Adding support for mingw-w64 and winpthread

[Vincent R via D.gnu]

On Friday, 25 March 2016 at 10:11:46 UTC, Johannes Pfau wrote:
> Am Fri, 25 Mar 2016 09:15:06 +0000
> schrieb Vincent R <lol at dlang.org>:
>
>> > So the main question is: can we simply ditch gcc.gthreads 
>> > and inline the code into rt.monitor?
>> 
>> Thanks for all this information and it seems your knowledge is
>> far beyond mine so I cannot answer your last question but from
>> what you explain maybe it could be a better option.
>> What I can tel you for now is your patch works and allowed me 
>> to
>> generate a gdc compilier.
>> Now I let you decide what is the best option.
>
> Great! We've simply removed gthreads now: 
> https://github.com/D-Programming-GDC/GDC/commit/096991b5817ac21ff6c81ea3759ad4a253deff59
>
> It might take a few days till this is merged into the gdc-X 
> branches though.
>
>
> BTW: When I tested MinGW I found a serious garbage collector 
> bug: TLS variables are currently not scanned correctly. This 
> means if you have GC objects only referenced from thread local 
> memory these might get collected.
>
> I know how to fix this but it's not simple so it will take some 
> time. If you run into this bug you could use DMD or LDC instead 
> (IIRC you ran into an optlink bug when using DMD, but you could 
> probably use the -mscoff32 or m64 options to avoid optlink).

I have some linker errors when I try to use the gdc compiler :

Start a mingw64 shell, remove wxwidgets3 if installed, generate 
wxwidgets28 and installs it:

$ pacman -R wxwidgets
$ export MINGW_INSTALLS=mingw64
$ git clone https://github.com/vrichomme/MINGW-packages.git
$ cd mingw-w64-wxwidgets28
$ makepkg-mingw -sLf
$ pacman -U mingw-w64-x86_64-wxWidgets-2.8.12-1-any.pkg.tar.xz

$ git clone https://github.com/vrichomme/wxd.git
$ cd src
$ make
$ $ cd Samples/
$ make
make -C Controls
make[1]: Entering directory 
'/home/19013692/tmp/wxd/src/Samples/Controls'
make[1]: Nothing to be done for 'all'.
make[1]: Leaving directory 
'/home/19013692/tmp/wxd/src/Samples/Controls'
make -C Dialogs
make[1]: Entering directory 
'/home/19013692/tmp/wxd/src/Samples/Dialogs'
gdc -o ../../bin/Dialogs Dialogs.o -L../.. -lwxd  -lwxc 
`wx-config --libs` -lstdc++ -lws2_32 -lwsock32
C:/DEV/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/5.3.0/libgphobos2.a(socket.o): In function `_D3std6socket8Protocol17getProtocolByNameMFxAaZb':
C:\DEV\msys64\home\19013692\tmp2\MINGW-packages\mingw-w64-gcc\src\build-x86_64-w64-mingw32\x86_64-w64-mingw32\libphobos\src/../../../../gcc-5.3.0/libphobos/src/std/socket.d:461: undefined reference to `getprotobyname'
C:/DEV/msys64/mingw64/lib/gcc/x86_64-w64-mingw32/5.3.0/libgphobos2.a(socket.o): In function `_D3std6socket8Protocol17getProtocolByTypeMFE3std6socket12ProtocolTypeZb':
C:\DEV\msys64\home\19013692\tmp2\MINGW-packages\mingw-w64-gcc\src\build-x86_64-w64-mingw32\x86_64-w64-mingw32\libphobos\src/../../../../gcc-5.3.0/libphobos/src/std/socket.d:474: undefined reference to `getprotobynumber'
...

As you can see all the missing symbols are from the socket 
library and that's why I have added locally -lws2_32 -lwsock32 to 
the config.gcc but it doesn't solve the problem...