Re: [Boost-users] thread no defined - issue

10 Sep 2016

      Le 10/09/2016 à 10:39, "Alexander Carôt" a écrit :
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# For the library variant that is not native on the build platform
# an additional tag is applied:
# boost_thread_pthread for the pthread variant on windows, and
# boost_thread_win32 for the win32 variant (likely when built on cygwin).
#
# To request the pthread variant on windows, from boost root you would
# say e.g:
# bjam msvc-8.0 --with-thread install threadapi=pthread
How have you built boost and how your user has build boost?
Which compile time flags are you using in your application and which is
using your user?
Are you defining BOOST_THREAD_POSIX
No, not at all: I am neither compiling boost with additional flags nor am I defining anything in my sources.
The user simply runs a binary, which tells that threads are not available and hence does not work at all.
So - maybe this is where the problem starts: Should I explicitely compile boost with thread-support (or even pthread-support) ?
Compile it using
bjam <your compiler> --with-thread install threadapi=pthread

and define in your application

BOOST_THREAD_POSIX if you don't use bham.

Let me know how it works?
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You can start by following the  Windows specific bugs (or whatever bug
as well) and pushing some PR for them. Once I have an idea of what kind
of work you can do, I can request to give you the needed rights to
commit your self any change and become a co-maintainer.
Perfect - right now I cannot estimate the time I have to work on it so this is a good way to figure it out.
Great.
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Best
Alex
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Gesendet: Dienstag, 06. September 2016 um 19:00 Uhr
Von: "Vicente J. Botet Escriba" 
An: boost-users@lists.boost.org
Betreff: Re: [Boost-users] thread no defined - issue
Le 06/09/2016 à 01:40, Gavin Lambert a écrit :
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one single (windows) user in my project community
(http://www.soundjack.eu) has the following problem:
#ifndef BOOST_THREAD_DEFINES_THREAD_ATTRIBUTES_NATIVE_HANDLE
          cout << "THREAD IS NOT DEFINED" << endl;
#endif
This statement is true but only for him – on any other machine (Win,
Linux and OSX) is works fine.
I haven't tried checking older versions of Boost to see if it's
different, but AFAICT in 1.60 this symbol is only defined when using
On 6/09/2016 07:14, Alexander Carôt wrote:
pthreads, which would not normally be the case on Windows unless
you're using Cygwin (or possibly mingw).
They could try defining BOOST_THREAD_POSIX to force use of pthreads if
you require this for some reason, but this would have to be defined
when compiling Boost itself, any libraries that use Boost, and for the
application.
If at all possible you should make your code work with both pthreads
and Win32 threads.
AFAIK Boost.Thread don't use the pthread API on Windows. This will imply
a lot of changes that I can not test now as I don't have a Windows machine.
If some one can spend some time trying to create a port to
Win/cygwin/... I'll be open to take in account the patch.
Best,
Vicente
P.S. I will need an experimented Windows guy that help me as
co-maintainer for the Windows platform.
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