Bug #1594809: add a note to README regarding PYTHONPATH and make install.
diff --git a/README b/README
index 16dfaf3..3516f8e 100644
--- a/README
+++ b/README
@@ -223,6 +223,11 @@
available for all modern systems, either in the form of updated
compilers from the vendor, or one of the free compilers (gcc).
+If "make install" fails mysteriously during the "compiling the library"
+step, make sure that you don't have any of the PYTHONPATH or PYTHONHOME
+environment variables set, as they may interfere with the newly built
+executable which is compiling the library.
+
Unsupported systems
-------------------