While trying to improve my app’s memory usage, I tried to add a call to SQLite’s routine to release memory cache: sqlite3_release_memory().   But when I tried to build it, I got the following error:

ErrorDot“_sqlite3_release_memory”, referenced from:
-[AppDelegate applicationDidReceiveMemoryWarning:] in AppDelegate.o
symbol(s) not found
collect2: ld returned 1 exit status

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