When building with both Python 2 and Python 3 don't use RTLD_GLOBAL, so that
both may work.
diff --git a/src/Makefile b/src/Makefile
index 4315378..4a66bfa 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -408,6 +408,8 @@
# ln -s python3 python3.1
# If both python2.x and python3.x are enabled then the linking will be via
# dlopen(), dlsym(), dlclose(), i.e. pythonX.Y.so must be available
+# However, this may still cause problems, such as "import termios" failing.
+# Build two separate versions of Vim in that case.
#CONF_OPT_PYTHON = --enable-pythoninterp
#CONF_OPT_PYTHON3 = --enable-python3interp