$LIBC`echo 
"$UNAME_RELEASE"|sed -e 's,/.*$,,'`"
+       echo "$(echo "$UNAME_MACHINE"|sed -e 's,[-/].*$,,')-unknown-$LIBC$(echo 
"$UNAME_RELEASE"|sed -e 's,/.*$,,')"
        exit ;;
     *:GNU/*:*:*)
        # other systems with GNU libc and userland
-       echo "$UNAME_MACHINE-unknown-`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' 
| tr "[:upper:]" "[:lower:]"``echo "$UNAME_RELEASE"|sed -e 's/[-(].*//'`-$LIBC"
+       echo "$UNAME_MACHINE-unknown-$(echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' 
| tr "[:upper:]" "[:lower:]")$(echo "$UNAME_RELEASE"|sed -e 's/[-(].*//')-$LIBC"
        exit ;;
     *:Minix:*:*)
        echo "$UNAME_MACHINE"-unknown-minix
@@ -925,7 +925,7 @@ EOF
        echo "$UNAME_MACHINE"-unknown-linux-"$LIBC"
        exit ;;
     alpha:Linux:*:*)
-       case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 
2>/dev/null` in
+       case $(sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 
2>/dev/null) in
          EV5)   UNAME_MACHINE=alphaev5 ;;
          EV56)  UNAME_MACHINE=alphaev56 ;;
          PCA56) UNAME_MACHINE=alphapca56 ;;
@@ -1034,7 +1034,7 @@ EOF
        #endif
        #endif
 EOF
-       eval "`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep 
'^CPU\|^MIPS_ENDIAN\|^LIBCABI'`"
+       eval "$($CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep 
'^CPU\|^MIPS_ENDIAN\|^LIBCABI')"
        test "x$CPU" != x && { echo 
"$CPU${MIPS_ENDIAN}-unknown-linux-$LIBCABI"; exit; }
        ;;
     mips64el:Linux:*:*)
@@ -1054,7 +1054,7 @@ EOF
        exit ;;
     parisc:Linux:*:* | hppa:Linux:*:*)
        # Look for CPU level
-       case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
+       case $(grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2) in
          PA7*) echo hppa1.1-unknown-linux-"$LIBC" ;;
          PA8*) echo hppa2.0-unknown-linux-"$LIBC" ;;
          *)    echo hppa-unknown-linux-"$LIBC" ;;
@@ -1144,7 +1144,7 @@ EOF
        echo "$UNAME_MACHINE"-pc-msdosdjgpp
        exit ;;
     i*86:*:4.*:*)
-       UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'`
+       UNAME_REL=$(echo "$UNAME_RELEASE" | sed 's/\/MP$//')
        if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
                echo "$UNAME_MACHINE"-univel-sysv"$UNAME_REL"
        else
@@ -1153,7 +1153,7 @@ EOF
        exit ;;
     i*86:*:5:[678]*)
        # UnixWare 7.x, OpenUNIX and OpenServer 6.
-       case `/bin/uname -X | grep "^Machine"` in
+       case $(/bin/uname -X | grep "^Machine") in
            *486*)           UNAME_MACHINE=i486 ;;
            *Pentium)        UNAME_MACHINE=i586 ;;
            *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
@@ -1162,10 +1162,10 @@ EOF
        exit ;;
     i*86:*:3.2:*)
        if test -f /usr/options/cb.name; then
-               UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
+               UNAME_REL=$(sed -n 's/.*Version //p' </usr/options/cb.name)
                echo "$UNAME_MACHINE"-pc-isc"$UNAME_REL"
        elif /bin/uname -X 2>/dev/null >/dev/null ; then
-               UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
+               UNAME_REL=$( (/bin/uname -X|grep Release|sed -e 's/.*= //'))
                (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
                (/bin/uname -X|grep '^Machine.*Pentium' >/dev/null) \
