C / C++ Rules

Rules

• cc_binary
• cc_import
• cc_library
• cc_proto_library
• fdo_prefetch_hints
• fdo_profile
• propeller_optimize
• cc_test
• cc_toolchain
• cc_toolchain_suite

cc_binary

cc_binary(name, deps, srcs, data, additional_linker_inputs, args, compatible_with, copts, defines, deprecation, distribs, env, exec_compatible_with, exec_properties, features, includes, licenses, linkopts, linkshared, linkstatic, local_defines, malloc, nocopts, output_licenses, restricted_to, stamp, tags, target_compatible_with, testonly, toolchains, visibility, win_def_file)

Implicit output targets

• name.stripped (only built if explicitly requested): A stripped version of the binary. strip -g is run on the binary to remove debug symbols. Additional strip options can be provided on the command line using --stripopt=-foo. This output is only built if explicitly requested.
• name.dwp (only built if explicitly requested): If Fission is enabled: a debug information package file suitable for debugging remotely deployed binaries. Else: an empty file.

Arguments

Attributes
name	Name; required A unique name for this target.
deps	List of labels; optional The list of other libraries to be linked in to the binary target. These can be cc_library or objc_library targets.
srcs	List of labels; optional The list of C and C++ files that are processed to create the target. These are C/C++ source and header files, either non-generated (normal source code) or generated. All .cc, .c, and .cpp files will be compiled. These might be generated files: if a named file is in the outs of some other rule, this rule will automatically depend on that other rule. A .h file will not be compiled, but will be available for inclusion by sources in this rule. Both .cc and .h files can directly include headers listed in these srcs or in the hdrs of any rule listed in the deps argument. All #included files must be mentioned in the srcs attribute of this rule, or in the hdrs attribute of referenced cc_library()s. The recommended style is for headers associated with a library to be listed in that library's hdrs attribute, and any remaining headers associated with this rule's sources to be listed in srcs. See "Header inclusion checking" for a more detailed description. If a rule's name is in the srcs, then this rule automatically depends on that one. If the named rule's outs are C or C++ source files, they are compiled into this rule; if they are library files, they are linked in. Permitted srcs file types: C and C++ source files: .c, .cc, .cpp, .cxx, .c++, .C C and C++ header files: .h, .hh, .hpp, .hxx, .inc, .inl, .H Assembler with C preprocessor: .S Archive: .a, .pic.a "Always link" library: .lo, .pic.lo Shared library, versioned or unversioned: .so, .so.version Object file: .o, .pic.o ...and any rules that produce those files. Different extensions denote different programming languages in accordance with gcc convention.
additional_linker_inputs	List of labels; optional Pass these files to the C++ linker command. For example, compiled Windows .res files can be provided here to be embedded in the binary target.
copts	List of strings; optional Add these options to the C++ compilation command. Subject to "Make variable" substitution and Bourne shell tokenization. Each string in this attribute is added in the given order to COPTS before compiling the binary target. The flags take effect only for compiling this target, not its dependencies, so be careful about header files included elsewhere. All paths should be relative to the workspace, not to the current package. If the package declares the feature no_copts_tokenization, Bourne shell tokenization applies only to strings that consist of a single "Make" variable.
defines	List of strings; optional List of defines to add to the compile line. Subject to "Make" variable substitution and Bourne shell tokenization. Each string, which must consist of a single Bourne shell token, is prepended with -D and added to the compile command line to this target, as well as to every rule that depends on it. Be very careful, since this may have far-reaching effects. When in doubt, add define values to local_defines instead.
includes	List of strings; optional List of include dirs to be added to the compile line. Subject to "Make variable" substitution. Each string is prepended with -isystem and added to COPTS. Unlike COPTS, these flags are added for this rule and every rule that depends on it. (Note: not the rules it depends upon!) Be very careful, since this may have far-reaching effects. When in doubt, add "-I" flags to COPTS instead. Headers must be added to srcs or hdrs, otherwise they will not be available to dependent rules when compilation is sandboxed (the default).
linkopts	List of strings; optional Add these flags to the C++ linker command. Subject to "Make" variable substitution, Bourne shell tokenization and label expansion. Each string in this attribute is added to LINKOPTS before linking the binary target. Each element of this list that does not start with $ or - is assumed to be the label of a target in deps. The list of files generated by that target is appended to the linker options. An error is reported if the label is invalid, or is not declared in deps.
