Description
This is a fairly trivial issue, but on current OS X, javac, along with other commands from the JDK, is actually a wrapper program which checks if a JDK is installed; if one is not, it quits and pops up this message in the UI:
The rust configure script checks for javac by attempting to run it, so it produces the dialog, which is a bit annoying.
This is pretty poor behavior on OS X's part, since it should be no surprise that scripts would try to execute a command line tool. And, of course, it can be avoided by either installing the JDK or removing the wrapper binary. However, the configure script could work around this easily: since javac is only used by Rust in combination with antlr4 and grun, neither of which is likely to be installed if a JDK isn't, the script should check for those first, and skip the javac check if they aren't found.