Index: scikit-learn-0.18.1/sklearn/_build_utils/__init__.py
===================================================================
--- scikit-learn-0.18.1.orig/sklearn/_build_utils/__init__.py
+++ scikit-learn-0.18.1/sklearn/_build_utils/__init__.py
@@ -31,7 +31,7 @@ def get_blas_info():
         return False
 
     blas_info = get_info('blas_opt', 0)
-    if (not blas_info) or atlas_not_found(blas_info):
+    if (not blas_info):
         cblas_libs = ['cblas']
         blas_info.pop('libraries', None)
     else:
Index: scikit-learn-0.18.1/sklearn/setup.py
===================================================================
--- scikit-learn-0.18.1.orig/sklearn/setup.py
+++ scikit-learn-0.18.1/sklearn/setup.py
@@ -63,14 +63,6 @@ def configuration(parent_package='', top
                          libraries=libraries,
                          )
 
-    # some libs needs cblas, fortran-compiled BLAS will not be sufficient
-    blas_info = get_info('blas_opt', 0)
-    if (not blas_info) or (
-            ('NO_ATLAS_INFO', 1) in blas_info.get('define_macros', [])):
-        config.add_library('cblas',
-                           sources=[join('src', 'cblas', '*.c')])
-        warnings.warn(BlasNotFoundError.__doc__)
-
     # the following packages depend on cblas, so they have to be build
     # after the above.
     config.add_subpackage('linear_model')