There are large number of options accepted by this script to alter the
configuration used later in the build process. Some options to note:
-- `--enable-debug` - Build a debug version of the compiler (disables optimizations)
+- `--enable-debug` - Build a debug version of the compiler (disables optimizations,
+ which speeds up compilation of stage1 rustc)
- `--enable-optimize` - Enable optimizations (can be used with `--enable-debug`
to make a debug build with optimizations)
- `--disable-valgrind-rpass` - Don't run tests with valgrind
cases we don't need to build the stage2 compiler, so we can save time by not
building it. The stage1 compiler is a fully functioning compiler and
(probably) will be enough to determine if your change works as expected.
+- `make $host/stage1/bin/rustc` - Where $host is a target triple like x86_64-unknown-linux-gnu.
+ This will build just rustc, without libstd. This is the fastest way to recompile after
+ you changed only rustc source code. Note however that the resulting rustc binary
+ won't have a stdlib to link against by default. You can build libstd once with
+ `make rustc-stage1`, rustc will pick it up afterwards. libstd is only guaranteed to
+ work if recompiled, so if there are any issues recompile it.
- `make check` - build the full compiler & run all tests (takes a while). This
is what gets run by the continuous integration system against your pull
request. You should run this before submitting to make sure your tests pass