There seem to be some irrelevant and duplicate SQLCIPHER_CFLAGS defined in the Makefile:

• SQLITE_THREADSAFE - appears twice (first time with correct [default] value, second time with no value specified)
• SQLITE_ENABLE_MEMORY_MANAGEMENT - appears twice
• SQLITE_ENABLE_FTS3_BACKWARDS - does not appear in https://www.sqlite.org/compile.html or sqlcipher source
• SQLITE_ENABLE_LOAD_EXTENSION - Is there any way a SQLCipher user would actually load binary extensions on Android?
• SQLITE_ENABLE_COLUMN_METADATA - from https://www.sqlite.org/compile.html the following functions do not seem to be used here: sqlite3_column_database_name(), sqlite3_column_database_name16(), sqlite3_column_table_name(), sqlite3_column_table_name16(), sqlite3_column_origin_name(), or sqlite3_column_origin_name16()
• SQLITE_ENABLE_UNLOCK_NOTIFY - sqlite3_unlock_notify() not used here
• SQLITE_ENABLE_FTS4_UNICODE61 - I did not find it in https://www.sqlite.org/compile.html or SQLCipher source
• NDEBUG - not documented in https://www.sqlite.org/compile.html. Looking through the generated amalgamation it seems from one of the headers that NDEBUG will be automatically defined or undefined opposite toSQLITE_DEBUG.

Also: looking at https://www.sqlite.org/compile.html#recommended_compile_time_options I was wondering if the following items should be defined:

• SQLITE_OMIT_DECLTYPE (sqlite3_column_decltype() and sqlite3_column_decltype16() do not seem to be used here)
• SQLITE_OMIT_DEPRECATED - none of the reference functions (sqlite3_aggregate_count(), sqlite3_expired(), sqlite3_transfer_bindings(), sqlite3_global_recover(), sqlite3_thread_cleanup(), or sqlite3_memory_alarm()) seem to be used here
• SQLITE_OMIT_PROGRESS_CALLBACK (sqlite3_progress_handler() does not seem to be used here)
• SQLITE_OMIT_SHARED_CACHE (sqlite3_enable_shared_cache() does not seem to be used here)

In general I would like to get these build settings consistent for Android, iOS, and Windows in my Cordova plugin and would like to avoid maintaining a custom Android build if possible. Thanks for your consideration.

P.S. I would be happy to raise a pull request if desired.