Tatsuro MATSUOKA wrote:
> Hello Benjamin
>
> This is essentially the ATLAS issue but you have already solved this problem.
>
> I have been so far used the ATLAS libraries built using the cygwin GCC-4 and used the libf77blas.a and
> libatlas.a. This might be illegal because the cygwin complier is not compatible to Mingw one.
> However no problem has been occurred in octave 3.0.x.
I wouldn't term it illegal and I think that the cygwin compiler is
indeed compatible here, since you create a static library i.e. only
object code. So you have to just make sure to use the same gcc version,
since sytem libraries may be incompatible across different versions.
>
> I have tried the same procedure on the octave 3.2.0, configure script reject to use the libf77blas.a
> and libatlas.a generated by cygwin GCC-4.
>
Does it?
I seem to have no problems here.
What is the error message?
> I have tried to build atlas libraries -Si nocygwin 1.
> However gcc-mingw on cygwin is still GCC-3.4.4 so that we cannot use for Mingw GCC-4 because gfortran
> is not compatible to g77.
True, but I think I saw that there is a native gcc-4 available for
cygwin installable via cygwin's setup.exe. I believe it's also a 4.3.x
version.
>
> To solve this, one has to use native GCC-4 Mingw compiler for ATLAS build on cygwin.
>
> I have tried this but I cannot solved to translate cygwin path to windows path.
>
> It will be grateful for me if you will give some suggestions to me.
>
Here is what I did.
I built myself a native cygwin gcc of version 4.3.0 and used it to build
atlas.
The creation of the shared libraries I do with the native mingw gcc.
Building a cygwin gcc is straightforward,
1) download gcc-core-4.3.0.tar.bz2 and gcc-fortran-4.3.0.tar.bz2
2) configure and set a useful prefix to have a seprarate installation
tree, and configure for gcc and gfortran only (that's all you need for
atlas)
3) make && make install
Have a look at the attached quick-and-dirty script I used
This worked for me so far.
What's not considered here yet is a multi-threaded build.
benjamin
#!/usr/bin/sh
BUILDDIR=.build_cygwin_gcc-3.3.3
TOPDIR=`pwd`
SRCDIR=gcc-4.3.0
unpack()
{
tar xjvf gcc-core-4.3.0.tar.bz2
tar xjvf gcc-fortran-4.3.0.tar.bz2
}
mkdirs()
{
rm -rf $BUILDDIR
mkdir $BUILDDIR
}
conf()
{
cd $BUILDDIR && ${TOPDIR}/${SRCDIR}/configure --srcdir=${TOPDIR}/${SRCDIR} \
--prefix=/opt/gcc-4.3.0 \
--with-cpu=i686 \
--enable-languages=c,fortran \
--enable-version-specific-runtime-libs \
--disable-shared \
--disable-nls
}
build()
{
cd $BUILDDIR && make
}
install()
{
cd $BUILDDIR && make install
}
$*
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