Re: thread model for mxe-octave build

[Daniel J Sebald]

On 02/22/2018 10:43 AM, John W. Eaton wrote:
> I had someone ask why C++11 threads (mutext, condition_variable_any) 
> wasn't working with .oct files built with Octave 4.2.1.  After a little 
> searching, I found that we are configuring GCC with 
> --enable-threads=win32 instead of --enable-threads=posix.  Apparently 
> the latter is required to enable C++11 thread features.  Is there any 
> reason to not use --enable-threads=posix by default in our builds?  I 
> tried building native-gcc with this option and it allowed my test 
> program to compile but I don't know whether there might be other 
> problems.  From what I hve read, it seems that even if GCC is built with 
> this option you can still use Windows threading features directly.  I've 
> seen some mention of performance issues "in some situations" but no 
> explanation of what that might be.

What platforms are you referring to?  Windows build?  Linux build?  All? 
 On Linux I'm seeing --enable-threads=posix after configuration.  After 
bootstrap, the ./configure script indicates

gl_fnmatch_required=POSIX
gl_getopt_required=POSIX

Maybe that has an influence.

Dan