remove paths to Anaconda installation from include and library search…

… paths

easybuild/easyblocks/a/anaconda.py

@@ -40,6 +40,25 @@
 class EB_Anaconda(Binary):
     """Support for building/installing Anaconda and Miniconda."""
 
+    def __init__(self, *args, **kwargs):
+        """Initialize class variables."""
+        super().__init__(*args, **kwargs)
+
+        # Do not add installation to search paths for headers or libraries to avoid
+        # that the Anaconda environment is used by other software at building or linking time.
+        # LD_LIBRARY_PATH issue discusses here:
+        # http://superuser.com/questions/980250/environment-module-cannot-initialize-tcl
+        mod_env_headers = self.module_load_environment.alias_vars('HEADERS')
+        mod_env_libs = ['LD_LIBRARY_PATH', 'LIBRARY_PATH']
+        mod_env_cmake = ['CMAKE_LIBRARY_PATH', 'CMAKE_PREFIX_PATH']
+        for disallowed_var in mod_env_headers + mod_env_libs + mod_env_cmake:
+            try:
+                delattr(self.module_load_environment, disallowed_var)
+            except AttributeError:
+                pass
+            else:
+                self.log.debug(f"Purposely not updating ${disallowed_var} in {self.name} module file")
+
     def install_step(self):
         """Copy all files in build directory to the install directory"""