Re: [patch #8186] ax_pthread adds -pthread when it should not on OSX when compiling with clang

[Peter Johansson]

On 09/22/2013 02:36 AM, Daniel Richard G. wrote:
> Follow-up Comment #3, patch #8186 (project autoconf-archive):
>
> I haven't worked with Clang yet, but from a bit of searching around, it seems
> that -pthread will either cause the compiler to complain harmlessly, or be
> recognized as a proper option in newer versions.

Hi,

I noticed that gnulib adds '-Werror -Wunknown-warning-option' to CFLAGS 
when Clang is in use, before trying to detect whether an option is OK or 
not. Perhaps that approach would be useful here too.

http://git.savannah.gnu.org/gitweb/?p=gnulib.git;a=blob;f=m4/warnings.m4;h=e3d239b64ffbc737d4f6ce993355c477a4884925;hb=HEAD

Cheers,
Peter


> What's the specific failure mode that the patch intends to avoid? Is it a hard
> error? Warning noise? It would be helpful to see some copy-and-pasted messages
> from the compiler.
>
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--
Peter Johansson