Re: Compiling ATLAS with MinGW

[Tatsuro MATSUOKA]

Hello


--- On Sun, 2012/2/19, Michael Goffioul wrote:

> On Sun, Feb 19, 2012 at 12:03 AM, Michael Goffioul
> <address@hidden> wrote:
> > On Sat, Feb 18, 2012 at 11:08 PM, Tatsuro MATSUOKA
> > <address@hidden> wrote:
> >> Hello
> >>
> >> I have complied the ATLAS self-build GCC on Cygwin compiler (gcc-4.5.3).
> >> From the libatlats.a and liff77blas.a, I have create libblas.dll.a and 
> >> libblas.dll using MinGW GCC as linker.
> >>
> >> This ATLAS can be linked with Octave on MinGW.
> >>
> >> The reason why I use self build GCC on cygwin, I have not create 
> >> libblas.dll.a and libblas.dll with MinGW linker from libatlats.a and 
> >> libff77blas.a built with the GCC bundled with Cygwin.
> >
> > Thanks Tatsuro. So you're basically doing the same as me. The reason
> > I'm asking is that I've been trying to recompile ATLAS with
> > multi-thread support, but went into problems. The multi-threaded ATLAS
> > version is compiled against pthread library. However when applying the
> > same method as above, you're using cygwin-GCC to compile ATLAS; hence
> > you're using the cygwin version of pthread headers. At link stage,
> > you're using MinGW-GCC and link against the MinGW version of pthread
> > library (which is basically this one:
> > http://sourceware.org/pthreads-win32/).
> >
> > But the catch is that the pthread types in the cywin version and MinGW
> > version are not the same, especially they don't have the same size. In
> > other words: sizeof(pthread_t) in cygwin is not the same as
> > sizeof(pthread_t) in MinGW. And you end up with stack corruption.
> >
> > I tried to compile ATLAS with the mingw-xxx compilers that are
> > available in cygwin, but teh build process stops almost immediately
> > with an error (ERROR 435 DURING Stage 1 install).
> 
> Actually, it seems to work fine when I keep the XCC compiler to be
> cygwin-GCC. I'll give that a shot when I get some time.
> 
> Michael.
>


Thank you for your information.  As you described I could not build 
multi-threaded atlas because of pthread issue.  I hope that your trial will be 
successful.

Regards

Tatsuro