From a8e884d34ece9f704fd2edee4c197503ca9d79c7 Mon Sep 17 00:00:00 2001
From: Ray Speth <speth@mit.edu>
Date: Wed, 18 Dec 2013 17:45:25 +0000
Subject: [PATCH] [SCons] Check for incompabible BLAS/LAPACK when building
 Matlab toolbox

Matlab's practice of substituting an "8 byte integer" BLAS/LAPACK
library for the "4 byte integer" BLAS/LAPACK libraries that Cantera is
designed to use causes Cantera to crash. This can only be avoided by
statically linking Cantera to BLAS and LAPACK, e.g. by using the
BLAS/LAPACK implementations included with Cantera.

Since the Matlab toolbox itself needs to be a shared library, it is
not usually possible to link statically link it with vendor-provided
BLAS/LAPACK libraries, since they are not compiled with the
appropriate options, i.e. '-fPIC'.

Resolves Issue 34.
---
 SConstruct | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/SConstruct b/SConstruct
index 501ae7652..17216f94e 100644
--- a/SConstruct
+++ b/SConstruct
@@ -974,6 +974,14 @@ if env['matlab_toolbox'] == 'y':
         print """ERROR: Unable to build the Matlab toolbox because 'matlab_path' has not been set."""
         sys.exit(1)
 
+    if env['blas_lapack_libs']:
+        print ('ERROR: The Matlab toolbox is incompatible with external BLAS '
+               'and LAPACK libraries. Unset blas_lapack_libs (e.g. "scons '
+               'build blas_lapack_libs=") in order to build the Matlab '
+               'toolbox, or set matlab_toolbox=n to use the specified BLAS/'
+               'LAPACK libraries and skip building the Matlab toolbox.')
+        sys.exit(1)
+
     if not (os.path.isdir(matPath) and
             os.path.isdir(pjoin(matPath, 'extern'))):
         print """ERROR: Path set for 'matlab_path' is not correct."""