linkshared	Boolean; optional; nonconfigurable; default is False Create a shared library. To enable this attribute, include linkshared=True in your rule. By default this option is off. The presence of this flag means that linking occurs with the -shared flag to gcc, and the resulting shared library is suitable for loading into for example a Java program. However, for build purposes it will never be linked into the dependent binary, as it is assumed that shared libraries built with a cc_binary rule are only loaded manually by other programs, so it should not be considered a substitute for the cc_library rule. For sake of scalability we recommend avoiding this approach altogether and simply letting java_library depend on cc_library rules instead. If you specify both linkopts=['-static'] and linkshared=True, you get a single completely self-contained unit. If you specify both linkstatic=True and linkshared=True, you get a single, mostly self-contained unit.
linkstatic	Boolean; optional; default is True For cc_binary and cc_test: link the binary in static mode. For cc_library.linkstatic: see below. By default this option is on for cc_binary and off for the rest. If enabled and this is a binary or test, this option tells the build tool to link in .a's instead of .so's for user libraries whenever possible. Some system libraries may still be linked dynamically, as are libraries for which there is no static library. So the resulting executable will still be dynamically linked, hence only mostly static. There are really three different ways to link an executable: STATIC with fully_static_link feature, in which everything is linked statically; e.g. "gcc -static foo.o libbar.a libbaz.a -lm". This mode is enabled by specifying fully_static_link in the features attribute. STATIC, in which all user libraries are linked statically (if a static version is available), but where system libraries (excluding C/C++ runtime libraries) are linked dynamically, e.g. "gcc foo.o libfoo.a libbaz.a -lm". This mode is enabled by specifying linkstatic=True. DYNAMIC, in which all libraries are linked dynamically (if a dynamic version is available), e.g. "gcc foo.o libfoo.so libbaz.so -lm". This mode is enabled by specifying linkstatic=False. The linkstatic attribute has a different meaning if used on a cc_library() rule. For a C++ library, linkstatic=True indicates that only static linking is allowed, so no .so will be produced. linkstatic=False does not prevent static libraries from being created. The attribute is meant to control the creation of dynamic libraries. If linkstatic=False, then the build tool will create symlinks to depended-upon shared libraries in the *.runfiles area.
local_defines	List of strings; optional List of defines to add to the compile line. Subject to "Make" variable substitution and Bourne shell tokenization. Each string, which must consist of a single Bourne shell token, is prepended with -D and added to the compile command line for this target, but not to its dependents.
malloc	Label; optional; default is @bazel_tools//tools/cpp:malloc Override the default dependency on malloc. By default, C++ binaries are linked against //tools/cpp:malloc, which is an empty library so the binary ends up using libc malloc. This label must refer to a cc_library. If compilation is for a non-C++ rule, this option has no effect. The value of this attribute is ignored if linkshared=True is specified.
nocopts	String; optional Remove matching options from the C++ compilation command. Subject to "Make" variable substitution. The value of this attribute is interpreted as a regular expression. Any preexisting COPTS that match this regular expression (including values explicitly specified in the rule's copts attribute) will be removed from COPTS for purposes of compiling this rule. This attribute should rarely be needed.
stamp	Integer; optional; default is -1 Whether to encode build information into the binary. Possible values: stamp = 1: Always stamp the build information into the binary, even in --nostamp builds. This setting should be avoided, since it potentially kills remote caching for the binary and any downstream actions that depend on it. stamp = 0: Always replace build information by constant values. This gives good build result caching. stamp = -1: Embedding of build information is controlled by the --[no]stamp flag. Stamped binaries are not rebuilt unless their dependencies change.
win_def_file	Label; optional The Windows DEF file to be passed to linker. This attribute should only be used when Windows is the target platform. It can be used to export symbols during linking a shared library.

cc_import

cc_import(name, data, hdrs, alwayslink, compatible_with, deprecation, distribs, features, interface_library, licenses, restricted_to, shared_library, static_library, system_provided, tags, target_compatible_with, testonly, visibility)

cc_import rules allows users to import precompiled C/C++ libraries.

