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ax_prog_flex.m4: Merge upstream OpenBSD fixes.

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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>
This commit is contained in:
Vinson Lee
2015-01-05 14:53:03 -08:00
parent a8ef880a1b
commit 5ae1305124
1 changed files with 2 additions and 2 deletions
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m4/ax_prog_flex.m4
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@@ -42,7 +42,7 @@
# modified version of the Autoconf Macro, you may extend this special
# exception to the GPL to apply to your modified version as well.
#serial 9
#serial 12
# mattst88:
# Replaced m4_ifnblank(...) with m4_ifval(m4_normalize(...), ...)
@@ -53,7 +53,7 @@ AC_DEFUN([AX_PROG_FLEX], [
AC_REQUIRE([AC_PROG_EGREP])
AC_CACHE_CHECK([if flex is the lexer generator],[ax_cv_prog_flex],[
AS_IF([$LEX --version 2>/dev/null | $EGREP -q '^\<flex\>'],
AS_IF([$LEX --version 2>/dev/null | $EGREP -qw '^g?flex'],
[ax_cv_prog_flex=yes], [ax_cv_prog_flex=no])
])
AS_IF([test "$ax_cv_prog_flex" = "yes"],