rust/src/bootstrap/config.toml.example

# Sample TOML configuration file for building Rust.
#
# All options are commented out by default in this file, and they're commented
# out with their default values. The build system by default looks for
# `config.toml` in the current directory of a build for build configuration, but
# a custom configuration file can also be specified with `--config` to the build
# system.

# =============================================================================
# Tweaking how LLVM is compiled
# =============================================================================
[llvm]

# Indicates whether the LLVM build is a Release or Debug build
#optimize = true

# Indicates whether the LLVM assertions are enabled or not
#assertions = false

# Indicates whether ccache is used when building LLVM
#ccache = false

# If an external LLVM root is specified, we automatically check the version by
# default to make sure it's within the range that we're expecting, but setting
# this flag will indicate that this version check should not be done.
#version-check = false

# Link libstdc++ statically into the librustc_llvm instead of relying on a
# dynamic version to be available.
#static-libstdcpp = false

# Tell the LLVM build system to use Ninja instead of the platform default for
# the generated build system. This can sometimes be faster than make, for
# example.
#ninja = false

# =============================================================================
# General build configuration options
# =============================================================================
[build]

# Build triple for the original snapshot compiler. This must be a compiler that
# nightlies are already produced for. The current platform must be able to run
# binaries of this build triple and the nightly will be used to bootstrap the
# first compiler.
#build = "x86_64-unknown-linux-gnu"    # defaults to your host platform

# In addition to the build triple, other triples to produce full compiler
# toolchains for. Each of these triples will be bootstrapped from the build
# triple and then will continue to bootstrap themselves. This platform must
# currently be able to run all of the triples provided here.
#host = ["x86_64-unknown-linux-gnu"]   # defaults to just the build triple

# In addition to all host triples, other triples to produce the standard library
# for. Each host triple will be used to produce a copy of the standard library
# for each target triple.
#target = ["x86_64-unknown-linux-gnu"] # defaults to just the build triple

# Instead of downloading the src/nightlies.txt version of Cargo specified, use
# this Cargo binary instead to build all Rust code
#cargo = "/path/to/bin/cargo"

# Instead of downloading the src/nightlies.txt version of the compiler
# specified, use this rustc binary instead as the stage0 snapshot compiler.
#rustc = "/path/to/bin/rustc"

# Flag to specify whether any documentation is built. If false, rustdoc and
# friends will still be compiled but they will not be used to generate any
# documentation.
#docs = true

# Indicate whether the compiler should be documented in addition to the standard
# library and facade crates.
#compiler-docs = false

# =============================================================================
# Options for compiling Rust code itself
# =============================================================================
[rust]

# Whether or not to optimize the compiler and standard library
#optimize = true

# Number of codegen units to use for each compiler invocation. A value of 0
# means "the number of cores on this machine", and 1+ is passed through to the
# compiler.
#codegen-units = 1

# Whether or not debug assertions are enabled for the compiler and standard
# library
#debug-assertions = false

# Whether or not debuginfo is emitted
#debuginfo = false

# Whether or not jemalloc is built and enabled
#use-jemalloc = true

# Whether or not jemalloc is built with its debug option set
#debug-jemalloc = false

# The default linker that will be used by the generated compiler. Note that this
# is not the linker used to link said compiler.
#default-linker = "cc"

# The default ar utility that will be used by the generated compiler if LLVM
# cannot be used. Note that this is not used to assemble said compiler.
#default-ar = "ar"

# The "channel" for the Rust build to produce. The stable/beta channels only
# allow using stable features, whereas the nightly and dev channels allow using
# nightly features
#channel = "dev"

# The root location of the MUSL installation directory. The library directory
# will also need to contain libunwind.a for an unwinding implementation.
#musl-root = "..."

# By default the `rustc` executable is built with `-Wl,-rpath` flags on Unix
# platforms to ensure that the compiler is usable by default from the build
# directory (as it links to a number of dynamic libraries). This may not be
# desired in distributions, for example.
#rpath = true

# =============================================================================
# Options for specific targets
#
# Each of the following options is scoped to the specific target triple in
# question and is used for determining how to compile each target.
# =============================================================================
[target.x86_64-unknown-linux-gnu]

# C compiler to be used to compiler C code and link Rust code. Note that the
# default value is platform specific, and if not specified it may also depend on
# what platform is crossing to what platform.
#cc = "cc"

# C++ compiler to be used to compiler C++ code (e.g. LLVM and our LLVM shims).
# This is only used for host targets.
#cxx = "c++"

# Path to the `llvm-config` binary of the installation of a custom LLVM to link
# against. Note that if this is specifed we don't compile LLVM at all for this
# target.
#llvm-config = "../path/to/llvm/root/bin/llvm-config"

# Path to the custom jemalloc static library to link into the standard library
# by default. This is only used if jemalloc is still enabled above
#jemalloc = "/path/to/jemalloc/libjemalloc_pic.a"

# If this target is for Android, this option will be required to specify where
# the NDK for the target lives. This is used to find the C compiler to link and
# build native code.
#android-ndk = "/path/to/ndk"