Rules Foreign CC

boost_build
cmake
cmake_tool
configure_make
ForeignCcArtifactInfo
ForeignCcDepsInfo
make
make_tool
native_tool_toolchain
ninja
ninja_tool
rules_foreign_cc_dependencies
ToolInfo

boost_build

boost_build(name, additional_inputs, additional_tools, alwayslink, bootstrap_options, build_data,
            data, defines, deps, env, lib_name, lib_source, linkopts, out_bin_dir, out_binaries,
            out_data_dirs, out_headers_only, out_include_dir, out_interface_libs, out_lib_dir,
            out_shared_libs, out_static_libs, postfix_script, tool_prefix, tools_deps, user_options)

Rule for building Boost. Invokes bootstrap.sh and then b2 install.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
additional_inputs	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
additional_tools	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
alwayslink	Optional. if true, link all the object files from the static library, even if they are not used.	Boolean	optional	False
bootstrap_options	any additional flags to pass to bootstrap.sh	List of strings	optional	[]
build_data	Files needed by this rule only during build/compile time. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
data	Files needed by this rule at runtime. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
defines	Optional compilation definitions to be passed to the dependencies of this library. They are NOT passed to the compiler, you should duplicate them in the configuration options.	List of strings	optional	[]
deps	Optional dependencies to be copied into the directory structure. Typically those directly required for the external building of the library/binaries. (i.e. those that the external buidl system will be looking for and paths to which are provided by the calling rule)	List of labels	optional	[]
env	Environment variables to set during the build. `$(execpath)` macros may be used to point at files which are listed as `data`, `deps`, or `build_data`, but unlike with other rules, these will be replaced with absolute paths to those files, because the build does not run in the exec root. No other macros are supported.	Dictionary: String -> String	optional	{}
lib_name	Library name. Defines the name of the install directory and the name of the static library, if no output files parameters are defined (any of static_libraries, shared_libraries, interface_libraries, binaries_names) Optional. If not defined, defaults to the target's name.	String	optional	""
lib_source	Label with source code to build. Typically a filegroup for the source of remote repository. Mandatory.	Label	required
linkopts	Optional link options to be passed up to the dependencies of this library	List of strings	optional	[]
out_bin_dir	Optional name of the output subdirectory with the binary files, defaults to 'bin'.	String	optional	"bin"
out_binaries	Optional names of the resulting binaries.	List of strings	optional	[]
out_data_dirs	Optional names of additional directories created by the build that should be declared as bazel action outputs	List of strings	optional	[]
out_headers_only	Flag variable to indicate that the library produces only headers	Boolean	optional	False
out_include_dir	Optional name of the output subdirectory with the header files, defaults to 'include'.	String	optional	"include"
out_interface_libs	Optional names of the resulting interface libraries.	List of strings	optional	[]
out_lib_dir	Optional name of the output subdirectory with the library files, defaults to 'lib'.	String	optional	"lib"
out_shared_libs	Optional names of the resulting shared libraries.	List of strings	optional	[]
out_static_libs	Optional names of the resulting static libraries. Note that if `out_headers_only`, `out_static_libs`, `out_shared_libs`, and `out_binaries` are not set, default `lib_name.a`/`lib_name.lib` static library is assumed	List of strings	optional	[]
postfix_script	Optional part of the shell script to be added after the make commands	String	optional	""
tool_prefix	A prefix for build commands	String	optional	""
tools_deps	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
user_options	any additional flags to pass to b2	List of strings	optional	[]

cmake

cmake(name, additional_inputs, additional_tools, alwayslink, build_args, build_data, cache_entries,
      data, defines, deps, env, generate_args, generate_crosstool_file, install, install_args,
      lib_name, lib_source, linkopts, out_bin_dir, out_binaries, out_data_dirs, out_headers_only,
      out_include_dir, out_interface_libs, out_lib_dir, out_shared_libs, out_static_libs,
      postfix_script, targets, tool_prefix, tools_deps, working_directory)

