+
+AC_DEFUN([PSPP_CHECK_CLICKSEQUENCE],
+ [AC_REQUIRE([AM_INIT_AUTOMAKE]) # Defines MAKEINFO
+ AC_CACHE_CHECK([whether makeinfo supports @clicksequence],
+ [pspp_cv_have_clicksequence],
+ [cat > conftest.texi <<EOF
+@setfilename conftest.info
+@clicksequence{File @click{} Open}
+EOF
+ echo "configure:__oline__: running $MAKEINFO conftest.texi >&AS_MESSAGE_LOG_FD" >&AS_MESSAGE_LOG_FD
+ eval "$MAKEINFO conftest.texi >&AS_MESSAGE_LOG_FD 2>&1"
+ retval=$?
+ echo "configure:__oline__: \$? = $retval" >&AS_MESSAGE_LOG_FD
+ if test $retval = 0; then
+ pspp_cv_have_clicksequence=yes
+ else
+ pspp_cv_have_clicksequence=no
+ fi
+ rm -f conftest.texi conftest.info])
+ if test $pspp_cv_have_clicksequence = no; then
+ AC_MSG_ERROR([$MAKEINFO does not support @clicksequence.
+Please install a newer or working version, or point the MAKEINFO variable
+to one that is already installed.])
+ fi])
+
+dnl Texinfo 4.13 generates broken DocBook XML. Probably other old
+dnl versions do too, but that's the one that causes problems.
+AC_DEFUN([PSPP_CHECK_MAKEINFO_DOCBOOK_XML],
+ [AC_REQUIRE([AM_INIT_AUTOMAKE]) # Defines MAKEINFO
+ AC_CACHE_CHECK(
+ [whether makeinfo generates broken DocBook XML],
+ [pspp_cv_broken_docbook_xml],
+ [AS_CASE(
+ [$(eval "$MAKEINFO --version | head -1")],
+ [*texinfo*4.13*], [pspp_cv_broken_docbook_xml=yes],
+ [*texinfo*], [pspp_cv_broken_docbook_xml=no],
+ [*], [pspp_cv_broken_docbook_xml=yes])])
+ AM_CONDITIONAL(
+ [BROKEN_DOCBOOK_XML], [test "$pspp_cv_broken_docbook_xml" = yes])])
+
+# The following comes from Open vSwitch:
+# ----------------------------------------------------------------------
+# Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+dnl PSPP_ENABLE_WERROR
+AC_DEFUN([PSPP_ENABLE_WERROR],
+ [AC_ARG_ENABLE(
+ [Werror],
+ [AS_HELP_STRING([--enable-Werror], [Add -Werror to CFLAGS])],
+ [], [enable_Werror=no])
+ AC_CONFIG_COMMANDS_PRE(
+ [if test "X$enable_Werror" = Xyes; then
+ CFLAGS="$CFLAGS -Werror -Wno-error=deprecated-declarations"
+ # gnulib needs this, for now:
+ CFLAGS="$CFLAGS -Wno-error=attributes"
+ fi])])
+
+# The following comes from Open vSwitch:
+# ----------------------------------------------------------------------
+# Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015 Nicira, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at:
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+dnl Checks for dot.
+AC_DEFUN([PSPP_CHECK_DOT],
+ [AC_CACHE_CHECK(
+ [for dot],
+ [pspp_cv_dot],
+ [dnl "dot" writes -V output to stderr:
+ if (dot -V) 2>&1 | grep '^dot - [[gG]]raphviz version' >/dev/null 2>&1; then
+ pspp_cv_dot=yes
+ else
+ pspp_cv_dot=no
+ fi])
+ AM_CONDITIONAL([HAVE_DOT], [test "$pspp_cv_dot" = yes])])
+
+
+dnl Check that xgettext is sufficiently recent
+dnl Before calling this macro, AC_CHECK_PROGS([XGETTEXT], [xgettext]) should have been called,
+dnl which sets the ac_cv_prog_XGETTEXT cache variable.
+AC_DEFUN([PSPP_CHECK_XGETTEXT],
+ [AC_CACHE_CHECK([whether gettext is sufficiently recent],
+ [pspp_cv_progrecent_xgettext],
+ [pspp_cv_progrecent_xgettext=maybe
+ ver=`$ac_cv_prog_XGETTEXT --version | sed -n -e '/xgettext/s/[[^0-9]]*\([[0-9\.]][[0-9\.]]*\).*/\1/p'`
+ case $ver in # (
+ *.*.*) ;; # (
+ *.*) ver="$ver.0" ;;
+ esac
+ majmin=`echo $ver | sed -e 's/\.[[0-9]]*$//'`
+ major=`echo $majmin | sed -e 's/\.[[0-9]]*$//'`
+ minor=`echo $majmin | sed -e 's/^[[0-9]]*\.//'`
+ if test "$major" -lt 0; then
+ pspp_cv_progrecent_xgettext=no;
+ elif test "$minor" -lt 20; then
+ pspp_cv_progrecent_xgettext=no
+ else
+ pspp_cv_progrecent_xgettext=yes
+ fi])])