gh-140550: Fix PyABIInfo_VAR macro: avoid ";" (#157539)

Co-authored-by: Victor Stinner <vstinner@python.org>

Author: encukou

Include/modsupport.h

@@ -140,7 +140,7 @@ PyAPI_FUNC(int) PyABIInfo_Check(PyABIInfo *info, const char *module_name);
     /////////////////////////////////////////////////////////
 
 #define PyABIInfo_VAR(NAME) \
-    static PyABIInfo NAME = _PyABIInfo_DEFAULT;
+    static PyABIInfo NAME = _PyABIInfo_DEFAULT
 
 #undef _PyABIInfo_DEFAULT_STABLE
 #undef _PyABIInfo_DEFAULT_FT

Misc/NEWS.d/next/C_API/2026-09-14-18-07-43.gh-issue-140550.fLVOGn.rst

@@ -0,0 +1,3 @@
+Fix the :c:macro:`PyABIInfo_VAR` macro: remove redundant ``;``. Before,
+``PyABIInfo_VAR(abi_info);`` code added two ``;;`` which is illegal in C++03.
+Patch by Victor Stinner.