Rule for building external library with CMake.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
additional_inputs	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
additional_tools	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
alwayslink	Optional. if true, link all the object files from the static library, even if they are not used.	Boolean	optional	False
build_args	Arguments for the CMake build command	List of strings	optional	[]
build_data	Files needed by this rule only during build/compile time. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
cache_entries	CMake cache entries to initialize (they will be passed with `-Dkey=value`) Values, defined by the toolchain, will be joined with the values, passed here. (Toolchain values come first)	Dictionary: String -> String	optional	{}
data	Files needed by this rule at runtime. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
defines	Optional compilation definitions to be passed to the dependencies of this library. They are NOT passed to the compiler, you should duplicate them in the configuration options.	List of strings	optional	[]
deps	Optional dependencies to be copied into the directory structure. Typically those directly required for the external building of the library/binaries. (i.e. those that the external buidl system will be looking for and paths to which are provided by the calling rule)	List of labels	optional	[]
env	Environment variables to set during the build. `$(execpath)` macros may be used to point at files which are listed as `data`, `deps`, or `build_data`, but unlike with other rules, these will be replaced with absolute paths to those files, because the build does not run in the exec root. No other macros are supported.	Dictionary: String -> String	optional	{}
generate_args	Arguments for CMake's generate command. Arguments should be passed as key/value pairs. eg: `["-G Ninja", "--debug-output", "-DFOO=bar"]`. Note that unless a generator (`-G`) argument is provided, the default generators are Unix Makefiles for Linux and MacOS and Ninja for Windows.	List of strings	optional	[]
generate_crosstool_file	When True, CMake crosstool file will be generated from the toolchain values, provided cache-entries and env_vars (some values will still be passed as `-Dkey=value` and environment variables). If `CMAKE_TOOLCHAIN_FILE` cache entry is passed, specified crosstool file will be used When using this option to cross-compile, it is required to specify `CMAKE_SYSTEM_NAME` in the cache_entries	Boolean	optional	True
install	If True, the `cmake --install` comand will be performed after a build	Boolean	optional	True
install_args	Arguments for the CMake install command	List of strings	optional	[]
lib_name	Library name. Defines the name of the install directory and the name of the static library, if no output files parameters are defined (any of static_libraries, shared_libraries, interface_libraries, binaries_names) Optional. If not defined, defaults to the target's name.	String	optional	""
lib_source	Label with source code to build. Typically a filegroup for the source of remote repository. Mandatory.	Label	required
linkopts	Optional link options to be passed up to the dependencies of this library	List of strings	optional	[]
out_bin_dir	Optional name of the output subdirectory with the binary files, defaults to 'bin'.	String	optional	"bin"
out_binaries	Optional names of the resulting binaries.	List of strings	optional	[]
out_data_dirs	Optional names of additional directories created by the build that should be declared as bazel action outputs	List of strings	optional	[]
out_headers_only	Flag variable to indicate that the library produces only headers	Boolean	optional	False
out_include_dir	Optional name of the output subdirectory with the header files, defaults to 'include'.	String	optional	"include"
out_interface_libs	Optional names of the resulting interface libraries.	List of strings	optional	[]
out_lib_dir	Optional name of the output subdirectory with the library files, defaults to 'lib'.	String	optional	"lib"
out_shared_libs	Optional names of the resulting shared libraries.	List of strings	optional	[]
out_static_libs	Optional names of the resulting static libraries. Note that if `out_headers_only`, `out_static_libs`, `out_shared_libs`, and `out_binaries` are not set, default `lib_name.a`/`lib_name.lib` static library is assumed	List of strings	optional	[]
postfix_script	Optional part of the shell script to be added after the make commands	String	optional	""
targets	A list of targets with in the foreign build system to produce. An empty string (`""`) will result in a call to the underlying build system with no explicit target set	List of strings	optional	[]
tool_prefix	A prefix for build commands	String	optional	""
tools_deps	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
working_directory	Working directory, with the main CMakeLists.txt (otherwise, the top directory of the lib_source label files is used.)	String	optional	""

cmake_tool

cmake_tool(name, srcs)

