Originally posted by: Teej42

OpenBLAS continues to be a problem for me.  Is there any known RPM that works for AIX 7.1 for BLAS and LAPACK that we could install?

Originally posted by: AyappanP

R package provides it's own BLAS and LAPACK library. Install R & R-devel package and check.

The headers can be found at "/opt/freeware/lib/R/include" (lib64 for 64bit)

Originally posted by: Teej42

That is helpful, however, a couple of caveats:

1.  The shared object files are named with libR instead of lib.  Those files are also installed in /opt/freeware/lib/R/lib.  Symbolic links entitled liblapack.so and libblas.so needs to be created in /opt/freeware/lib to reference this.

2.  The include files does not include cblas.h, only BLAS.h within /opt/freeware/lib/R/include/R_ext/.  Symbolic links entitled cblas.h and lapack.h needs to be created in /opt/freeware/include to reference both BLAS.h and Lapack.h.  

With both modifications, SciPy (python -m pip install scipy) is still failing, but at a much further point.  If I am unable to resolve, I will open a new thread.  Thank you.

Originally posted by: Teej42

Upon further investigation, it was wrong on my part to assume that R have Lapack/BLAS complete version.  What was provided is blas, not cblas.  SciPy requires cblas and its associated library files.  librblas.so does not contains these C-based dependencies.

So once again, is there a package available that provide a GCC version of Lapack/BLAS, preferably by itself, NOT included in any other packages?  

Originally posted by: AyappanP

It seems like your requirement is to install scipy. I tried it myself. 

With some hacks i am able to install scipy.

One can build this lapack source ( http://www.netlib.org/lapack/ ) easily in AIX. You just need gcc-gfortran rpm installed

Extract source and copy make.inc.example as make.inc followed by "make"

After build , copy three libraries (liblapack.a , librefblas.a, libtmglib.a ) to /opt/freeware/lib. Rename librefblas.a as libblas.a

Apply this patch in scipy source 

--- scipy/special/cephes/dd_real.h_orig 2018-10-10 19:53:10 +0000
+++ scipy/special/cephes/dd_real.h      2018-10-10 11:41:59 +0000
@@ -105,7 +105,7 @@
 extern const double2 DD_C_ZERO;
 extern const double2 DD_C_ONE;

-#if defined(__STDC__) && defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && defined(NAN)
+#if defined(__STDC__) && defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901L) && defined(NAN) && !(defined(_AIX))
 #define DD_C_NAN_IS_CONST
 extern const double2 DD_C_NAN;
 extern const double2 DD_C_INF;

Finally run

LDFLAGS="-lpthread" python setup.py install

Originally posted by: Teej42

It threw:

close failed in file object destructor:
sys.excepthook is missing
lost sys.stderr

Attached is the log of this effort.  Please advise.

Attachment(s)

Install_SciPy.txt   304 KB 1 version

Originally posted by: AyappanP

This issue is fixed in the latest python release. Please update your python to the latest ie., python-2.7.15-2

Originally posted by: Teej42

That appears to resolve the issues.  We have not yet tried SciPy's functionalities, but the packages are now installed successfully.

Thank you for the help you provided!  I will take some time today to report to the SciPy dev team to make this particular adjustment, unless you wish to do this?