                        && UNAME_MACHINE=i586
@@ -1215,7 +1215,7 @@ EOF
     3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 
3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | 
SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
        OS_REL=''
        test -r /etc/.relid \
-       && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
+       && OS_REL=.$(sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid)
        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
          && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
        /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
@@ -1226,7 +1226,7 @@ EOF
     NCR*:*:4.2:* | MPRAS*:*:4.2:*)
        OS_REL='.3'
        test -r /etc/.relid \
-           && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < 
/etc/.relid`
+           && OS_REL=.$(sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < 
/etc/.relid)
        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
            && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
        /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
@@ -1259,7 +1259,7 @@ EOF
        exit ;;
     *:SINIX-*:*:*)
        if uname -p 2>/dev/null >/dev/null ; then
-               UNAME_MACHINE=`(uname -p) 2>/dev/null`
+               UNAME_MACHINE=$( (uname -p) 2>/dev/null)
                echo "$UNAME_MACHINE"-sni-sysv4
        else
                echo ns32k-sni-sysv
@@ -1345,7 +1345,7 @@ EOF
        echo aarch64-apple-darwin"$UNAME_RELEASE"
        exit ;;
     *:Darwin:*:*)
-       UNAME_PROCESSOR=`uname -p`
+       UNAME_PROCESSOR=$(uname -p)
        case $UNAME_PROCESSOR in
            unknown) UNAME_PROCESSOR=powerpc ;;
        esac
@@ -1382,7 +1382,7 @@ EOF
        echo "$UNAME_PROCESSOR"-apple-darwin"$UNAME_RELEASE"
        exit ;;
     *:procnto*:*:* | *:QNX:[0123456789]*:*)
-       UNAME_PROCESSOR=`uname -p`
+       UNAME_PROCESSOR=$(uname -p)
        if test "$UNAME_PROCESSOR" = x86; then
                UNAME_PROCESSOR=i386
                UNAME_MACHINE=pc
@@ -1450,10 +1450,10 @@ EOF
        echo mips-sei-seiux"$UNAME_RELEASE"
        exit ;;
     *:DragonFly:*:*)
-       echo "$UNAME_MACHINE"-unknown-dragonfly"`echo "$UNAME_RELEASE"|sed -e 
's/[-(].*//'`"
+       echo "$UNAME_MACHINE"-unknown-dragonfly"$(echo "$UNAME_RELEASE"|sed -e 
's/[-(].*//')"
        exit ;;
     *:*VMS:*:*)
-       UNAME_MACHINE=`(uname -p) 2>/dev/null`
+       UNAME_MACHINE=$( (uname -p) 2>/dev/null)
        case "$UNAME_MACHINE" in
            A*) echo alpha-dec-vms ; exit ;;
            I*) echo ia64-dec-vms ; exit ;;
@@ -1463,7 +1463,7 @@ EOF
        echo i386-pc-xenix
        exit ;;
     i*86:skyos:*:*)
-       echo "$UNAME_MACHINE"-pc-skyos"`echo "$UNAME_RELEASE" | sed -e 's/ 
.*$//'`"
+       echo "$UNAME_MACHINE"-pc-skyos"$(echo "$UNAME_RELEASE" | sed -e 's/ 
.*$//')"
        exit ;;
     i*86:rdos:*:*)
        echo "$UNAME_MACHINE"-pc-rdos
@@ -1521,7 +1521,7 @@ main ()
 #define __ARCHITECTURE__ "m68k"
 #endif
   int version;
-  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
+  version=$( (hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 
2>/dev/null);
   if (version < 4)
     printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
   else
@@ -1613,7 +1613,7 @@ main ()
 }
 EOF
 
