Commit 5ae13051 authored by Vinson Lee's avatar Vinson Lee

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's avatarVinson Lee <>
Reviewed-by: Matt Turner's avatarMatt Turner <>
Reviewed-by: default avatarJonathan Gray <>
parent a8ef880a
......@@ -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_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"],
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