Please add .cc and .cxx to OTHER_ALLOWED_EXTENSIONS

[raybellis]

When using third party C++ code not originally targeting the Arduino it is not uncommon to find those source files with a ".cc" or ".cxx" extension.

These are currently unusable since the builder doesn't copy those files from src/* into the temporary build tree.

Please add those to the list of recognised source code extensions for C++ code.

[per1234]

Just for the sake of linking related feature requests together, I'll mention https://github.com/arduino/arduino-builder/issues/268 here.

[raybellis]

Oops, not sure how this ended up in arduino-cli instead of the core UI repository!

[per1234]

Hi @raybellis. I transferred it to this repository because this is where the code that would need to be changed to implement your request lives. To be specific, here:

arduino-cli/arduino/globals/globals.go

Lines 27 to 43 in 900654f

	// AdditionalFileValidExtensions lists any file extension the builder considers as valid
	AdditionalFileValidExtensions = map[string]struct{}{
	".h": empty,
	".c": empty,
	".hpp": empty,
	".hh": empty,
	".cpp": empty,
	".s": empty,
	}
	// SourceFilesValidExtensions lists valid extensions for source files (no headers)
	SourceFilesValidExtensions = map[string]struct{}{
	".c": empty,
	".cpp": empty,
	".s": empty,
	}
	)

The builder system has gradually been moved out of the Arduino IDE's Java codebase, first into arduino-builder, and now to its final home here in Arduino CLI. From here, it can be used by all the official (and 3rd party as well if they like) Arduino development software, including Arduino IDE, Arduino Web Editor, Arduino Pro IDE, and of course Arduino CLI itself.

[chenzhuoyu]

Any updates? @raybellis