.TH RUSTC "1" "February 2013" "rustc 0.6" "User Commands"
.SH NAME
rustc \- rust compiler
.SH SYNOPSIS
.B rustc
[\fIOPTIONS\fR] \fIINPUT\fR

.SH DESCRIPTION
This program is a compiler for the Rust language, available at
<\fBhttps://www.rust-lang.org\fR>.

.SH OPTIONS

.TP
\fB\-\-bin\fR
Compile an executable crate (default)
.TP
\fB\-c\fR
Compile and assemble, but do not link
.TP
\fB\-\-cfg\fR SPEC
Configure the compilation environment
.TP
\fB\-\-emit\-llvm\fR
Produce an LLVM bitcode file
.TP
\fB\-h\fR, \fB\-\-help\fR
Display this message
.TP
\fB\-L\fR PATH
Add a directory to the library search path
.TP
\fB\-\-lib\fR
Compile a library crate
.TP
\fB\-\-ls\fR
List the symbols defined by a library crate
.TP
\fB\-\-no\-trans\fR
Run all passes except translation; no output
.TP
\fB\-O\fR
Equivalent to \fI\-\-opt\-level=2\fR
.TP
\fB\-o\fR FILENAME
Write output to <filename>
.TP
\fB\-\-opt\-level\fR LEVEL
Optimize with possible levels 0-3
.TP
\fB\-\-out\-dir\fR DIR
Write output to compiler-chosen filename in <dir>
.TP
\fB\-\-parse\-only\fR
Parse only; do not compile, assemble, or link
.TP
\fB\-\-pretty\fR [TYPE]
Pretty-print the input instead of compiling; valid types are: normal
(un-annotated source), expanded (crates expanded), typed (crates
expanded, with type annotations), or identified (fully parenthesized,
AST nodes and blocks with IDs)
.TP
\fB\-S\fR
Compile only; do not assemble or link
.TP
\fB\-\-save\-temps\fR
Write intermediate files (.bc, .opt.bc, .o) in addition to normal output
.TP
\fB\-\-sysroot\fR PATH
Override the system root
.TP
\fB\-\-test\fR
Build a test harness
.TP
\fB\-\-target\fR TRIPLE
Target triple cpu-manufacturer-kernel[-os] to compile for (see
http://sources.redhat.com/autobook/autobook/autobook_17.html
for detail)
.TP
\fB\-W\fR help
Print 'lint' options and default settings
.TP
\fB\-W\fR OPT, \fB\-\-warn\fR OPT
Set lint warnings
.TP
\fB\-A\fR OPT, \fB\-\-allow\fR OPT
Set lint allowed
.TP
\fB\-D\fR OPT, \fB\-\-deny\fR OPT
Set lint denied
.TP
\fB\-F\fR OPT, \fB\-\-forbid\fR OPT
Set lint forbidden
.TP
\fB\-Z\fR FLAG
Set internal debugging options. Use "-Z help" to print available options.

Available debug flags are:
.RS
.IP \[bu]
\fBverbose\fR - in general, enable more debug printouts
.IP \[bu]
\fBtime\-passes\fR - measure time of each rustc pass
.IP \[bu]
\fBcount\-llvm\-insns\fR - count where LLVM instrs originate
.IP \[bu]
\fBtime\-llvm\-passes\fR - measure time of each LLVM pass
.IP \[bu]
\fBtrans\-stats\fR - gather trans statistics
.IP \[bu]
\fBno\-asm\-comments\fR - omit comments when using \fI\-S\fR
.IP \[bu]
\fBno\-verify\fR - skip LLVM verification
.IP \[bu]
\fBtrace\fR - emit trace logs
.IP \[bu]
\fBcoherence\fR - perform coherence checking
.IP \[bu]
\fBborrowck\-stats\fR - gather borrowck statistics
.IP \[bu]
\fBborrowck\-note\-pure\fR - note where purity is req'd
.IP \[bu]
\fBborrowck\-note\-loan\fR - note where loans are req'd
.IP \[bu]
\fBno\-landing\-pads\fR - omit landing pads for unwinding
.IP \[bu]
\fBdebug\-llvm\fR - enable debug output from LLVM
.IP \[bu]
\fBcount\-type\-sizes\fR - count the sizes of aggregate types
.IP \[bu]
\fBmeta\-stats\fR - gather metadata statistics
.IP \[bu]
\fBno\-opt\fR - do not optimize, even if \fI\-O\fR is passed
.IP \[bu]
\fBno\-monomorphic\-collapse\fR - do not collapse template instantiations
.IP \[bu]
\fBgc\fR - Garbage collect shared data (experimental)
.IP \[bu]
\fBjit\fR - Execute using JIT (experimental)
.IP \[bu]
\fBextra\-debug\-info\fR - Extra debugging info (experimental)
.IP \[bu]
\fBdebug\-info\fR - Produce debug info (experimental)
.IP \[bu]
\fBstatic\fR - Use or produce static libraries or binaries (experimental)
.RE
.TP
\fB\-v\fR, \fB\-\-version\fR
Print version info and exit

.SH "EXAMPLES"
To build an executable from a source file with a main function:
    $ rustc -o hello hello.rs

To build a library from a source file:
    $ rustc --lib hello-lib.rs

To build either with a crate (.rc) file:
    $ rustc hello.rc

To build an executable with debug info (experimental):
    $ rustc -Z debug-info -o hello hello.rs


.SH "BUGS"
See <\fBhttps://github.com/mozilla/rust/issues\fR> for issues.

.SH "AUTHOR"
See \fBAUTHORS.txt\fR in the rust source distribution. Graydon Hoare
<\fIgraydon@mozilla.com\fR> is the project leader.

.SH "COPYRIGHT"
This work is dual-licensed under Apache 2.0 and MIT terms.  See \fBCOPYRIGHT\fR
file in the rust source distribution.