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390 lines
12 KiB
390 lines
12 KiB
'\" t
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.TH "CARGO\-RUSTC" "1"
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.nh
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.ad l
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.ss \n[.ss] 0
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.SH "NAME"
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cargo\-rustc \- Compile the current package, and pass extra options to the compiler
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.SH "SYNOPSIS"
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\fBcargo rustc\fR [\fIoptions\fR] [\fB\-\-\fR \fIargs\fR]
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.SH "DESCRIPTION"
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The specified target for the current package (or package specified by \fB\-p\fR if
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provided) will be compiled along with all of its dependencies. The specified
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\fIargs\fR will all be passed to the final compiler invocation, not any of the
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dependencies. Note that the compiler will still unconditionally receive
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arguments such as \fB\-L\fR, \fB\-\-extern\fR, and \fB\-\-crate\-type\fR, and the specified
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\fIargs\fR will simply be added to the compiler invocation.
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.sp
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See <https://doc.rust\-lang.org/rustc/index.html> for documentation on rustc
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flags.
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.sp
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This command requires that only one target is being compiled when additional
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arguments are provided. If more than one target is available for the current
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package the filters of \fB\-\-lib\fR, \fB\-\-bin\fR, etc, must be used to select which
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target is compiled.
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.sp
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To pass flags to all compiler processes spawned by Cargo, use the \fBRUSTFLAGS\fR
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\fIenvironment variable\fR <https://doc.rust\-lang.org/cargo/reference/environment\-variables.html> or the
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\fBbuild.rustflags\fR \fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&.
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.SH "OPTIONS"
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.SS "Package Selection"
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By default, the package in the current working directory is selected. The \fB\-p\fR
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flag can be used to choose a different package in a workspace.
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.sp
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\fB\-p\fR \fIspec\fR,
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\fB\-\-package\fR \fIspec\fR
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.RS 4
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The package to build. See \fBcargo\-pkgid\fR(1) for the SPEC
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format.
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.RE
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.SS "Target Selection"
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When no target selection options are given, \fBcargo rustc\fR will build all
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binary and library targets of the selected package.
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.sp
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Passing target selection flags will build only the specified
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targets.
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.sp
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Note that \fB\-\-bin\fR, \fB\-\-example\fR, \fB\-\-test\fR and \fB\-\-bench\fR flags also
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support common Unix glob patterns like \fB*\fR, \fB?\fR and \fB[]\fR\&. However, to avoid your
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shell accidentally expanding glob patterns before Cargo handles them, you must
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use single quotes or double quotes around each glob pattern.
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.sp
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\fB\-\-lib\fR
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.RS 4
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Build the package's library.
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.RE
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.sp
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\fB\-\-bin\fR \fIname\fR\&...
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.RS 4
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Build the specified binary. This flag may be specified multiple times
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and supports common Unix glob patterns.
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.RE
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.sp
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\fB\-\-bins\fR
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.RS 4
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Build all binary targets.
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.RE
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.sp
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\fB\-\-example\fR \fIname\fR\&...
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.RS 4
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Build the specified example. This flag may be specified multiple times
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and supports common Unix glob patterns.
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.RE
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.sp
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\fB\-\-examples\fR
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.RS 4
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Build all example targets.
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.RE
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.sp
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\fB\-\-test\fR \fIname\fR\&...
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.RS 4
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Build the specified integration test. This flag may be specified
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multiple times and supports common Unix glob patterns.
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.RE
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.sp
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\fB\-\-tests\fR
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.RS 4
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Build all targets in test mode that have the \fBtest = true\fR manifest
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flag set. By default this includes the library and binaries built as
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unittests, and integration tests. Be aware that this will also build any
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required dependencies, so the lib target may be built twice (once as a
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unittest, and once as a dependency for binaries, integration tests, etc.).
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Targets may be enabled or disabled by setting the \fBtest\fR flag in the
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manifest settings for the target.
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.RE
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.sp
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\fB\-\-bench\fR \fIname\fR\&...
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.RS 4
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Build the specified benchmark. This flag may be specified multiple
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times and supports common Unix glob patterns.
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.RE
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.sp
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\fB\-\-benches\fR
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.RS 4
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Build all targets in benchmark mode that have the \fBbench = true\fR
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manifest flag set. By default this includes the library and binaries built
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as benchmarks, and bench targets. Be aware that this will also build any
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required dependencies, so the lib target may be built twice (once as a
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benchmark, and once as a dependency for binaries, benchmarks, etc.).
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Targets may be enabled or disabled by setting the \fBbench\fR flag in the
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manifest settings for the target.
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.RE
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.sp
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\fB\-\-all\-targets\fR
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.RS 4
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Build all targets. This is equivalent to specifying \fB\-\-lib \-\-bins \-\-tests \-\-benches \-\-examples\fR\&.
