.TH RUSTC "1" "October 2011" "Rust" "User Commands"
.SH NAME
rustc \- rust compiler
.SH SYNOPSIS
rustc [\fB-h\fR] [\fB-v\fR] [\fB-o\fR \fIoutfile\fR]
      [\fB--lib\fR] [\fB--static\fR] [\fB-L\fR \fIpath\fR]
      [\fB-g\fR] [\fB-S\fR] [\fB-c\fR] <\fIinput\fR>
.PP
Only the most commonly-used options are listed here. All options are listed and
described below.
.SH DESCRIPTION
This program is a compiler for the Rust language, available at
<\fBhttps://github.com/graydon/rust\fR>.
.SH OPTIONS
.TP
\fB-h, --help\fR: Display help.
.TP
\fB-v, --version\fR: Display version information.
.TP
\fB-o\fR \fIfilename\fR: Write output to \fIfilename\fR. The default output
filename for \fBfoo.rs\fR is otherwise \fBfoo\fR (when compiling a binary),
\fBfoo\fR (when compiling a library), \fBfoo.o\fR (when using \fB-c\fR),
\fBfoo.s\fR (when using \fB-S\fR) or \fBfoo.bc\fR (when using
\fB--emit-llvm\fR).
.TP
\fB--lib\fR: Compile and link a library crate into a shared object.
.TP
\fB--static\fR: Produce a statically-linked binary, or generate a static
library.
.TP
\fB--pretty\fR \fItype\fR: Pretty-print the input. Valid \fItype\fRs are:
.RS
.TP
\fBnormal\fR: Un-annotated source.
.TP
\fBexpanded\fR: Crates expanded.
.TP
\fBtyped\fR: Crates expanded, all expressions annotated with types.
.TP
\fBidentified\fR: Fully parenthesized, ast nodes and blocks annotated with IDs.
.RE
.TP
\fB--ls\fR: Lists symbols defined by the specified \fBcompiled\fR library.
.TP
\fB-L\fR \fIpath\fR: Adds \fIpath\fR to the library search path.
.TP
\fB--noverify\fR: Disables LLVM verification pass, which does sanity checking of
bitcode generated by rustc. Using this option gives a slight speedup, at the
cost of vastly reduced ability to catch rustc bugs. See
<\fBhttp://llvm.org/docs/Passes.html\fR> for a list of properties checked.
.TP
\fB--parse-only\fR: Run the parse phase only. If parsing succeeds, produces no
output.
.TP
\fB--no-trans\fR: Run all passes except translation. Produces no output.
.TP
\fB-g\fR: Produce debug info.
.TP
\fB--OptLevel\fR=\fIlevel\fR: Set optimization level to \fIlevel\fR.
.TP
\fB-O\fR: Equal to --OptLevel=2
.TP
\fB-S\fR: Compile to assembly, but do not assemble or link.
.TP
\fB-c\fR: Compile and assemble, but do not link.
.TP
\fB--emit-llvm\fR: Generate llvm bitcode.
.TP
\fB--save-temps\fR: For foo.rs, save generated bitcode before optimization to
\fBfoo.bc\fR, bitcode after optimization to \fBfoo.opt.bc\fR, and the generated
object file to \fBfoo.o\fR.
.TP
\fB--stats\fR: Print statistics about compilation.
.TP
\fB--cfg\fR \fIcfgspec\fR: Provide a crate config spec.
.TP
\fB--time-passes\fR: Print runtimes of compilation phases.
.TP
\fB--time-llvm-passes\fR: Print runtimes of llvm phases.
.TP
\fB--sysroot\fR \fIpath\fR: Set the system root. Default is the directory above
rustc's.
.TP
\fB--target\fR \fIgnu-config-name\fR: Set the compilation target, which is a
string of the form \fBcpu\fR-\fBmanufacturer\fR-\fBkernel\fR[-\fBos\fR]. Example
values include "i686-unknown-linux-gnu" and "mips-idt-ecoff"; see
<\fBhttp://sources.redhat.com/autobook/autobook/autobook_17.html\fR>. If not
supplied, the host triple is used (see \fB--version\fR output).
.TP
\fB--no-typestate\fR: Disable the typestate pass. This breaks some safety
guarantees of the language and is quite dangerous.
.TP
\fB--test\fR: Build a test harness.
.TP
\fB--gc\fR: \fBEXPERIMENTAL\fR. Garbage-collect shared data.
.TP
\fB--stack-growth\fR: \fBEXPERIMENTAL\fR. Perform stack growth checks.
.SH "BUGS"
See \fBhttps://github.com/graydon/rust/issues\fR for a list of known bugs.
.SH "AUTHOR"
See \fBAUTHORS.txt\fR in the rust source distribution. Graydon Hoare
<\fIgraydon@mozilla.com\fR> is the project leader.
.SH "COPYRIGHT"
See \fBLICENSE.txt\fR in the rust source distribution.