dnl Documentation needs only be built when extending it, so never mind if it
dnl cannot find those helpers:
AC_PATH_PROG(DOXYGEN, doxygen, "")
+AM_CONDITIONAL(CONFIG_DOXYGEN, [test ! -z "$DOXYGEN"])
AC_PATH_PROG(LATEX, latex, "")
AC_PATH_PROG(PDFLATEX, pdflatex, "")
AC_PATH_PROG(MAKEINDEX, makeindex, "")
AC_PATH_PROG(DVIPS, dvips, "")
+AM_CONDITIONAL(CONFIG_TEX, [test ! \( -z "$LATEX" -o -z $"PDFLATEX" -o -z "$MAKEINDEX" -o -z "$DVIPS" \)])
AC_PATH_PROG(FIG2DEV, fig2dev, "")
+AM_CONDITIONAL(CONFIG_FIG2DEV, [test ! -z "$FIG2DEV"])
dnl Output makefiles etc.
AC_CONFIG_FILES([