ax_prog_flex.m4: Merge upstream OpenBSD fixes.
authorVinson Lee <vlee@freedesktop.org>
Mon, 5 Jan 2015 22:53:03 +0000 (14:53 -0800)
committerVinson Lee <vlee@freedesktop.org>
Tue, 6 Jan 2015 23:06:54 +0000 (15:06 -0800)
commit5ae13051249f6f9d44dae15e9deb62e7cb09aed7
treee8cd945f66f20b18fd52abf702d3a10ecb1f0ea0
parenta8ef880a1b38cbcfc26e9f829338739d16cece99
ax_prog_flex.m4: Merge upstream OpenBSD fixes.

Merge the following upstream autoconf-archive patches.

ax_prog_flex: change grep syntax to accept e.g. "flex.real" in case a wrapper or symlink is used.
AX_PROG_FLEX: avoid use of grep empty string escape extension (fix for OpenBSD)
AX_PROG_FLEX: Also accept gflex.

Signed-off-by: Vinson Lee <vlee@freedesktop.org>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Jonathan Gray <jsg@openbsd.org>
m4/ax_prog_flex.m4