Write to XCode build transcript

Question

Is there any way to write to the XCode build transcript? What i want to do, is throw a warning if a device is not attached to the computer instead of an assertion failure in my unit test cases (some cases rely on an attached ipod).

I thought of something like the standard compiler warnings (only with custom message).

Thanks.

Answer 1

In shell build phases you can write to stderr using the following format:

<filename>:<linenumber>: error | warn | note : <message>\n

It's the same format gcc uses to show errors. The filename:linenumber part can be omitted. Depending on the mode (error, warn, note), Xcode will show your message with a red or yellow badge.

If you include an absolute file path and a line number (if the error occurred in a file), double clicking the error in the build log lets Xcode open the file and jumps to the line, even if it is not part of the project. Very handy.