Rule for building CMake. Invokes bootstrap script and make install.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
srcs	The target containing the build tool's sources	Label	required

configure_make

configure_make(name, additional_inputs, additional_tools, alwayslink, args, autoconf,
               autoconf_options, autogen, autogen_command, autogen_options, autoreconf,
               autoreconf_options, build_data, configure_command, configure_in_place,
               configure_options, configure_prefix, data, defines, deps, env, install_prefix,
               lib_name, lib_source, linkopts, out_bin_dir, out_binaries, out_data_dirs,
               out_headers_only, out_include_dir, out_interface_libs, out_lib_dir, out_shared_libs,
               out_static_libs, postfix_script, targets, tool_prefix, tools_deps)

Rule for building external libraries with configure-make pattern. Some 'configure' script is invoked with --prefix=install (by default), and other parameters for compilation and linking, taken from Bazel C/C++ toolchain and passed dependencies. After configuration, GNU Make is called.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
additional_inputs	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
additional_tools	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
alwayslink	Optional. if true, link all the object files from the static library, even if they are not used.	Boolean	optional	False
args	A list of arguments to pass to the call to `make`	List of strings	optional	[]
autoconf	Set to True if 'autoconf' should be invoked before 'configure', currently requires `configure_in_place` to be True.	Boolean	optional	False
autoconf_options	Any options to be put in the 'autoconf.sh' command line.	List of strings	optional	[]
autogen	Set to True if 'autogen.sh' should be invoked before 'configure', currently requires `configure_in_place` to be True.	Boolean	optional	False
autogen_command	The name of the autogen script file, default: autogen.sh. Many projects use autogen.sh however the Autotools FAQ recommends bootstrap so we provide this option to support that.	String	optional	"autogen.sh"
autogen_options	Any options to be put in the 'autogen.sh' command line.	List of strings	optional	[]
autoreconf	Set to True if 'autoreconf' should be invoked before 'configure.', currently requires `configure_in_place` to be True.	Boolean	optional	False
autoreconf_options	Any options to be put in the 'autoreconf.sh' command line.	List of strings	optional	[]
build_data	Files needed by this rule only during build/compile time. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
configure_command	The name of the configuration script file, default: configure. The file must be in the root of the source directory.	String	optional	"configure"
configure_in_place	Set to True if 'configure' should be invoked in place, i.e. from its enclosing directory.	Boolean	optional	False
configure_options	Any options to be put on the 'configure' command line.	List of strings	optional	[]
configure_prefix	A prefix for the call to the `configure_command`.	String	optional	""
data	Files needed by this rule at runtime. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
defines	Optional compilation definitions to be passed to the dependencies of this library. They are NOT passed to the compiler, you should duplicate them in the configuration options.	List of strings	optional	[]
deps	Optional dependencies to be copied into the directory structure. Typically those directly required for the external building of the library/binaries. (i.e. those that the external buidl system will be looking for and paths to which are provided by the calling rule)	List of labels	optional	[]
env	Environment variables to set during the build. `$(execpath)` macros may be used to point at files which are listed as `data`, `deps`, or `build_data`, but unlike with other rules, these will be replaced with absolute paths to those files, because the build does not run in the exec root. No other macros are supported.	Dictionary: String -> String	optional	{}
install_prefix	Install prefix, i.e. relative path to where to install the result of the build. Passed to the 'configure' script with --prefix flag.	String	optional	""
lib_name	Library name. Defines the name of the install directory and the name of the static library, if no output files parameters are defined (any of static_libraries, shared_libraries, interface_libraries, binaries_names) Optional. If not defined, defaults to the target's name.	String	optional	""
lib_source	Label with source code to build. Typically a filegroup for the source of remote repository. Mandatory.	Label	required
linkopts	Optional link options to be passed up to the dependencies of this library	List of strings	optional	[]
out_bin_dir	Optional name of the output subdirectory with the binary files, defaults to 'bin'.	String	optional	"bin"
out_binaries	Optional names of the resulting binaries.	List of strings	optional	[]
out_data_dirs	Optional names of additional directories created by the build that should be declared as bazel action outputs	List of strings	optional	[]
out_headers_only	Flag variable to indicate that the library produces only headers	Boolean	optional	False
out_include_dir	Optional name of the output subdirectory with the header files, defaults to 'include'.	String	optional	"include"
out_interface_libs	Optional names of the resulting interface libraries.	List of strings	optional	[]
out_lib_dir	Optional name of the output subdirectory with the library files, defaults to 'lib'.	String	optional	"lib"
out_shared_libs	Optional names of the resulting shared libraries.	List of strings	optional	[]
out_static_libs	Optional names of the resulting static libraries. Note that if `out_headers_only`, `out_static_libs`, `out_shared_libs`, and `out_binaries` are not set, default `lib_name.a`/`lib_name.lib` static library is assumed	List of strings	optional	[]
postfix_script	Optional part of the shell script to be added after the make commands	String	optional	""
targets	A list of targets within the foreign build system to produce. An empty string (`""`) will result in a call to the underlying build system with no explicit target set	List of strings	optional	["", "install"]
tool_prefix	A prefix for build commands	String	optional	""
tools_deps	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]

