5 years, 7 months ago.

How to configure a --library build of mbedOS?

I want to build a library of mbedOS so that I can link multiple applications to it.

I can build the library using e.g:

$ mbed compile  -m K64F -t GCC_ARM  --library --profile tools/profiles/debug.json

This gives me the expected build results under BUILD.

However, I need to change some of the configuration options for the library being built. I had hoped I could do this using the app-config parameter and point it at a file containing a suitable "target_overrides" object e.g.

$ mbed compile  -m K64F -t GCC_ARM  --app-config lib-conf.json --library --profile tools/profiles/debug.json

[lib-conf.json]
{
    "name": "nick-application",
    "target_overrides": {
        "*": {
            "platform.stdio_flush_at_exit": true,
            "platform.stdio_convert_newlines" : false,
            "platform.stdio_flush_at_exit" : true,
            "platform.stdio_baud_rate" : 115200,
            "platform.default_serial_baud_rate": 115200
        }
    }
}

This doesn't work. The app-config parameter is ignored. You can specify an invalid file path or corrupt the contents of a valid file and its completely ignored. If you remove the -library option then the -app-config file is found and processed correctly to generate the expected mbed_config.h contents.

This also affects the configuration of mbedtls as the only way to do that (short of editing the config.h file) is to specify the following somewhere:

{
    "macros": ["MBEDTLS_USER_CONFIG_FILE=\"mbedtls-config-changes.h\""]
}

So the question is, how do I configure a library build of mbedOS?

$ mbed -version
1.8.1

Thanks