Could I use regular match in AT_CHECK? Like this: m4_define([OVS_VSWITCHD_STOP], > [AT_CHECK([/etc/init.d/openvswitch stop], [0], [stdout], []) > AT_CHECK([[awk '/Killing ovsdb-server/' stdout | sed -e 's/[ ]*$//g']], > [0], [Killing ovsdb-server ([0-9]*) > ]) > ]) 2017-08-10 21:40 GMT+08:00 Eric Blake <eblake@xxxxxxxxxx>: > On 08/09/2017 09:56 PM, Sam wrote: > > Yes, it's because a space at the end of line: > > > > --- -^I2017-08-10 10:51:06.097868811 +0800$ > >> +++ > > > but in my match, I add a space, I don't know why it doesn't work. > > > > AT_CHECK([[awk '/ACTIVE/' stdout | head -4]], [0], [LACP actor_state > ACTIVE > >> AGGREGATION SYNC COLLECTING DISTRIBUTING $ > >> partner_state ACTIVE AGGREGATION SYNC COLLECTING DISTRIBUTING $ > >> LACP actor_state ACTIVE AGGREGATION SYNC COLLECTING DISTRIBUTING $ > >> partner_state ACTIVE AGGREGATION SYNC COLLECTING DISTRIBUTING $ > >> ])$ > > Because autoconf eats trailing spaces by default (it's a feature). You > can work around it by TELLING autoconf that you intend for there to be > trailing space: > > AT_CHECK(..., [[trailing space preserved here: @&t@ > but not here > more text]]) > > The @&t@ quadrigraph (mnemonic 'and-t' sounds similar to 'empty') > expands to nothing, but is converted after the point when trailing > whitespace is eaten. > > The manual documents this: > https://www.gnu.org/software/autoconf/manual/autoconf.html#Quadrigraphs > > -- > Eric Blake, Principal Software Engineer > Red Hat, Inc. +1-919-301-3266 > Virtualization: qemu.org | libvirt.org > > _______________________________________________ Autoconf mailing list Autoconf@xxxxxxx https://lists.gnu.org/mailman/listinfo/autoconf