make

make(name, additional_inputs, additional_tools, alwayslink, args, build_data, data, defines, deps,
     env, lib_name, lib_source, linkopts, out_bin_dir, out_binaries, out_data_dirs, out_headers_only,
     out_include_dir, out_interface_libs, out_lib_dir, out_shared_libs, out_static_libs,
     postfix_script, targets, tool_prefix, tools_deps)

Rule for building external libraries with GNU Make. GNU Make commands (make and make install by default) are invoked with prefix="install" (by default), and other environment variables for compilation and linking, taken from Bazel C/C++ toolchain and passed dependencies.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
additional_inputs	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
additional_tools	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
alwayslink	Optional. if true, link all the object files from the static library, even if they are not used.	Boolean	optional	False
args	A list of arguments to pass to the call to `make`	List of strings	optional	[]
build_data	Files needed by this rule only during build/compile time. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
data	Files needed by this rule at runtime. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
defines	Optional compilation definitions to be passed to the dependencies of this library. They are NOT passed to the compiler, you should duplicate them in the configuration options.	List of strings	optional	[]
deps	Optional dependencies to be copied into the directory structure. Typically those directly required for the external building of the library/binaries. (i.e. those that the external buidl system will be looking for and paths to which are provided by the calling rule)	List of labels	optional	[]
env	Environment variables to set during the build. `$(execpath)` macros may be used to point at files which are listed as `data`, `deps`, or `build_data`, but unlike with other rules, these will be replaced with absolute paths to those files, because the build does not run in the exec root. No other macros are supported.	Dictionary: String -> String	optional	{}
lib_name	Library name. Defines the name of the install directory and the name of the static library, if no output files parameters are defined (any of static_libraries, shared_libraries, interface_libraries, binaries_names) Optional. If not defined, defaults to the target's name.	String	optional	""
lib_source	Label with source code to build. Typically a filegroup for the source of remote repository. Mandatory.	Label	required
linkopts	Optional link options to be passed up to the dependencies of this library	List of strings	optional	[]
out_bin_dir	Optional name of the output subdirectory with the binary files, defaults to 'bin'.	String	optional	"bin"
out_binaries	Optional names of the resulting binaries.	List of strings	optional	[]
out_data_dirs	Optional names of additional directories created by the build that should be declared as bazel action outputs	List of strings	optional	[]
out_headers_only	Flag variable to indicate that the library produces only headers	Boolean	optional	False
out_include_dir	Optional name of the output subdirectory with the header files, defaults to 'include'.	String	optional	"include"
out_interface_libs	Optional names of the resulting interface libraries.	List of strings	optional	[]
out_lib_dir	Optional name of the output subdirectory with the library files, defaults to 'lib'.	String	optional	"lib"
out_shared_libs	Optional names of the resulting shared libraries.	List of strings	optional	[]
out_static_libs	Optional names of the resulting static libraries. Note that if `out_headers_only`, `out_static_libs`, `out_shared_libs`, and `out_binaries` are not set, default `lib_name.a`/`lib_name.lib` static library is assumed	List of strings	optional	[]
postfix_script	Optional part of the shell script to be added after the make commands	String	optional	""
targets	A list of targets within the foreign build system to produce. An empty string (`""`) will result in a call to the underlying build system with no explicit target set	List of strings	optional	["", "install"]
tool_prefix	A prefix for build commands	String	optional	""
tools_deps	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]

make_tool

make_tool(name, srcs)

