mkvtoolnix/ac/ax_docbook.m4

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# It's just rude to go over the net to build
XSLTPROC_FLAGS=--nonet
DOCBOOK_ROOT=
for i in /usr/share/xml/docbook/stylesheet/xsl/nwalsh/manpages /usr/share/xml/docbook/stylesheet/nwalsh/manpages /usr/share/xml/docbook/xsl-stylesheets/manpages; do
if test -d "$i"; then
DOCBOOK_ROOT=$i
fi
done
AC_PATH_PROG(XSLTPROC, xsltproc)
if test "$XSLTPROC" != ""; then
DOCBOOK_MANPAGES_STYLESHEET=$DOCBOOK_ROOT/docbook.xsl
if test -n "$XSLTPROC"; then
AC_CACHE_CHECK([whether xsltproc works],
[ac_cv_xsltproc_works],
[
ac_cv_xsltproc_works=no
$XSLTPROC $XSLTPROC_FLAGS $DOCBOOK_MANPAGES_STYLESHEET >/dev/null 2>/dev/null << END
<?xml version="1.0" encoding='ISO-8859-1'?>
<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN" "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd">
<book id="test">
</book>
END
if test "$?" = 0; then
ac_cv_xsltproc_works=yes
fi
])
XSLTPROC_WORKS=$ac_cv_xsltproc_works
fi
fi
AC_SUBST(DOCBOOK_ROOT)
AC_SUBST(DOCBOOK_MANPAGES_STYLESHEET)
AC_SUBST(XSLTPROC)
AC_SUBST(XSLTPROC_FLAGS)
AC_SUBST(XSLTPROC_WORKS)