[openssl-dev] [openssl-team] Discussion: design issue: async and -lpthread

[Kurt Roeckx]

On Wed, Nov 25, 2015 at 01:02:29PM +0100, Florian Weimer wrote:
> On 11/23/2015 11:08 PM, Kurt Roeckx wrote:
> 
> > I think that we currently don't do any compile / link test to
> > detect features but that we instead explicitly say so for each
> > platform.
> > 
> > Anyway, the gcc the documentation is here:
> > https://gcc.gnu.org/onlinedocs/gcc/Thread-Local.html
> > 
> > TLS support clearly isn't supported everywhere.
> 
> The most portable approach is to switch C++11, which provides you
> thread-local variables with destructors (and you also get portable
> atomics).  There are simply no standards-based C solutions as long as
> you have to support the Microsoft compiler under Windows.

Please note that we use C, not C++.  But C11 has the same atomics
extentions as C++11.

We're also currently still targetting C89/C90 (with some minor
extentions), but I think we should try to use them if the platform
supports it.


Kurt