The following are the typical use cases:
1. Linking a static library

cc_import(
  name = "mylib",
  hdrs = ["mylib.h"],
  static_library = "libmylib.a",
  # If alwayslink is turned on,
  # libmylib.a will be forcely linked into any binary that depends on it.
  # alwayslink = 1,
)

2. Linking a shared library (Unix)

cc_import(
  name = "mylib",
  hdrs = ["mylib.h"],
  shared_library = "libmylib.so",
)

3. Linking a shared library with interface library (Windows)

cc_import(
  name = "mylib",
  hdrs = ["mylib.h"],
  # mylib.lib is a import library for mylib.dll which will be passed to linker
  interface_library = "mylib.lib",
  # mylib.dll will be available for runtime
  shared_library = "mylib.dll",
)

4. Linking a shared library with system_provided=True (Windows)

cc_import(
  name = "mylib",
  hdrs = ["mylib.h"],
  # mylib.lib is an import library for mylib.dll which will be passed to linker
  interface_library = "mylib.lib",
  # mylib.dll is provided by system environment, for example it can be found in PATH.
  # This indicates that Bazel is not responsible for making mylib.dll available.
  system_provided = 1,
)

5. Linking to static or shared library
On Unix:

cc_import(
  name = "mylib",
  hdrs = ["mylib.h"],
  static_library = "libmylib.a",
  shared_library = "libmylib.so",
)

# first will link to libmylib.a
cc_binary(
  name = "first",
  srcs = ["first.cc"],
  deps = [":mylib"],
  linkstatic = 1, # default value
)

# second will link to libmylib.so
cc_binary(
  name = "second",
  srcs = ["second.cc"],
  deps = [":mylib"],
  linkstatic = 0,
)

On Windows:

cc_import(
  name = "mylib",
  hdrs = ["mylib.h"],
  static_library = "libmylib.lib", # A normal static library
  interface_library = "mylib.lib", # An import library for mylib.dll
  shared_library = "mylib.dll",
)

# first will link to libmylib.lib
cc_binary(
  name = "first",
  srcs = ["first.cc"],
  deps = [":mylib"],
  linkstatic = 1, # default value
)

# second will link to mylib.dll through mylib.lib
cc_binary(
  name = "second",
  srcs = ["second.cc"],
  deps = [":mylib"],
  linkstatic = 0,
)

Arguments

Attributes
name	Name; required A unique name for this target.
hdrs	List of labels; optional The list of header files published by this precompiled library to be directly included by sources in dependent rules.
alwayslink	Boolean; optional; default is False If 1, any binary that depends (directly or indirectly) on this C++ precompiled library will link in all the object files archived in the static library, even if some contain no symbols referenced by the binary. This is useful if your code isn't explicitly called by code in the binary, e.g., if your code registers to receive some callback provided by some service. If alwayslink doesn't work with VS 2017 on Windows, that is due to a known issue, please upgrade your VS 2017 to the latest version.
interface_library	Label; optional A single interface library for linking the shared library. Permitted file types: .ifso, .tbd, .lib, .so or .dylib
shared_library	Label; optional A single precompiled shared library. Bazel ensures it is available to the binary that depends on it during runtime. Permitted file types: .so, .dll or .dylib
static_library	Label; optional A single precompiled static library. Permitted file types: .a, .pic.a or .lib
system_provided	Boolean; optional; default is False If 1, it indicates the shared library required at runtime is provided by the system. In this case, interface_library should be specified and shared_library should be empty.

cc_library

cc_library(name, deps, srcs, data, hdrs, alwayslink, compatible_with, copts, defines, deprecation, distribs, exec_compatible_with, exec_properties, features, implementation_deps, include_prefix, includes, licenses, linkopts, linkstamp, linkstatic, local_defines, nocopts, restricted_to, strip_include_prefix, tags, target_compatible_with, testonly, textual_hdrs, toolchains, visibility, win_def_file)

Header inclusion checking

All header files that are used in the build must be declared in the hdrs or srcs of cc_* rules. This is enforced.

For cc_library rules, headers in hdrs comprise the public interface of the library and can be directly included both from the files in hdrs and srcs of the library itself as well as from files in hdrs and srcs of cc_* rules that list the library in their deps. Headers in srcs must only be directly included from the files in hdrs and srcs of the library itself. When deciding whether to put a header into hdrs or srcs, you should ask whether you want consumers of this library to be able to directly include it. This is roughly the same decision as between public and private visibility in programming languages.

cc_binary and cc_test rules do not have an exported interface, so they also do not have a hdrs attribute. All headers that belong to the binary or test directly should be listed in the srcs.

