From 7319516749358b7af4e71b26774d4ce03459a9df Mon Sep 17 00:00:00 2001
From: noguchi-k <55966120+noguchi-k@users.noreply.github.com>
Date: Fri, 17 Jan 2020 03:14:52 +0900
Subject: falcon: Set Py_None to return value (#14532)

---
 var/spack/repos/builtin/packages/falcon/Py_None.patch | 10 ++++++++++
 var/spack/repos/builtin/packages/falcon/package.py    |  4 ++++
 2 files changed, 14 insertions(+)
 create mode 100644 var/spack/repos/builtin/packages/falcon/Py_None.patch

diff --git a/var/spack/repos/builtin/packages/falcon/Py_None.patch b/var/spack/repos/builtin/packages/falcon/Py_None.patch
new file mode 100644
index 0000000000..6f7ed073e7
--- /dev/null
+++ b/var/spack/repos/builtin/packages/falcon/Py_None.patch
@@ -0,0 +1,10 @@
+--- spack-src/src/c/ext_falcon.c.org	2020-01-15 17:40:41.279400137 +0900
++++ spack-src/src/c/ext_falcon.c	2020-01-15 17:44:47.785718088 +0900
+@@ -9,5 +9,6 @@
+ 
+     m = Py_InitModule("ext_falcon", SpamMethods);
+     if (m == NULL)
+-        return;
++        Py_INCREF(Py_None);
++        return Py_None;
+ }
diff --git a/var/spack/repos/builtin/packages/falcon/package.py b/var/spack/repos/builtin/packages/falcon/package.py
index 558866ca13..36649dd7e6 100644
--- a/var/spack/repos/builtin/packages/falcon/package.py
+++ b/var/spack/repos/builtin/packages/falcon/package.py
@@ -28,3 +28,7 @@ class Falcon(PythonPackage):
     depends_on('pacbio-daligner', type='run')
     depends_on('pacbio-dextractor', type='run')
     depends_on('pacbio-damasker', type='run')
+
+    # Python version 3 and later should return
+    # a value of PyObject type. [-Wreturn-type]
+    patch('Py_None.patch', when='^python@3:')
-- 
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