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.RE
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.SS "Feature Selection"
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The feature flags allow you to control the enabled features for the "current"
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package. The "current" package is the package in the current directory, or the
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one specified in \fB\-\-manifest\-path\fR\&. If running in the root of a virtual
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workspace, then the default features are selected for all workspace members,
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or all features if \fB\-\-all\-features\fR is specified.
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.sp
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When no feature options are given, the \fBdefault\fR feature is activated for
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every selected package.
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.sp
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\fB\-\-features\fR \fIfeatures\fR
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.RS 4
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Space or comma separated list of features to activate. These features only
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apply to the current directory's package. Features of direct dependencies
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may be enabled with \fB<dep\-name>/<feature\-name>\fR syntax. This flag may be
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specified multiple times, which enables all specified features.
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.RE
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.sp
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\fB\-\-all\-features\fR
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.RS 4
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Activate all available features of all selected packages.
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.RE
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.sp
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\fB\-\-no\-default\-features\fR
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.RS 4
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Do not activate the \fBdefault\fR feature of the current directory's package.
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.RE
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.SS "Compilation Options"
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.sp
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\fB\-\-target\fR \fItriple\fR
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.RS 4
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Build for the given architecture. The default is the host
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architecture. The general format of the triple is
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\fB<arch><sub>\-<vendor>\-<sys>\-<abi>\fR\&. Run \fBrustc \-\-print target\-list\fR for a
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list of supported targets.
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.sp
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This may also be specified with the \fBbuild.target\fR
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\fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&.
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.sp
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Note that specifying this flag makes Cargo run in a different mode where the
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target artifacts are placed in a separate directory. See the
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\fIbuild cache\fR <https://doc.rust\-lang.org/cargo/guide/build\-cache.html> documentation for more details.
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.RE
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.sp
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\fB\-\-release\fR
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.RS 4
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Build optimized artifacts with the \fBrelease\fR profile. See the
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PROFILES section for details on how this affects profile
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selection.
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.RE
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.SS "Output Options"
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.sp
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\fB\-\-target\-dir\fR \fIdirectory\fR
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.RS 4
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Directory for all generated artifacts and intermediate files. May also be
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specified with the \fBCARGO_TARGET_DIR\fR environment variable, or the
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\fBbuild.target\-dir\fR \fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&. Defaults
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to \fBtarget\fR in the root of the workspace.
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.RE
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.SS "Display Options"
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.sp
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\fB\-v\fR,
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\fB\-\-verbose\fR
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.RS 4
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Use verbose output. May be specified twice for "very verbose" output which
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includes extra output such as dependency warnings and build script output.
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May also be specified with the \fBterm.verbose\fR
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\fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&.
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.RE
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.sp
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\fB\-q\fR,
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\fB\-\-quiet\fR
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.RS 4
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No output printed to stdout.
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.RE
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.sp
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\fB\-\-color\fR \fIwhen\fR
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.RS 4
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Control when colored output is used. Valid values:
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBauto\fR (default): Automatically detect if color support is available on the
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terminal.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBalways\fR: Always display colors.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBnever\fR: Never display colors.
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.RE
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.sp
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May also be specified with the \fBterm.color\fR
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\fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&.
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.RE
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.sp
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\fB\-\-message\-format\fR \fIfmt\fR
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.RS 4
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The output format for diagnostic messages. Can be specified multiple times
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and consists of comma\-separated values. Valid values:
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBhuman\fR (default): Display in a human\-readable text format.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBshort\fR: Emit shorter, human\-readable text messages.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBjson\fR: Emit JSON messages to stdout. See
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\fIthe reference\fR <https://doc.rust\-lang.org/cargo/reference/external\-tools.html#json\-messages>
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for more details.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBjson\-diagnostic\-short\fR: Ensure the \fBrendered\fR field of JSON messages contains
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the "short" rendering from rustc.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBjson\-diagnostic\-rendered\-ansi\fR: Ensure the \fBrendered\fR field of JSON messages
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contains embedded ANSI color codes for respecting rustc's default color
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scheme.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fBjson\-render\-diagnostics\fR: Instruct Cargo to not include rustc diagnostics in
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in JSON messages printed, but instead Cargo itself should render the
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JSON diagnostics coming from rustc. Cargo's own JSON diagnostics and others
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coming from rustc are still emitted.
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.RE
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.RE
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.SS "Manifest Options"
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.sp
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\fB\-\-manifest\-path\fR \fIpath\fR
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.RS 4
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Path to the \fBCargo.toml\fR file. By default, Cargo searches for the
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\fBCargo.toml\fR file in the current directory or any parent directory.