-$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=`$dummy` &&
+$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=$($dummy) &&
        { echo "$SYSTEM_NAME"; exit; }
 
 # Apollos put the system type in the environment.
@@ -1643,9 +1643,9 @@ and
   https://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub
 EOF
 
-year=`echo $timestamp | sed 's,-.*,,'`
+year=$(echo $timestamp | sed 's,-.*,,')
 # shellcheck disable=SC2003
-if test "`expr "\`date +%Y\`" - "$year"`" -lt 3 ; then
+if test "$(expr "$(date +%Y)" - "$year")" -lt 3 ; then
    cat >&2 <<EOF
 
 If $0 has already been updated, send the following data and any
@@ -1654,20 +1654,20 @@ provide the necessary information to handle your system.
 
 config.guess timestamp = $timestamp
 
-uname -m = `(uname -m) 2>/dev/null || echo unknown`
-uname -r = `(uname -r) 2>/dev/null || echo unknown`
-uname -s = `(uname -s) 2>/dev/null || echo unknown`
-uname -v = `(uname -v) 2>/dev/null || echo unknown`
+uname -m = $( (uname -m) 2>/dev/null || echo unknown)
+uname -r = $( (uname -r) 2>/dev/null || echo unknown)
+uname -s = $( (uname -s) 2>/dev/null || echo unknown)
+uname -v = $( (uname -v) 2>/dev/null || echo unknown)
 
-/usr/bin/uname -p = `(/usr/bin/uname -p) 2>/dev/null`
-/bin/uname -X     = `(/bin/uname -X) 2>/dev/null`
+/usr/bin/uname -p = $( (/usr/bin/uname -p) 2>/dev/null)
+/bin/uname -X     = $( (/bin/uname -X) 2>/dev/null)
 
-hostinfo               = `(hostinfo) 2>/dev/null`
-/bin/universe          = `(/bin/universe) 2>/dev/null`
-/usr/bin/arch -k       = `(/usr/bin/arch -k) 2>/dev/null`
-/bin/arch              = `(/bin/arch) 2>/dev/null`
-/usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
-/usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
+hostinfo               = $( (hostinfo) 2>/dev/null)
+/bin/universe          = $( (/bin/universe) 2>/dev/null)
+/usr/bin/arch -k       = $( (/usr/bin/arch -k) 2>/dev/null)
+/bin/arch              = $( (/bin/arch) 2>/dev/null)
+/usr/bin/oslevel       = $( (/usr/bin/oslevel) 2>/dev/null)
+/usr/convex/getsysinfo = $( (/usr/convex/getsysinfo) 2>/dev/null)
 
 UNAME_MACHINE = "$UNAME_MACHINE"
 UNAME_RELEASE = "$UNAME_RELEASE"
diff --git a/build-aux/config.sub b/build-aux/config.sub
index 8167d08..c874b7a 100755
--- a/build-aux/config.sub
+++ b/build-aux/config.sub
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2020 Free Software Foundation, Inc.
 
-timestamp='2020-10-13'
+timestamp='2020-11-07'
 
 # This file is free software; you can redistribute it and/or modify it
 # under the terms of the GNU General Public License as published by
@@ -50,7 +50,7 @@ timestamp='2020-10-13'
 #      CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
 # It is wrong to echo any other type of specification.
 
-me=`echo "$0" | sed -e 's,.*/,,'`
+me=$(echo "$0" | sed -e 's,.*/,,')
 
 usage="\
 Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS
@@ -769,22 +769,22 @@ case $basic_machine in
                vendor=hp
                ;;
        i*86v32)
-               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               cpu=$(echo "$1" | sed -e 's/86.*/86/')
                vendor=pc
                basic_os=sysv32
                ;;
        i*86v4*)
-               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               cpu=$(echo "$1" | sed -e 's/86.*/86/')
                vendor=pc
                basic_os=sysv4
                ;;
        i*86v)
-               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               cpu=$(echo "$1" | sed -e 's/86.*/86/')
                vendor=pc
                basic_os=sysv
                ;;
        i*86sol2)
-               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               cpu=$(echo "$1" | sed -e 's/86.*/86/')
                vendor=pc
                basic_os=solaris2
                ;;
@@ -917,7 +917,7 @@ case $basic_machine in
                ;;
        leon-*|leon[3-9]-*)
                cpu=sparc
-               vendor=`echo "$basic_machine" | sed 's/-.*//'`
+               vendor=$(echo "$basic_machine" | sed 's/-.*//')
                ;;
 
