+Notfound()
+{
+ echo "Error: $* not found!"
+ echo 'Please install supported versions of GNU autoconf, GNU automake'
+ echo 'and pkg-config: see the INSTALL file for details.'
+ exit 1
+}
+
+Run()
+{
+ [ "$VERBOSE" = "1" ] && echo " - running \"$*\" ..."
+ "$@"
+}
+
+# Reset locale settings to suppress warning messages of Perl
+unset LC_ALL
+unset LANG
+
+# Which command should be used to detect the automake/autoconf tools?
+[ -z "$EXIST" ] && existlist="type which" || existlist="$EXIST"
+EXIST=""
+for t in $existlist; do
+ $t /bin/ls >/dev/null 2>&1
+ if [ $? -eq 0 ]; then
+ rm -f /tmp/test.$$
+ $t /tmp/test.$$ >/dev/null 2>&1
+ [ $? -ne 0 ] && EXIST="$t"
+ fi
+ [ -n "$EXIST" ] && break
+done
+if [ -z "$EXIST" ]; then
+ echo "Didn't detect a working command to test for the autoconf/automake tools!"
+ echo "Searchlist: $existlist"
+ exit 1
+fi
+[ "$VERBOSE" = "1" ] && echo "Using \"$EXIST\" to test for tools."
+
+# Try to detect the needed tools when no environment variable already
+# specifies one:
+echo "Searching for required tools ..."
+[ -z "$ACLOCAL" ] && ACLOCAL=$(Search aclocal 1 11)
+[ "$VERBOSE" = "1" ] && echo " - ACLOCAL=$ACLOCAL"
+[ -z "$AUTOHEADER" ] && AUTOHEADER=$(Search autoheader 2)
+[ "$VERBOSE" = "1" ] && echo " - AUTOHEADER=$AUTOHEADER"
+[ -z "$AUTOMAKE" ] && AUTOMAKE=$(Search automake 1 11)
+[ "$VERBOSE" = "1" ] && echo " - AUTOMAKE=$AUTOMAKE"
+[ -z "$AUTOCONF" ] && AUTOCONF=$(Search autoconf 2)
+[ "$VERBOSE" = "1" ] && echo " - AUTOCONF=$AUTOCONF"
+
+AUTOCONF_VERSION=$(echo "$AUTOCONF" | cut -d'-' -f2-)
+[ -n "$AUTOCONF_VERSION" ] && [ "$AUTOCONF_VERSION" != "autoconf" ] \
+ && export AUTOCONF_VERSION || unset AUTOCONF_VERSION
+[ "$VERBOSE" = "1" ] && echo " - AUTOCONF_VERSION=$AUTOCONF_VERSION"
+AUTOMAKE_VERSION=$(echo $AUTOMAKE | cut -d'-' -f2-)
+[ -n "$AUTOMAKE_VERSION" ] && [ "$AUTOMAKE_VERSION" != "automake" ] \
+ && export AUTOMAKE_VERSION || unset AUTOMAKE_VERSION
+[ "$VERBOSE" = "1" ] && echo " - AUTOMAKE_VERSION=$AUTOMAKE_VERSION"
+
+[ $# -gt 0 ] && CONFIGURE_ARGS=" $*" || CONFIGURE_ARGS=""
+[ -z "$GO" ] && [ -n "$CONFIGURE_ARGS" ] && GO=1
+
+# Verify that all tools have been found
+command -v pkg-config >/dev/null || Notfound pkg-config
+[ -z "$ACLOCAL" ] && Notfound aclocal
+[ -z "$AUTOHEADER" ] && Notfound autoheader
+[ -z "$AUTOMAKE" ] && Notfound automake
+[ -z "$AUTOCONF" ] && Notfound autoconf
+
+AM_VERSION=$($AUTOMAKE --version | head -n 1 | sed -e 's/.* //g')
+ifs=$IFS; IFS="."; set $AM_VERSION; IFS=$ifs
+AM_MAJOR="$1"; AM_MINOR="$2"
+echo "Detected automake $AM_VERSION ..."
+
+AM_MAKEFILES="src/ipaddr/Makefile.ng src/ngircd/Makefile.ng src/testsuite/Makefile.ng src/tool/Makefile.ng"
+
+# De-ANSI-fication?
+if [ "$AM_MAJOR" -eq "1" ] && [ "$AM_MINOR" -lt "12" ]; then
+ # automake < 1.12 => automatic de-ANSI-fication support available
+ echo " - Enabling de-ANSI-fication support."
+ sed -e "s|^__ng_PROTOTYPES__|AM_C_PROTOTYPES|g" configure.ng >configure.ac
+ DEANSI_START=""
+ DEANSI_END=""
+else
+ # automake >= 1.12 => no de-ANSI-fication support available
+ echo " - Disabling de-ANSI-fication support."
+ sed -e "s|^__ng_PROTOTYPES__|AC_C_PROTOTYPES|g" configure.ng >configure.ac
+ DEANSI_START="#"
+ DEANSI_END=" (disabled by ./autogen.sh script)"
+fi
+# Serial test harness?
+if [ "$AM_MAJOR" -eq "1" ] && [ "$AM_MINOR" -ge "13" ]; then
+ # automake >= 1.13 => enforce "serial test harness"
+ echo " - Enforcing serial test harness."
+ SERIAL_TESTS="serial-tests"
+else
+ # automake < 1.13 => no new test harness, nothing to do
+ # shellcheck disable=SC2034
+ SERIAL_TEST=""