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.RE
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.sp
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\fB\-\-frozen\fR,
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\fB\-\-locked\fR
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.RS 4
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Either of these flags requires that the \fBCargo.lock\fR file is
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up\-to\-date. If the lock file is missing, or it needs to be updated, Cargo will
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exit with an error. The \fB\-\-frozen\fR flag also prevents Cargo from
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attempting to access the network to determine if it is out\-of\-date.
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.sp
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These may be used in environments where you want to assert that the
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\fBCargo.lock\fR file is up\-to\-date (such as a CI build) or want to avoid network
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access.
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.RE
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.sp
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\fB\-\-offline\fR
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.RS 4
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Prevents Cargo from accessing the network for any reason. Without this
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flag, Cargo will stop with an error if it needs to access the network and
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the network is not available. With this flag, Cargo will attempt to
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proceed without the network if possible.
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.sp
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Beware that this may result in different dependency resolution than online
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mode. Cargo will restrict itself to crates that are downloaded locally, even
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if there might be a newer version as indicated in the local copy of the index.
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See the \fBcargo\-fetch\fR(1) command to download dependencies before going
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offline.
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.sp
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May also be specified with the \fBnet.offline\fR \fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&.
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.RE
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.SS "Common Options"
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.sp
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\fB+\fR\fItoolchain\fR
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.RS 4
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If Cargo has been installed with rustup, and the first argument to \fBcargo\fR
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begins with \fB+\fR, it will be interpreted as a rustup toolchain name (such
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as \fB+stable\fR or \fB+nightly\fR).
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See the \fIrustup documentation\fR <https://rust\-lang.github.io/rustup/overrides.html>
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for more information about how toolchain overrides work.
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.RE
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.sp
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\fB\-h\fR,
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\fB\-\-help\fR
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.RS 4
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Prints help information.
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.RE
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.sp
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\fB\-Z\fR \fIflag\fR
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.RS 4
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Unstable (nightly\-only) flags to Cargo. Run \fBcargo \-Z help\fR for details.
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.RE
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.SS "Miscellaneous Options"
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.sp
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\fB\-j\fR \fIN\fR,
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\fB\-\-jobs\fR \fIN\fR
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.RS 4
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Number of parallel jobs to run. May also be specified with the
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\fBbuild.jobs\fR \fIconfig value\fR <https://doc.rust\-lang.org/cargo/reference/config.html>\&. Defaults to
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the number of CPUs.
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.RE
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.SH "PROFILES"
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Profiles may be used to configure compiler options such as optimization levels
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and debug settings. See \fIthe reference\fR <https://doc.rust\-lang.org/cargo/reference/profiles.html> for more
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details.
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.sp
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Profile selection depends on the target and crate being built. By default the
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\fBdev\fR or \fBtest\fR profiles are used. If the \fB\-\-release\fR flag is given, then the
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\fBrelease\fR or \fBbench\fR profiles are used.
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.TS
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allbox tab(:);
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lt lt lt.
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T{
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Target
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T}:T{
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Default Profile
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T}:T{
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\fB\-\-release\fR Profile
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T}
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T{
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lib, bin, example
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T}:T{
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\fBdev\fR
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T}:T{
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\fBrelease\fR
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T}
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T{
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test, bench, or any target in "test" or "bench" mode
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T}:T{
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\fBtest\fR
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T}:T{
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\fBbench\fR
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T}
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.TE
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.sp
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.sp
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Dependencies use the \fBdev\fR/\fBrelease\fR profiles.
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.SH "ENVIRONMENT"
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See \fIthe reference\fR <https://doc.rust\-lang.org/cargo/reference/environment\-variables.html> for
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details on environment variables that Cargo reads.
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.SH "EXIT STATUS"
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fB0\fR: Cargo succeeded.
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.RE
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.sp
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.RS 4
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\h'-04'\(bu\h'+02'\fB101\fR: Cargo failed to complete.
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.RE
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.SH "EXAMPLES"
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.sp
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.RS 4
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\h'-04' 1.\h'+01'Check if your package (not including dependencies) uses unsafe code:
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.sp
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.RS 4
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.nf
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cargo rustc \-\-lib \-\- \-D unsafe\-code
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.fi
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.RE
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.RE
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.sp
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.RS 4
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\h'-04' 2.\h'+01'Try an experimental flag on the nightly compiler, such as this which prints
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the size of every type:
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.sp
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.RS 4
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.nf
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cargo rustc \-\-lib \-\- \-Z print\-type\-sizes
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.fi
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.RE
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.RE
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.SH "SEE ALSO"
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\fBcargo\fR(1), \fBcargo\-build\fR(1), \fBrustc\fR(1)
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