Re: [PATCH 1 of 2] libc/eglibc: [OS X] Don't Use __block as a Name of an Argument

["Yann E. MORIN" <yann dot morin dot 1998 at free dot fr>]

Philip, All,

On Sat, Apr 13, 2013 at 07:48:08AM +0300, Philip Belemezov wrote:
> On 13.04.2013 00:51, Yann E. MORIN wrote:
> >On Tue, Mar 26, 2013 at 05:25:31PM +0200, Philip Belemezov wrote:
> >># HG changeset patch
> >># User Philip Belemezov <philip@belemezov.net>
> >># Date 1364300812 -7200
> >># Node ID fcdf7fc7fd1c00715c3d9651ff00d805ecfb8aa8
> >># Parent  0fc56e62cecf07e4cdaf866ee24d6893c4ade436
> >>libc/eglibc: [OS X] Don't Use __block as a Name of an Argument
> >>
> >>Apple's GCC defines __block as
> >>
> >>#define __block __attribute__((__blocks__(byref)))
> >>
> >>which causes compilation to fail (attribute cannot be applied to argument).
> >
> >I do not understand why this patch is needed at all: we're not building
> >(e)glibc with the Apple-patched native gcc, but with a plain gcc that we
> >just build ourselves in the process.
> >
> >Unless I missed something... Can you elaborate, please?
> 
> I don't have the details any more, but I believe this was happening during
> the bootstrap phase, before the target gcc has been built.

The only case where we may do something in (e)glibc without having a
target gcc is to install the libc headers when using LinuxThreads, which
have not be supported in (e)glibc for some time (some years, now).

In all other cases, building anything libc involves having a target gcc
first.

The only reason we'd use the native compiler (and hence your
Apple-severed version of gcc) would be if (e)glibc needed to build a
program that runs on your build machine, and I am not aware of such a
case ( but I am sometimes easily proven wrong! ;-) )

> Let me reproduce the failure and see where exactly it choke.

Thank you for investigating! :-)

Regards,
Yann E. MORIN.

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