        *-*)
@@ -1084,7 +1084,7 @@ case $cpu-$vendor in
                cpu=mipsisa64sb1el
                ;;
        sh5e[lb]-*)
-               cpu=`echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/'`
+               cpu=$(echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/')
                ;;
        spur-*)
                cpu=spur
@@ -1102,7 +1102,7 @@ case $cpu-$vendor in
                cpu=x86_64
                ;;
        xscale-* | xscalee[bl]-*)
-               cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
+               cpu=$(echo "$cpu" | sed 's/^xscale/arm/')
                ;;
        arm64-*)
                cpu=aarch64
@@ -1286,15 +1286,15 @@ then
 case $basic_os in
        gnu/linux*)
                kernel=linux
-               os=`echo $basic_os | sed -e 's|gnu/linux|gnu|'`
+               os=$(echo $basic_os | sed -e 's|gnu/linux|gnu|')
                ;;
        os2-emx)
                kernel=os2
-               os=`echo $basic_os | sed -e 's|os2-emx|emx|'`
+               os=$(echo $basic_os | sed -e 's|os2-emx|emx|')
                ;;
        nto-qnx*)
                kernel=nto
-               os=`echo $basic_os | sed -e 's|nto-qnx|qnx|'`
+               os=$(echo $basic_os | sed -e 's|nto-qnx|qnx|')
                ;;
        *-*)
                # shellcheck disable=SC2162
@@ -1305,11 +1305,11 @@ EOF
        # Default OS when just kernel was specified
        nto*)
                kernel=nto
-               os=`echo $basic_os | sed -e 's|nto|qnx|'`
+               os=$(echo $basic_os | sed -e 's|nto|qnx|')
                ;;
        linux*)
                kernel=linux
-               os=`echo $basic_os | sed -e 's|linux|gnu|'`
+               os=$(echo $basic_os | sed -e 's|linux|gnu|')
                ;;
        *)
                kernel=
@@ -1330,7 +1330,7 @@ case $os in
                os=cnk
                ;;
        solaris1 | solaris1.*)
-               os=`echo $os | sed -e 's|solaris1|sunos4|'`
+               os=$(echo $os | sed -e 's|solaris1|sunos4|')
                ;;
        solaris)
                os=solaris2
@@ -1359,7 +1359,7 @@ case $os in
                os=sco3.2v4
                ;;
        sco3.2.[4-9]*)
-               os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
+               os=$(echo $os | sed -e 's/sco3.2./sco3.2v/')
                ;;
        sco*v* | scout)
                # Don't match below
@@ -1389,7 +1389,7 @@ case $os in
                os=lynxos
                ;;
        mac[0-9]*)
-               os=`echo "$os" | sed -e 's|mac|macos|'`
+               os=$(echo "$os" | sed -e 's|mac|macos|')
                ;;
        opened*)
                os=openedition
@@ -1398,10 +1398,10 @@ case $os in
                os=os400
                ;;
        sunos5*)
-               os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
+               os=$(echo "$os" | sed -e 's|sunos5|solaris2|')
                ;;
        sunos6*)
-               os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
+               os=$(echo "$os" | sed -e 's|sunos6|solaris3|')
                ;;
        wince*)
                os=wince
@@ -1435,7 +1435,7 @@ case $os in
                ;;
        # Preserve the version number of sinix5.
        sinix5.*)
-               os=`echo $os | sed -e 's|sinix|sysv|'`
+               os=$(echo $os | sed -e 's|sinix|sysv|')
                ;;
        sinix*)
                os=sysv4
diff --git a/build-aux/install-sh b/build-aux/install-sh
index b34a8fc..ec298b5 100755
--- a/build-aux/install-sh
+++ b/build-aux/install-sh
@@ -1,7 +1,7 @@
 #!/bin/sh
 # install - install a program, script, or datafile
 
-scriptversion=2020-07-26.22; # UTC
+scriptversion=2020-11-14.01; # UTC
 
 # This originates from X11R5 (mit/util/scripts/install.sh), which was
 # later released in X11R6 (xc/config/util/install.sh) with the
@@ -73,6 +73,7 @@ mode=0755
 # This is like GNU 'install' as of coreutils 8.32 (2020).
 mkdir_umask=22
 
+backupsuffix=
 chgrpcmd=
 chmodcmd=$chmodprog
 chowncmd=
@@ -103,18 +104,28 @@ Options:
      --version  display version info and exit.
 
