Re: [BUG]builtin echo error doing arguments parsing

[Peter Stephenson <p.stephenson@xxxxxxxxxxx>]

On Thu, 22 Feb 2018 09:37:11 +0000
Peter Stephenson <p.stephenson@xxxxxxxxxxx> wrote:
> On Wed, 21 Feb 2018 23:23:09 -0800
> wumingxwk@xxxxxxxxx wrote:
> > if there is only a '-' as argument，builtin echo won't print it
>
> You might have thought it should at least be turned off in some or most
> of the emulation modes...

Would look something like this.  Probably a good idea if there aren't
subtleties?

pws

diff --git a/Doc/Zsh/builtins.yo b/Doc/Zsh/builtins.yo
index 6c7ec4b..098b989 100644
--- a/Doc/Zsh/builtins.yo
+++ b/Doc/Zsh/builtins.yo
@@ -61,7 +61,9 @@ arguments, but is otherwise ignored.  This is useful in cases where
 arguments to the command may begin with `tt(-)'.  For historical
 reasons, most builtin commands also recognize a single `tt(-)' in a
 separate word for this purpose; note that this is less standard and
-use of `tt(-)tt(-)' is recommended.
+use of `tt(-)tt(-)' is recommended.  Use of a single `tt(-)' to
+terminate option processing is turned off if the option
+tt(POSIX_BUILTINS) is set.
 
 startitem()
 prefix(-)
diff --git a/Doc/Zsh/options.yo b/Doc/Zsh/options.yo
index 25b3d57..5217e62 100644
--- a/Doc/Zsh/options.yo
+++ b/Doc/Zsh/options.yo
@@ -2183,6 +2183,9 @@ Furthermore, the tt(getopts) builtin behaves in a POSIX-compatible
 fashion in that the associated variable tt(OPTIND) is not made
 local to functions.
 
+In addition, a single dash (`tt(-)') does not cause the termination of option
+processing: a double dash (`tt(-)tt(-)') is required.
+
 Moreover, the warning and special exit code from
 tt([[ -o )var(non_existent_option)tt( ]]) are suppressed.
 )
diff --git a/Src/builtin.c b/Src/builtin.c
index fb59738..d2c6ec4 100644
--- a/Src/builtin.c
+++ b/Src/builtin.c
@@ -304,7 +304,8 @@ execbuiltin(LinkList args, LinkList assigns, Builtin bn)
 		if (!(flags & BINF_KEEPNUM) && idigit(arg[1]))
 		    break;
 		/* For cd and friends, a single dash is not an option. */
-		if ((flags & BINF_SKIPDASH) && !arg[1])
+		if (((flags & BINF_SKIPDASH) || isset(POSIXBUILTINS)) &&
+		    !arg[1])
 		    break;
 		if ((flags & BINF_DASHDASHVALID) && !strcmp(arg, "--")) {
 		    /*