Test and fix for the case where ffi.embedding_api() is called but

does not list any `extern "Python"` function

2 files changed, 4 insertions, 4 deletions

diff --git a/cffi/_embedding.h b/cffi/_embedding.h
index e863d85..4a42cbb 100644
--- a/cffi/_embedding.h
+++ b/cffi/_embedding.h
@@ -22,7 +22,8 @@ extern "C" {
 
    * _cffi_call_python_org, which on CPython is actually part of the
      _cffi_exports[] array, is the function pointer copied from
-     _cffi_backend.
+     _cffi_backend.  If _cffi_start_python() fails, then this is set
+     to NULL; otherwise, it should never be NULL.
 
    After initialization is complete, both are equal.  However, the
    first one remains equal to &_cffi_start_and_call_python until the
diff --git a/cffi/recompiler.py b/cffi/recompiler.py
index 86b37d7..16a7078 100644
--- a/cffi/recompiler.py
+++ b/cffi/recompiler.py
@@ -406,9 +406,8 @@ class Recompiler:
         else:
             prnt('  NULL,  /* no includes */')
         prnt('  %d,  /* num_types */' % (len(self.cffi_types),))
-        flags = 0
-        if self._num_externpy:
-            flags |= 1     # set to mean that we use extern "Python"
+        # set 'flags' to 1 in embedding mode, 0 otherwise
+        flags = int(self.ffi._embedding is not None)
         prnt('  %d,  /* flags */' % flags)
         prnt('};')
         prnt()