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-rw-r--r--var/spack/repos/builtin/packages/falcon/Py_None.patch10
-rw-r--r--var/spack/repos/builtin/packages/falcon/package.py4
2 files changed, 14 insertions, 0 deletions
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:')