fixes #3556: more robust determination of python library name and directory in…

theano/gof/cmodule.py

@@ -1649,9 +1649,22 @@ def std_lib_dirs_and_libs():
     elif sys.platform == 'darwin':
         std_lib_dirs_and_libs.data = [], []
     else:
+        # assume Linux 
         # Typical include directory: /usr/include/python2.6
-        libname = os.path.basename(python_inc)
-        std_lib_dirs_and_libs.data = [libname], []
+        
+        # get the name of the python library (shared object)
+        libname = distutils.sysconfig.get_config_var("LDLIBRARY")
+
+        if libname.startswith("lib"):
+            libname = libname[3:]
+
+        # remove extension if present
+        if libname.endswith(".so"):
+            libname = libname[:-3]
+    
+        libdir = distutils.sysconfig.get_config_var("LIBDIR")
+
+        std_lib_dirs_and_libs.data = [ libname ], [ libdir ]
 
     # sometimes, the linker cannot find -lpython so we need to tell it
     # explicitly where it is located this returns