Enforce makeinfo version

	* m4/sxe-bldchain-progs.m4: Verify that makeinfo version is at
	least 5.x

Signed-off-by: Nelson Ferreira <nelson.ferreira@ieee.org>

diff --git a/m4/sxe-bldchain-progs.m4 b/m4/sxe-bldchain-progs.m4
index ebd9adf..3bb5f35 100644 (file)
--- a/m4/sxe-bldchain-progs.m4
+++ b/m4/sxe-bldchain-progs.m4
@@ -17,7 +17,20 @@ For more details see the INSTALL and PROBLEMS files.
 SXEmacs generates the documentation during the build process.])
                exit 1
        fi
+       SXE_MSG_CHECKING([makeinfo version])
+        makeinfo_ver=`eval "$MAKEINFO" --version 2> /dev/null | head -n 1`
+       SXE_MSG_RESULT([${makeinfo_ver}])
+       AC_DEFINE_UNQUOTED(MAKEINFO_VERSION, "${makeinfo_ver}",
+                         [the makeinfo command version])
+        case `echo "$makeinfo_ver" | $SED -e 's/^.* \([[0-9.]]*\).*/\1/'`  in
+           [[1234]].*)
+               AC_MSG_ERROR([
+Your makeinfo program is too old. Please install 5.x or later.])
+               exit 1
+           ;;
+        esac
        AC_SUBST(MAKEINFO)
+       AC_SUBST(MAKEINFO_VERSION)
 ])dnl SXE_PROG_MAKEINFO