To illustrate these rules, look at the following example.

cc_binary(
    name = "foo",
    srcs = [
        "foo.cc",
        "foo.h",
    ],
    deps = [":bar"],
)

cc_library(
    name = "bar",
    srcs = [
        "bar.cc",
        "bar-impl.h",
    ],
    hdrs = ["bar.h"],
    deps = [":baz"],
)

cc_library(
    name = "baz",
    srcs = [
        "baz.cc",
        "baz-impl.h",
    ],
    hdrs = ["baz.h"],
)

The allowed direct inclusions in this example are listed in the table below. For example foo.cc is allowed to directly include foo.h and bar.h, but not baz.h.

Including file	Allowed inclusions
foo.h	bar.h
foo.cc	foo.h bar.h
bar.h	bar-impl.h baz.h
bar-impl.h	bar.h baz.h
bar.cc	bar.h bar-impl.h baz.h
baz.h	baz-impl.h
baz-impl.h	baz.h
baz.cc	baz.h baz-impl.h

The inclusion checking rules only apply to direct inclusions. In the example above foo.cc is allowed to include bar.h, which may include baz.h, which in turn is allowed to include baz-impl.h. Technically, the compilation of a .cc file may transitively include any header file in the hdrs or srcs in any cc_library in the transitive deps closure. In this case the compiler may read baz.h and baz-impl.h when compiling foo.cc, but foo.cc must not contain #include "baz.h". For that to be allowed, baz must be added to the deps of foo.

Unfortunately Bazel currently cannot distinguish between direct and transitive inclusions, so it cannot detect error cases where a file illegally includes a header directly that is only allowed to be included transitively. For example, Bazel would not complain if in the example above foo.cc directly includes baz.h. This would be illegal, because foo does not directly depend on baz. Currently, no error is produced in that case, but such error checking may be added in the future.

