enable sqlite3 on Windows and avoid unresolved symbol

Author: lukasstadler

graalpython/com.oracle.graal.python.cext/CMakeLists.txt

@@ -174,12 +174,12 @@ simple_native_module("_mmap")
 simple_native_module("_cpython_sre")
 simple_native_module("_cpython_unicodedata")
 simple_native_module("_cpython_struct")
+simple_native_module("_sqlite3")
 
 if(NOT WIN32)
     native_module("_testcapi" FALSE "${SRC_DIR}/modules/_testcapi.c")
     simple_native_module("_testmultiphase")
     simple_native_module("_ctypes_test")
-    simple_native_module("_sqlite3")
 
     ###################### BZIP2 ########################
     if(DEFINED LIBBZ2_BUILD_FILE)

graalpython/com.oracle.graal.python.cext/modules/_sqlite/module.c

@@ -420,7 +420,10 @@ PyMODINIT_FUNC PyInit__sqlite3(void)
         goto error;
     }
 
-    if (PyModule_AddStringConstant(module, "sqlite_version", sqlite3_libversion())) {
+    /**
+     * GraalPy change: use SQLITE_VERSION from builtin sqlite3
+     */
+    if (PyModule_AddStringConstant(module, "sqlite_version", SQLITE_VERSION)) {
         goto error;
     }
 

graalpython/com.oracle.graal.python.cext/modules/_sqlite3.c

@@ -39,6 +39,9 @@
  * SOFTWARE.
  */
 
+// prevent unresolved symbols
+#define SQLITE_EXTERN
+
 #include "_sqlite/cache.c"
 #include "_sqlite/connection.c"
 #include "_sqlite/cursor.c"