Re: thread model for mxe-octave build

[John W. Eaton]

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

diffs.txt
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