Re: Compiling ATLAS with MinGW

[Michael Goffioul]

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).

Michael.