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18 lines
632 B
Markdown
18 lines
632 B
Markdown
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---
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title: Build Options
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---
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Mongoose source code ships in a single .c file that contains functionality
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for all supported protocols (modules). Modules can be disabled at compile
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time which reduces executable size. That can be done by setting preprocessor
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flags. Also, some preprocessor flags can be used to tune internal Mongoose
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parameters.
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To set a preprocessor flag during compile time, use `-D <PREPROCESSOR_FLAG>`
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compiler option. For example, to disable both MQTT and JSON-RPC,
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compile the application `my_app.c` like this (assumed UNIX system):
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```
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$ cc my_app.c mongoose.c -D MG_DISABLE_MQTT -D MG_DISABLE_JSON_RPC
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```
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