changing default blas.ldflags to copy numpy configuration

theano/configdefaults.py

@@ -25,10 +25,6 @@ AddConfigVar('nocleanup',
         "suppress the deletion of code files that did not compile cleanly",
         BoolParam(False))
 
-AddConfigVar('blas.ldflags',
-        "lib[s] to include for [Fortran] level-3 blas implementation",
-        StrParam("-lblas"))
-
 AddConfigVar('tensor.cmp_sloppy',
         "Relax tensor._allclose (0) not at all, (1) a bit, (2) more",
         IntParam(0, lambda i: i in (0,1,2)))

theano/tensor/blas.py

@@ -2,7 +2,8 @@
 
 import sys, traceback, logging
 import numpy
-from ..configparser import config
+import numpy.distutils
+from ..configparser import config, AddConfigVar, StrParam
 from theano.gof import (utils, Op, Apply, view_roots, PatternSub, DestroyHandler, 
         SeqOptimizer, local_optimizer, Optimizer, LocalOptimizer, OpKeyOptimizer, 
         InconsistencyError, toolbox)
@@ -17,6 +18,18 @@ from theano import compile  #to register the optimizer built by this file
 
 from theano.tensor.blas_headers import cblas_header_text, blas_header_text
 
+def default_blas_ldflags():
+    try:
+        return ' '.join('-l%s'%l 
+                for l in numpy.distutils.__config__.blas_opt_info['libraries'])
+    except:
+        return "-lblas"
+
+AddConfigVar('blas.ldflags',
+        "lib[s] to include for [Fortran] level-3 blas implementation",
+        StrParam(default_blas_ldflags()))
+
+
 _logger = logging.getLogger('theano.tensor.blas')
 _logger.setLevel(logging.WARN)
 def debug(*msg): _logger.debug(' '.join(str(m) for m in msg))