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    <p>As said by @jbworld you cannot load dynamic libraries on the iPhone, so this link should be made statically, at compilation time. While reading at the code of spatialite (that's an SQLite extension), I found that kind of invocation:</p> <pre><code>void spatialite_init (int verbose) { /* used when SQLite initializes SpatiaLite via statically linked lib */ sqlite3_auto_extension ((void (*)(void)) init_static_spatialite); } </code></pre> <p>And the <code>init_static_spatialite</code> code:</p> <pre><code>static void init_static_spatialite (sqlite3 * db, char **pzErrMsg, const sqlite3_api_routines * pApi) { SQLITE_EXTENSION_INIT2 (pApi); /* setting the POSIX locale for numeric */ setlocale (LC_NUMERIC, "POSIX"); *pzErrMsg = NULL; sqlite3_create_function (db, "spatialite_version", 0, SQLITE_ANY, 0, fnct_spatialite_version, 0, 0); sqlite3_create_function (db, "proj4_version", 0, SQLITE_ANY, 0, fnct_proj4_version, 0, 0); sqlite3_create_function (db, "geos_version", 0, SQLITE_ANY, 0, fnct_geos_version, 0, 0); sqlite3_create_function (db, "GeometryConstraints", 3, SQLITE_ANY, 0, fnct_GeometryConstraints, 0, 0); sqlite3_create_function (db, "CheckSpatialMetaData", 0, SQLITE_ANY, 0, fnct_CheckSpatialMetaData, 0, 0); ... </code></pre> <p>So it looks like if the <code>sqlite_auto_extension</code> enables you to statically link an extension. <a href="http://www.sqlite.org/c3ref/auto_extension.html" rel="nofollow noreferrer">The documentation</a> seems to confirm that:</p> <blockquote> <p>“This API can be invoked at program startup in order to register one or more statically linked extensions that will be available to all new database connections.”</p> </blockquote> <p>Then, at runtime, for spatialite, I just have to invoke the <code>spatialite_init(0)</code> to get the extension up and running.</p> <h2>Invoke such method <em>before</em> loading any sqlite DB.</h2> <p>Hope this helps.</p>
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    1. POHow to link a SQlite Extension Source File into Xcode for iPhone?
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    1. COYonel - I'll have to look into this in a couple of days. I voted you up for persistence and helpfulness. Promise you a tick too when I can verify. Cheers!
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    2. CO@crunchyt Did you manage to get this working? I'm in the same situation and could use some advice..
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    3. CO@StuR: Not so really. I could get a module to build into it, but not a custom extension.
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