Rule for building Make. Invokes configure script and make install.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
srcs	The target containing the build tool's sources	Label	required

native_tool_toolchain

native_tool_toolchain(name, path, target)

Rule for defining the toolchain data of the native tools (cmake, ninja), to be used by rules_foreign_cc with toolchain types @rules_foreign_cc//toolchains:cmake_toolchain and @rules_foreign_cc//toolchains:ninja_toolchain.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
path	Absolute path to the tool in case the tool is preinstalled on the machine. Relative path to the tool in case the tool is built as part of a build; the path should be relative to the bazel-genfiles, i.e. it should start with the name of the top directory of the built tree artifact. (Please see the example `//examples:built_cmake_toolchain`)	String	optional	""
target	If the tool is preinstalled, must be None. If the tool is built as part of the build, the corresponding build target, which should produce the tree artifact with the binary to call.	Label	optional	None

ninja

ninja(name, additional_inputs, additional_tools, alwayslink, args, build_data, data, defines, deps,
      directory, env, lib_name, lib_source, linkopts, out_bin_dir, out_binaries, out_data_dirs,
      out_headers_only, out_include_dir, out_interface_libs, out_lib_dir, out_shared_libs,
      out_static_libs, postfix_script, targets, tool_prefix, tools_deps)

Rule for building external libraries with Ninja.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
additional_inputs	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
additional_tools	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]
alwayslink	Optional. if true, link all the object files from the static library, even if they are not used.	Boolean	optional	False
args	A list of arguments to pass to the call to `ninja`	List of strings	optional	[]
build_data	Files needed by this rule only during build/compile time. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
data	Files needed by this rule at runtime. May list file or rule targets. Generally allows any target.	List of labels	optional	[]
defines	Optional compilation definitions to be passed to the dependencies of this library. They are NOT passed to the compiler, you should duplicate them in the configuration options.	List of strings	optional	[]
deps	Optional dependencies to be copied into the directory structure. Typically those directly required for the external building of the library/binaries. (i.e. those that the external buidl system will be looking for and paths to which are provided by the calling rule)	List of labels	optional	[]
directory	A directory to pass as the `-C` argument. The rule will always use the root directory of the `lib_sources` attribute if this attribute is not set	String	optional	""
env	Environment variables to set during the build. `$(execpath)` macros may be used to point at files which are listed as `data`, `deps`, or `build_data`, but unlike with other rules, these will be replaced with absolute paths to those files, because the build does not run in the exec root. No other macros are supported.	Dictionary: String -> String	optional	{}
lib_name	Library name. Defines the name of the install directory and the name of the static library, if no output files parameters are defined (any of static_libraries, shared_libraries, interface_libraries, binaries_names) Optional. If not defined, defaults to the target's name.	String	optional	""
lib_source	Label with source code to build. Typically a filegroup for the source of remote repository. Mandatory.	Label	required
linkopts	Optional link options to be passed up to the dependencies of this library	List of strings	optional	[]
out_bin_dir	Optional name of the output subdirectory with the binary files, defaults to 'bin'.	String	optional	"bin"
out_binaries	Optional names of the resulting binaries.	List of strings	optional	[]
out_data_dirs	Optional names of additional directories created by the build that should be declared as bazel action outputs	List of strings	optional	[]
out_headers_only	Flag variable to indicate that the library produces only headers	Boolean	optional	False
out_include_dir	Optional name of the output subdirectory with the header files, defaults to 'include'.	String	optional	"include"
out_interface_libs	Optional names of the resulting interface libraries.	List of strings	optional	[]
out_lib_dir	Optional name of the output subdirectory with the library files, defaults to 'lib'.	String	optional	"lib"
out_shared_libs	Optional names of the resulting shared libraries.	List of strings	optional	[]
out_static_libs	Optional names of the resulting static libraries. Note that if `out_headers_only`, `out_static_libs`, `out_shared_libs`, and `out_binaries` are not set, default `lib_name.a`/`lib_name.lib` static library is assumed	List of strings	optional	[]
postfix_script	Optional part of the shell script to be added after the make commands	String	optional	""
targets	A list of targets with in the foreign build system to produce. An empty string (`""`) will result in a call to the underlying build system with no explicit target set	List of strings	optional	[]
tool_prefix	A prefix for build commands	String	optional	""
tools_deps	deprecated: Please use the `build_data` attribute.	List of labels	optional	[]

