[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: Problems with echo. (echo period)
From: |
Eli Zaretskii |
Subject: |
Re: Problems with echo. (echo period) |
Date: |
Tue, 24 Apr 2007 00:59:23 +0300 |
> Date: Mon, 23 Apr 2007 07:20:53 -0700 (PDT)
> From: Aaron Shatters <address@hidden>
> Cc: address@hidden
>
> >I remain unconvinced that we should ``fix'' this just because this
> >fundamental incompatibility between shells sometimes causes trouble in
> >Makefiles that assume Posix `echo' where it isn't guaranteed to exist.
>
> The problem is that Make is *not* invoking the shell built-in
I was talking about the situation where `echo' is called with an empty
command line. In that case, the shell does get called.
As for the "echo." case, it's just a bizarre consequence of cmd
command-line parsing (there are many more manifestations of that, and
others have pointed out some of them). I don't think there's a very
large demand for supporting that in Make, and even if there is, I
don't plan on working on that any time soon.
> I am confused as to what level of support Make is trying to achieve. There
> are !unixy_shell conditions and dos cmd references all over the code. What
> are the purposes of these if not to handle "fundamental incompatibilities
> between shells". I don't understand where the point of disagreement is. I
> understand that this is not a bug in Make, but, in my opinion, this is a
> perfectly reasonable enhancement. Make knows about the existence of the
> windows shell 'cmd.exe'. It knows what the shell built-ins are, and it
> already handles this shell specially (for example, sh_cmds_dos in job.c).
> What reasoning is there for excluding this functionality, when all of the
> other specifics associated with this shell are handled?
My reasoning is that supporting such weirdo parsing is a maintenance
burden. The way Make parses the commands now cannot be easily
modified to cater to these strange corners in cmd.
You can always say `cmd /c "echo."', or use some special character,
such as redirection or pipe, if you need to force Make to call the
shell.
- RE: Problems with echo. (echo period), (continued)
- RE: Problems with echo. (echo period), Dave Korn, 2007/04/23
- Re: Problems with echo. (echo period), Christopher Faylor, 2007/04/23
- RE: Problems with echo. (echo period), Dave Korn, 2007/04/23
- RE: Problems with echo. (echo period), Keith Huntington, 2007/04/23
- Re: Problems with echo. (echo period), Greg Chicares, 2007/04/23
- Re: Problems with echo. (echo period), Eli Zaretskii, 2007/04/23
- RE: Problems with echo. (echo period), Dave Korn, 2007/04/23
- Re: Problems with echo. (echo period), Eli Zaretskii, 2007/04/24
Re: Problems with echo. (echo period), Eli Zaretskii, 2007/04/21
Re: Problems with echo. (echo period), Aaron Shatters, 2007/04/23
- Re: Problems with echo. (echo period),
Eli Zaretskii <=
Re: Problems with echo. (echo period), Aaron Shatters, 2007/04/23
- Re: Problems with echo. (echo period), Eli Zaretskii, 2007/04/24
- Re: Problems with echo. (echo period), Benoit Sigoure, 2007/04/24
- RE: Problems with echo. (echo period), Dave Korn, 2007/04/24
- RE: Problems with echo. (echo period), Benoit Sigoure, 2007/04/24
- RE: Problems with echo. (echo period), Dave Korn, 2007/04/24
- Re: Problems with echo. (echo period), Christopher Faylor, 2007/04/24
- RE: Problems with echo. (echo period), Dave Korn, 2007/04/24
Re: Problems with echo. (echo period), Eli Zaretskii, 2007/04/24
RE: Problems with echo. (echo period), Earnie Boyd, 2007/04/24