   -c            (ignored)
-  -C            install only if different (preserve the last data modification 
time)
+  -C            install only if different (preserve data modification time)
   -d            create directories instead of installing files.
   -g GROUP      $chgrpprog installed files to GROUP.
   -m MODE       $chmodprog installed files to MODE.
   -o USER       $chownprog installed files to USER.
+  -p            pass -p to $cpprog.
   -s            $stripprog installed files.
+  -S SUFFIX     attempt to back up existing files, with suffix SUFFIX.
   -t DIRECTORY  install into DIRECTORY.
   -T            report an error if DSTFILE is a directory.
 
 Environment variables override the default commands:
   CHGRPPROG CHMODPROG CHOWNPROG CMPPROG CPPROG MKDIRPROG MVPROG
   RMPROG STRIPPROG
+
+By default, rm is invoked with -f; when overridden with RMPROG,
+it's up to you to specify -f if you want it.
+
+If -S is not specified, no backups are attempted.
+
+Email bug reports to bug-automake@gnu.org.
+Automake home page: https://www.gnu.org/software/automake/
 "
 
 while test $# -ne 0; do
@@ -141,8 +152,13 @@ while test $# -ne 0; do
     -o) chowncmd="$chownprog $2"
         shift;;
 
+    -p) cpprog="$cpprog -p";;
+
     -s) stripcmd=$stripprog;;
 
+    -S) backupsuffix="$2"
+        shift;;
+
     -t)
         is_target_a_directory=always
         dst_arg=$2
@@ -259,6 +275,10 @@ do
     dstdir=$dst
     test -d "$dstdir"
     dstdir_status=$?
+    # Don't chown directories that already exist.
+    if test $dstdir_status = 0; then
+      chowncmd=""
+    fi
   else
 
     # Waiting for this to be detected by the "$cpprog $src $dsttmp" command
@@ -473,6 +493,13 @@ do
     then
       rm -f "$dsttmp"
     else
+      # If $backupsuffix is set, and the file being installed
+      # already exists, attempt a backup.  Don't worry if it fails,
+      # e.g., if mv doesn't support -f.
+      if test -n "$backupsuffix" && test -f "$dst"; then
+        $doit $mvcmd -f "$dst" "$dst$backupsuffix" 2>/dev/null
+      fi
+
       # Rename the file to the real destination.
       $doit $mvcmd -f "$dsttmp" "$dst" 2>/dev/null ||
 
@@ -487,9 +514,9 @@ do
         # file should still install successfully.
         {
           test ! -f "$dst" ||
-          $doit $rmcmd -f "$dst" 2>/dev/null ||
+          $doit $rmcmd "$dst" 2>/dev/null ||
           { $doit $mvcmd -f "$dst" "$rmtmp" 2>/dev/null &&
-            { $doit $rmcmd -f "$rmtmp" 2>/dev/null; :; }
+            { $doit $rmcmd "$rmtmp" 2>/dev/null; :; }
           } ||
           { echo "$0: cannot unlink or rename $dst" >&2
             (exit 1); exit 1

-----------------------------------------------------------------------

Summary of changes:
 build-aux/ChangeLog    |   4 ++
 build-aux/config.guess | 186 ++++++++++++++++++++++++-------------------------
 build-aux/config.sub   |  40 +++++------
 build-aux/install-sh   |  35 ++++++++--
 4 files changed, 148 insertions(+), 117 deletions(-)


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