From 34605922dda6482da60e5a62f09ee05a28658fc3 Mon Sep 17 00:00:00 2001
From: Thomas Robitaille <thomas.robitaille@gmail.com>
Date: Thu, 7 Sep 2023 22:16:09 +0100
Subject: [PATCH] Added comment about workaround

---
 erfa/ufunc.c.templ | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/erfa/ufunc.c.templ b/erfa/ufunc.c.templ
index be82771..8c6baec 100644
--- a/erfa/ufunc.c.templ
+++ b/erfa/ufunc.c.templ
@@ -17,6 +17,13 @@
 #include "erfa.h"
 #include "erfaextra.h"
 
+// On gcc<10 we can run into the following:
+//
+//   error: dereferencing pointer to incomplete type 'PyTypeObject'
+//
+// As mentioned in https://github.com/numpy/numpy/issues/16970,
+// the workaround is to define a fake _typeobject struct.
+
 struct _typeobject {
     int dummy;
 };