Re: thread model for mxe-octave build

[John Donoghue]

On 02/24/2018 10:52 AM, John W. Eaton wrote:
> On 02/23/2018 10:08 AM, John W. Eaton wrote:
> > On 02/23/2018 09:57 AM, JohnD wrote:
> >
> > > Not sure what part of the gcc install that is, but the mxe version 
> > > of gcc.mk compiles posix threads as part of gcc.mk, before building 
> > > the 'rest of gcc'
> > >
> > > And then all their pthreads.mk does is install a package config file 
> > > for it
> >
> > Ah, OK, thanks.  I'll take a look at that and see if I can adapt it 
> > to the build-gcc.mk file in mxe-octave.
>
> I looked at the current MXE it allows building a cross compiler for 
> Windows with posix threads and the build seems to work.  So I tried to 
> adapt their rules to mxe-octave.  I pushed changeset to provide a 
> macro for unpacking and patching an archive, then I tried the attached 
> diffs for src/build-gcc.mk and building that is failing with a series 
> for messages like this when linking libgcc_s.a:
>
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/x86_64-w64-mingw32/lib/libpthread.dll.a when searching for 
> -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/mingw/lib/libpthread.dll.a when searching for -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/x86_64-w64-mingw32/lib/libpthread.dll.a when searching for 
> -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/mingw/lib/libpthread.dll.a when searching for -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/x86_64-w64-mingw32/lib/libpthread.dll.a when searching for 
> -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/mingw/lib/libpthread.dll.a when searching for -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/x86_64-w64-mingw32/lib/libpthread.dll.a when searching for 
> -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: skipping incompatible 
> DIR/usr/mingw/lib/libpthread.dll.a when searching for -lpthread
> DIR/usr/bin/x86_64-w64-mingw32-ld: cannot find -lpthread
>
> I'm not sure whether this is due to multilib or that we are creating 
> links like
>
>   usr/mingw -> DIR/usr/x86_64-w64-mingw32
>
> when building.  It seems we have built up a lot of special cases of 
> creating directories (lib, lib3, lib64) and links that may no longer 
> be valid?
>
> jwe

My bet will be on multilib issues being the cause, I remember it was a 
pain initially get it to work.


As an aside, I think you only reason we needed multilib was so that we 
could also compile nsis in when doing win64.

Not sure if that is still a limitation with newer versions.


If I get a chance I will take a look at gcc and nsis as well.