Merge pull request #2022 from boegel/numexpr_extension

fix numexpr easyblock to allow (correct) installing it as extension

easybuild/easyblocks/n/numexpr.py

@@ -52,16 +52,12 @@ def __init__(self, *args, **kwargs):
 
         self.imkl_root = None
 
-    def prepare_step(self, *args, **kwargs):
-        """Prepare environment for building and installing numexpr."""
-        super(EB_numexpr, self).prepare_step(*args, **kwargs)
-
-        self.imkl_root = get_software_root('imkl')
-
     def configure_step(self):
         """Custom configuration procedure for numexpr."""
         super(EB_numexpr, self).configure_step()
 
+        self.imkl_root = get_software_root('imkl')
+
         # if Intel MKL is available, set up site.cfg such that the right VML library is used;
         # this makes a *big* difference in terms of performance;
         # see also https://github.com/pydata/numexpr/blob/master/site.cfg.example
@@ -103,4 +99,4 @@ def sanity_check_step(self):
         if self.imkl_root:
             custom_commands.append("python -c 'import numexpr; assert(numexpr.use_vml)'")
 
-        super(EB_numexpr, self).sanity_check_step(custom_commands=custom_commands)
+        return super(EB_numexpr, self).sanity_check_step(custom_commands=custom_commands)