ninja_tool

ninja_tool(name, srcs)

Rule for building Ninja. Invokes configure script.

ATTRIBUTES

Name	Description	Type	Mandatory	Default
name	A unique name for this target.	Name	required
srcs	The target containing the build tool's sources	Label	required

ForeignCcArtifactInfo

ForeignCcArtifactInfo(bin_dir_name, gen_dir, include_dir_name, lib_dir_name)

Groups information about the external library install directory, and relative bin, include and lib directories.

Serves to pass transitive information about externally built artifacts up the dependency chain.

Can not be used as a top-level provider. Instances of ForeignCcArtifactInfo are encapsulated in a depset ForeignCcDepsInfo::artifacts.

FIELDS

Name	Description
bin_dir_name	Bin directory, relative to install directory
gen_dir	Install directory
include_dir_name	Include directory, relative to install directory
lib_dir_name	Lib directory, relative to install directory

ForeignCcDepsInfo

ForeignCcDepsInfo(artifacts)

Provider to pass transitive information about external libraries.

FIELDS

Name	Description
artifacts	Depset of ForeignCcArtifactInfo

ToolInfo

ToolInfo(path, target)

Information about the native tool

FIELDS

Name	Description
path	Absolute path to the tool in case the tool is preinstalled on the machine. Relative path to the tool in case the tool is built as part of a build; the path should be relative to the bazel-genfiles, i.e. it should start with the name of the top directory of the built tree artifact. (Please see the example `//examples:built_cmake_toolchain`)
target	If the tool is preinstalled, must be None. If the tool is built as part of the build, the corresponding build target, which should produce the tree artifact with the binary to call.

rules_foreign_cc_dependencies

rules_foreign_cc_dependencies(native_tools_toolchains, register_default_tools, cmake_version,
                              make_version, ninja_version, register_preinstalled_tools,
                              register_built_tools)

Call this function from the WORKSPACE file to initialize rules_foreign_cc dependencies and let neccesary code generation happen (Code generation is needed to support different variants of the C++ Starlark API.).

PARAMETERS

Name	Description	Default Value
native_tools_toolchains	pass the toolchains for toolchain types '@rules_foreign_cc//toolchains:cmake_toolchain' and '@rules_foreign_cc//toolchains:ninja_toolchain' with the needed platform constraints. If you do not pass anything, registered default toolchains will be selected (see below).	`[]`
register_default_tools	If True, the cmake and ninja toolchains, calling corresponding preinstalled binaries by name (cmake, ninja) will be registered after 'native_tools_toolchains' without any platform constraints. The default is True.	`True`
cmake_version	The target version of the cmake toolchain if `register_default_tools` or `register_built_tools` is set to `True`.	`"3.20.4"`
make_version	The target version of the default make toolchain if `register_built_tools` is set to `True`.	`"4.3"`
ninja_version	The target version of the ninja toolchain if `register_default_tools` or `register_built_tools` is set to `True`.	`"1.10.2"`
register_preinstalled_tools	If true, toolchains will be registered for the native built tools installed on the exec host	`True`
register_built_tools	If true, toolchains that build the tools from source are registered	`True`

Rules ForeignCc