Re: add command line option to gcc
On Fri, 6 Sep 2019 at 04:26, Tim Rice wrote:
>
>
> I have a use case where I would like gcc to accept -Kthread
> and act as if it was passed -pthread. So -Kthread would
> be a synonym for -pthread.
For a specific target, or universally?
> I am having trouble figuring out how the option processing is handled.
> Possibly in gcc/gcc.c but I am stumped here.
You could use "specs" to tell the driver to use -pthread when -Kthread
is given e.g.
%{Kthread: -pthread}
This can either be hardcoded into the 'gcc' driver program (which
would be done in gcc/gcc.c or in a per-target file under gcc/config)
or provided in a specs file with the -specs option (see the manual).
The quick and dirty way to test that would be to dump the current
specs to a file with 'gcc -dumpspecs > kthread.spec' and then edit the
file so that everywhere you see %{pthread: xxx} you add %{Kthread:
xxx} to make it do the same thing. Then you can run gcc
-specs=kthread.spec -Kthread ...
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Re: [PATCH] Deprecate -frepo option.
On Fri, Sep 06, 2019 at 08:58:48AM +0200, Martin Liška wrote: > Ok, hopefully nobody is strongly against. I've just retested the > patch and installed it as r275450. --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -1763,8 +1763,8 @@ ObjC ObjC++ LTO Var(flag_replace_objc_classes) Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime. frepo -C++ ObjC++ -Enable automatic template instantiation. +C++ ObjC++ Deprecated +Deprecated in GCC 10. This switch has no effect. But it's not just deprecated, it's removed now, so shouldn't this be Ignored? Also, https://gcc.gnu.org/gcc-10/changes.html should be updated, both in Caveats and the C++ section. But I can do that. Marek
Re: [PATCH] Deprecate -frepo option.
On Fri, Sep 06, 2019 at 10:48:53AM -0400, Marek Polacek wrote: > On Fri, Sep 06, 2019 at 08:58:48AM +0200, Martin Liška wrote: > > Ok, hopefully nobody is strongly against. I've just retested the > > patch and installed it as r275450. > > --- a/gcc/c-family/c.opt > +++ b/gcc/c-family/c.opt > @@ -1763,8 +1763,8 @@ ObjC ObjC++ LTO Var(flag_replace_objc_classes) > Used in Fix-and-Continue mode to indicate that object files may be swapped > in at runtime. > > frepo > -C++ ObjC++ > -Enable automatic template instantiation. > +C++ ObjC++ Deprecated > +Deprecated in GCC 10. This switch has no effect. The Deprecated keyword is just misnamed, I believe it does the same thing as Ignore, except that it also prints a warning that the switch is no longer supported, so kind like Ignore Warn(switch %<-frepo%> is no longer supported). The description should be just This switch has no effect. or Does nothing. Preserved for backward compatibility. Jakub
Re: [PATCH] Deprecate -frepo option.
On 9/6/19 4:56 PM, Jakub Jelinek wrote: On Fri, Sep 06, 2019 at 10:48:53AM -0400, Marek Polacek wrote: On Fri, Sep 06, 2019 at 08:58:48AM +0200, Martin Liška wrote: Ok, hopefully nobody is strongly against. I've just retested the patch and installed it as r275450. --- a/gcc/c-family/c.opt +++ b/gcc/c-family/c.opt @@ -1763,8 +1763,8 @@ ObjC ObjC++ LTO Var(flag_replace_objc_classes) Used in Fix-and-Continue mode to indicate that object files may be swapped in at runtime. frepo -C++ ObjC++ -Enable automatic template instantiation. +C++ ObjC++ Deprecated +Deprecated in GCC 10. This switch has no effect. The Deprecated keyword is just misnamed, I believe it does the same thing as Ignore, except that it also prints a warning that the switch is no longer supported, so kind like Ignore Warn(switch %<-frepo%> is no longer supported). Exactly. I'll double check it. The description should be just This switch has no effect. or Does nothing. Preserved for backward compatibility. Yep, I'll update the comment. @Marek: Also, https://gcc.gnu.org/gcc-10/changes.html should be updated, both in Caveats and the C++ section. But I can do that. I'll do it once we'll be close to release of GCC 10. I've got quite some changes that I haven't mentioned in yet in changes or porting_to. Martin Jakub
Re: add command line option to gcc
On Fri, 6 Sep 2019, Jonathan Wakely wrote:
> On Fri, 6 Sep 2019 at 04:26, Tim Rice wrote:
> >
> >
> > I have a use case where I would like gcc to accept -Kthread
> > and act as if it was passed -pthread. So -Kthread would
> > be a synonym for -pthread.
>
> For a specific target, or universally?
Likely only useful for UnixWare (and OpenServer 6).
>
> > I am having trouble figuring out how the option processing is handled.
> > Possibly in gcc/gcc.c but I am stumped here.
>
> You could use "specs" to tell the driver to use -pthread when -Kthread
> is given e.g.
>
> %{Kthread: -pthread}
>
> This can either be hardcoded into the 'gcc' driver program (which
> would be done in gcc/gcc.c or in a per-target file under gcc/config)
> or provided in a specs file with the -specs option (see the manual).
Ok, I'll go down this path and see how it works out.
Thanks.
> The quick and dirty way to test that would be to dump the current
> specs to a file with 'gcc -dumpspecs > kthread.spec' and then edit the
> file so that everywhere you see %{pthread: xxx} you add %{Kthread:
> xxx} to make it do the same thing. Then you can run gcc
> -specs=kthread.spec -Kthread ...
>
--
Tim RiceMultitalents(707) 456-1146
t...@multitalents.net
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