m4: Use older autoconf 2.63 compatible ax_check_compile_flag.
authorVinson Lee <vlee@freedesktop.org>
Thu, 31 Aug 2017 22:38:57 +0000 (15:38 -0700)
committerVinson Lee <vlee@freedesktop.org>
Fri, 1 Sep 2017 23:30:40 +0000 (16:30 -0700)
commit39a69f0692722e05a221b1db4cfd8100f2f20684
treee59a708613cae4624d40fa5b8fc1abc440fd9556
parent01f29366e3c764c6f5cf8721233280bec52a775e
m4: Use older autoconf 2.63 compatible ax_check_compile_flag.

CentOS 6 and RHEL 6 have autoconf 2.63.

Fixes: e4b2b69e828c ("configure: Add and use AX_CHECK_COMPILE_FLAG")
Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
m4/ax_check_compile_flag.m4