text: from subprocess import call, PIPE, Popen
  import sys
  import re
  
  import pytest
  from numpy.testing import assert_
  
  from scipy.linalg import _flapack as flapack
  
  # XXX: this is copied from numpy trunk. Can be removed when we will depend on
  # numpy 1.3
  
  
  class FindDependenciesLdd:
      def __init__(self):
          self.cmd = ['ldd']
  
          try:
              call(self.cmd, stdout=PIPE, stderr=PIPE)
          except OSError as e:
              raise RuntimeError("command %s cannot be run" % self.cmd) from e
  
      def get_dependencies(self, file):
          p = Popen(self.cmd + [file], stdout=PIPE, stderr=PIPE)
          stdout, stderr = p.communicate()
          if not (p.returncode == 0):
              raise RuntimeError("Failed to check dependencies for %s" % file)
  
          return stdout
  
      def grep_dependencies(self, file, deps):
          stdout = self.get_dependencies(file)
  
          rdeps = dict([( dep.encode('latin1'), 
                          re.compile(dep.encode('latin1'))) for dep in deps])
          founds = []
          for l in stdout.splitlines():
              for k, v in rdeps.items():
                  if v.search(l):
                      founds.append(k)
  
          return founds
  
  
  class TestF77Mismatch:
      @pytest.mark.skipif(not(sys.platform[:5] == 'linux'),
                          reason="Skipping fortran compiler mismatch on non Linux platform")
      def test_lapack(self):
          f = FindDependenciesLdd()
          deps = f.grep_dependencies(flapack.__file__,
                                     ['libg2c', 'libgfortran'])
          assert_(not (len(deps) > 1),
  """Both g77 and gfortran runtimes linked in scipy.linalg.flapack ! This is
  likely to cause random crashes and wrong results. See numpy INSTALL.rst.txt for
  more information.""")
  