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-rwxr-xr-xbuildconf4
1 files changed, 2 insertions, 2 deletions
diff --git a/buildconf b/buildconf
index 0d998c2bf..940559652 100755
--- a/buildconf
+++ b/buildconf
@@ -6,7 +6,7 @@
# | (__| |_| | _ <| |___
# \___|\___/|_| \_\_____|
#
-# Copyright (C) 1998 - 2014, Daniel Stenberg, <daniel@haxx.se>, et al.
+# Copyright (C) 1998 - 2017, Daniel Stenberg, <daniel@haxx.se>, et al.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
@@ -255,7 +255,7 @@ echo "buildconf: libtoolize version $lt_version (ok)"
#--------------------------------------------------------------------------
# m4 check
#
-m4=`(${M4:-m4} --version || ${M4:-gm4} --version) 2>/dev/null | head -n 1`;
+m4=`(${M4:-m4} --version 0<&- || ${M4:-gm4} --version) 2>/dev/null 0<&- | head -n 1`;
m4_version=`echo $m4 | sed -e 's/^.* \([0-9]\)/\1/' -e 's/[a-z]* *$//'`
if { echo $m4 | grep "GNU" >/dev/null 2>&1; } then