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-rw-r--r--scripts/qapi-types.py8
1 files changed, 8 insertions, 0 deletions
diff --git a/scripts/qapi-types.py b/scripts/qapi-types.py
index d2f815bca2..1eb272dd26 100644
--- a/scripts/qapi-types.py
+++ b/scripts/qapi-types.py
@@ -99,6 +99,14 @@ struct %(name)s
ret += generate_struct_fields(members)
+ # Make sure that all structs have at least one field; this avoids
+ # potential issues with attempting to malloc space for zero-length structs
+ # in C, and also incompatibility with C++ (where an empty struct is size 1).
+ if not base and not members:
+ ret += mcgen('''
+ char qapi_dummy_field_for_empty_struct;
+''')
+
if len(fieldname):
fieldname = " " + fieldname
ret += mcgen('''