Re: [PATCH] gold: Use autotools pthread macro

[Cary Coutant <ccoutant at gmail dot com>]

> The autotools library macro (AX_PTHREAD) is now used to detect if
> pthreads is present and multi-threaded linking in gold is automatically
> enabled if it is found. This enables multi-threaded gold on platforms
> where pthreads is enabled via other methods than just -lpthread (e.g.
> MinGW)
>
> Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
> ---
>  config/ax_pthread.m4       | 485 ++++++++++++++++++++++++++++
>  gold/Makefile.am           |  11 +-
>  gold/Makefile.in           |  22 +-
>  gold/aclocal.m4            |   1 +
>  gold/configure             | 767 +++++++++++++++++++++++++++++++++++++++++++--
>  gold/configure.ac          |  23 +-
>  gold/testsuite/Makefile.in |   8 +-
>  7 files changed, 1254 insertions(+), 63 deletions(-)

Thanks for the patch! I have a few preliminary questions and comments...

First, do you or your company have a copyright assignment on file with FSF?

I could be wrong, but I believe adding to config/ will require
approval from a GCC config/ maintainer. The normal process, as I
understand it, would be to add the file to the GCC tree, then sync it
into the binutils tree. I'm not in a position to approve that, nor can
I judge on the acceptability of the copyright notice in that file.

I'd like to retain the ability to use --disable-threads as a configure option.

If this is just to get MinGW on board, is there a lighter-weight way
of doing that? Could we just add a configure option that switches
between -lpthread and -pthread (or whatever option is needed)? I like
the idea of fully automating it, but that's a pretty big m4 file!

Anyway, I'd like to hear what the GCC folks think of adding
ax_pthread.m4 to the config/ directory.

(BTW, In the future, please omit diffs from generated files from your patch.)

-cary