Arguments

Attributes
name	Name; required A unique name for this target.
deps	List of labels; optional The list of other libraries to be linked in to the binary target. These can be cc_library or objc_library targets.
srcs	List of labels; optional The list of C and C++ files that are processed to create the target. These are C/C++ source and header files, either non-generated (normal source code) or generated. All .cc, .c, and .cpp files will be compiled. These might be generated files: if a named file is in the outs of some other rule, this rule will automatically depend on that other rule. A .h file will not be compiled, but will be available for inclusion by sources in this rule. Both .cc and .h files can directly include headers listed in these srcs or in the hdrs of any rule listed in the deps argument. All #included files must be mentioned in the srcs attribute of this rule, or in the hdrs attribute of referenced cc_library()s. The recommended style is for headers associated with a library to be listed in that library's hdrs attribute, and any remaining headers associated with this rule's sources to be listed in srcs. See "Header inclusion checking" for a more detailed description. If a rule's name is in the srcs, then this rule automatically depends on that one. If the named rule's outs are C or C++ source files, they are compiled into this rule; if they are library files, they are linked in. Permitted srcs file types: C and C++ source files: .c, .cc, .cpp, .cxx, .c++, .C C and C++ header files: .h, .hh, .hpp, .hxx, .inc, .inl, .H Assembler with C preprocessor: .S Archive: .a, .pic.a "Always link" library: .lo, .pic.lo Shared library, versioned or unversioned: .so, .so.version Object file: .o, .pic.o ...and any rules that produce those files. Different extensions denote different programming languages in accordance with gcc convention.
hdrs	List of labels; optional The list of header files published by this library to be directly included by sources in dependent rules. This is the strongly preferred location for declaring header files that describe the interface for the library. These headers will be made available for inclusion by sources in this rule or in dependent rules. Headers not meant to be included by a client of this library should be listed in the srcs attribute instead, even if they are included by a published header. See "Header inclusion checking" for a more detailed description.
alwayslink	Boolean; optional; default is False If 1, any binary that depends (directly or indirectly) on this C++ library will link in all the object files for the files listed in srcs, even if some contain no symbols referenced by the binary. This is useful if your code isn't explicitly called by code in the binary, e.g., if your code registers to receive some callback provided by some service. If alwayslink doesn't work with VS 2017 on Windows, that is due to a known issue, please upgrade your VS 2017 to the latest version.
copts	List of strings; optional Add these options to the C++ compilation command. Subject to "Make variable" substitution and Bourne shell tokenization. Each string in this attribute is added in the given order to COPTS before compiling the binary target. The flags take effect only for compiling this target, not its dependencies, so be careful about header files included elsewhere. All paths should be relative to the workspace, not to the current package. If the package declares the feature no_copts_tokenization, Bourne shell tokenization applies only to strings that consist of a single "Make" variable.
defines	List of strings; optional List of defines to add to the compile line. Subject to "Make" variable substitution and Bourne shell tokenization. Each string, which must consist of a single Bourne shell token, is prepended with -D and added to the compile command line to this target, as well as to every rule that depends on it. Be very careful, since this may have far-reaching effects. When in doubt, add define values to local_defines instead.
implementation_deps	List of labels; optional The list of other libraries that the library target depends on. Unlike with deps, the headers and include paths of these libraries (and all their transitive deps) are only used for compilation of this library, and not libraries that depend on it. Libraries specified with implementation_deps are still linked in binary targets that depend on this library. For now usage is limited to cc_libraries and guarded by the flag --experimental_cc_implementation_deps.
include_prefix	String; optional The prefix to add to the paths of the headers of this rule. When set, the headers in the hdrs attribute of this rule are accessible at is the value of this attribute prepended to their repository-relative path. The prefix in the strip_include_prefix attribute is removed before this prefix is added.
includes	List of strings; optional List of include dirs to be added to the compile line. Subject to "Make variable" substitution. Each string is prepended with -isystem and added to COPTS. Unlike COPTS, these flags are added for this rule and every rule that depends on it. (Note: not the rules it depends upon!) Be very careful, since this may have far-reaching effects. When in doubt, add "-I" flags to COPTS instead. Headers must be added to srcs or hdrs, otherwise they will not be available to dependent rules when compilation is sandboxed (the default).
linkopts	List of strings; optional Add these flags to the C++ linker command. Subject to "Make" variable substitution, Bourne shell tokenization and label expansion. Each string in this attribute is added to LINKOPTS before linking the binary target. Each element of this list that does not start with $ or - is assumed to be the label of a target in deps. The list of files generated by that target is appended to the linker options. An error is reported if the label is invalid, or is not declared in deps.
linkstamp	Label; optional Simultaneously compiles and links the specified C++ source file into the final binary. This trickery is required to introduce timestamp information into binaries; if we compiled the source file to an object file in the usual way, the timestamp would be incorrect. A linkstamp compilation may not include any particular set of compiler flags and so should not depend on any particular header, compiler option, or other build variable. This option should only be needed in the base package.
linkstatic	Boolean; optional; default is False For cc_binary and cc_test: link the binary in static mode. For cc_library.linkstatic: see below. By default this option is on for cc_binary and off for the rest. If enabled and this is a binary or test, this option tells the build tool to link in .a's instead of .so's for user libraries whenever possible. Some system libraries may still be linked dynamically, as are libraries for which there is no static library. So the resulting executable will still be dynamically linked, hence only mostly static. There are really three different ways to link an executable: STATIC with fully_static_link feature, in which everything is linked statically; e.g. "gcc -static foo.o libbar.a libbaz.a -lm". This mode is enabled by specifying fully_static_link in the features attribute. STATIC, in which all user libraries are linked statically (if a static version is available), but where system libraries (excluding C/C++ runtime libraries) are linked dynamically, e.g. "gcc foo.o libfoo.a libbaz.a -lm". This mode is enabled by specifying linkstatic=True. DYNAMIC, in which all libraries are linked dynamically (if a dynamic version is available), e.g. "gcc foo.o libfoo.so libbaz.so -lm". This mode is enabled by specifying linkstatic=False. The linkstatic attribute has a different meaning if used on a cc_library() rule. For a C++ library, linkstatic=True indicates that only static linking is allowed, so no .so will be produced. linkstatic=False does not prevent static libraries from being created. The attribute is meant to control the creation of dynamic libraries. If linkstatic=False, then the build tool will create symlinks to depended-upon shared libraries in the *.runfiles area.
local_defines	List of strings; optional List of defines to add to the compile line. Subject to "Make" variable substitution and Bourne shell tokenization. Each string, which must consist of a single Bourne shell token, is prepended with -D and added to the compile command line for this target, but not to its dependents.
nocopts	String; optional Remove matching options from the C++ compilation command. Subject to "Make" variable substitution. The value of this attribute is interpreted as a regular expression. Any preexisting COPTS that match this regular expression (including values explicitly specified in the rule's copts attribute) will be removed from COPTS for purposes of compiling this rule. This attribute should rarely be needed.
strip_include_prefix	String; optional The prefix to strip from the paths of the headers of this rule. When set, the headers in the hdrs attribute of this rule are accessible at their path with this prefix cut off. If it's a relative path, it's taken as a package-relative one. If it's an absolute one, it's understood as a repository-relative path. The prefix in the include_prefix attribute is added after this prefix is stripped.
textual_hdrs	List of labels; optional The list of header files published by this library to be textually included by sources in dependent rules. This is the location for declaring header files that cannot be compiled on their own; that is, they always need to be textually included by other source files to build valid code.
win_def_file	Label; optional The Windows DEF file to be passed to linker. This attribute should only be used when Windows is the target platform. It can be used to export symbols during linking a shared library.

