* Use `make check-lexer` to verify the grammar.
* Extend grammar/README
* Add make clean-grammar rule
* Add target `check-build-lexer-verifier` to `make tidy`, so it will build the verifier with every build and catch future errors
* Search for antlr4 with configure and find
We don't actually probe for javac in all circumstances, so if you have
javac installed, but don't have antlr4 installed, and you're on Mac OS
X, then you'll get a message that javac is missing, even though that's
wrong.
To fix this, let's just be a bit more generic in the message, so that
it's the same no matter what part of the lexer tests you're missing.
cc
https://www.reddit.com/r/rust/comments/3m199d/running_make_check_on_the_source_code_says_javac/
This removes a large array of deprecated functionality, regardless of how
recently it was deprecated. The purpose of this commit is to clean out the
standard libraries and compiler for the upcoming alpha release.
Some notable compiler changes were to enable warnings for all now-deprecated
command line arguments (previously the deprecated versions were silently
accepted) as well as removing deriving(Zero) entirely (the trait was removed).
The distribution no longer contains the libtime or libregex_macros crates. Both
of these have been deprecated for some time and are available externally.
