build: use portable Makefile variables
authorA. Gordon <assafgordon@gmail.com>
Mon, 15 Sep 2014 19:51:50 +0000 (15:51 -0400)
committerRichard W.M. Jones <rjones@redhat.com>
Mon, 31 Oct 2016 10:16:26 +0000 (06:16 -0400)
commit638e405abce7705b7fc9e08f7787a38ab7b8d7b7
treefd06cf5edcb1406477c34ac7a080d20bee17be4c
parent91eb213e9d0be8b6c0fa3568331b8fa953b3299f
build: use portable Makefile variables

* Makefile.am: use '$?' instead of '$<'
  $< in a non-inference rule is a GNU-make extension, which fails with
  BSD make.

(cherry picked from commit 243928da395080d7895111d5e5c0f1ff5f9e95fb)
Makefile.am