buildconf: fix hang on IRIX

Apparently, /usr/bin/m4 ignores the --version parameter and waits for
input from stdin.

Fixes #1471
This commit is contained in:
canavan at github 2017-05-07 00:06:56 +02:00 committed by Daniel Stenberg
parent 289236b223
commit 6c7f1f741b

View File

@ -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