mongoose/docs/build-options/intro.md

title	items
Build Options	type name file enabling-flags.md type name file disabling-flags.md type name file platform-spec.md type name file tunables.md

Mongoose source code ships in a single .c file that contains functionality for all supported protocols (modules). Modules can be disabled at compile time which reduces executable size. That can be done by setting preprocessor flags. Also, some preprocessor flags can be used to tune internal Mongoose parameters.

To set a preprocessor flag during compile time, use -D <PREPROCESSOR_FLAG> compiler option. For example, to disable both MQTT and JSON-RPC, compile the application my_app.c like this (assumed UNIX system):

  $ cc my_app.c mongoose.c -D MG_DISABLE_MQTT -D MG_DISABLE_JSON_RPC