cc_proto_library

cc_proto_library(name, deps, data, compatible_with, deprecation, distribs, exec_compatible_with, exec_properties, features, licenses, restricted_to, tags, target_compatible_with, testonly, visibility)

cc_proto_library generates C++ code from .proto files.

deps must point to proto_library rules.

Example:

cc_library(
    name = "lib",
    deps = [":foo_cc_proto"],
)

cc_proto_library(
    name = "foo_cc_proto",
    deps = [":foo_proto"],
)

proto_library(
    name = "foo_proto",
)

Arguments

Attributes
name	Name; required A unique name for this target.
deps	List of labels; optional The list of proto_library rules to generate C++ code for.

fdo_prefetch_hints

fdo_prefetch_hints(name, compatible_with, deprecation, distribs, features, licenses, profile, restricted_to, tags, target_compatible_with, testonly, visibility)

Represents an FDO prefetch hints profile that is either in the workspace or at a specified absolute path. Examples:

fdo_prefetch_hints(
    name = "hints",
    profile = "//path/to/hints:profile.afdo",
)

fdo_profile(
  name = "hints_abs",
  absolute_path_profile = "/absolute/path/profile.afdo",
)

Arguments

Attributes
name	Name; required A unique name for this target.
profile	Label; optional Label of the hints profile. The hints file has the .afdo extension The label can also point to an fdo_absolute_path_profile rule.

fdo_profile

fdo_profile(name, absolute_path_profile, compatible_with, deprecation, distribs, features, licenses, profile, proto_profile, restricted_to, tags, target_compatible_with, testonly, visibility)

Represents an FDO profile that is either in the workspace or at a specified absolute path. Examples:

fdo_profile(
    name = "fdo",
    profile = "//path/to/fdo:profile.zip",
)

fdo_profile(
  name = "fdo_abs",
  absolute_path_profile = "/absolute/path/profile.zip",
)

Arguments

Attributes
name	Name; required A unique name for this target.
absolute_path_profile	String; optional Absolute path to the FDO profile. The FDO file may only have the .afdo extension.
profile	Label; optional Label of the FDO profile or a rule which generates it. The FDO file can have one of the following extensions: .profraw for unindexed LLVM profile, .profdata for indexed LLVM profile, .zip that holds an LLVM profraw profile, .afdo for AutoFDO profile, .xfdo for XBinary profile. The label can also point to an fdo_absolute_path_profile rule.
proto_profile	Label; optional Label of the protobuf profile.

propeller_optimize

propeller_optimize(name, compatible_with, deprecation, distribs, features, ld_profile, licenses, restricted_to, tags, target_compatible_with, testonly, visibility)

Represents a Propeller optimization profile in the workspace. Example:

propeller_optimize(
    name = "layout",
    cc_profile = "//path:cc_profile.txt",
    ld_profile = "//path:ld_profile.txt"
)

propeller_optimize(
    name = "layout_absolute",
    absolute_cc_profile = "/absolute/cc_profile.txt",
    absolute_ld_profile = "/absolute/ld_profile.txt"
)

Arguments

Attributes
name	Name; required A unique name for this target.
ld_profile	Label; optional Label of the profile passed to the link action. This file has the .txt extension.

cc_test

cc_test(name, deps, srcs, data, additional_linker_inputs, args, compatible_with, copts, defines, deprecation, distribs, env, env_inherit, exec_compatible_with, exec_properties, features, flaky, includes, licenses, linkopts, linkstatic, local, local_defines, malloc, nocopts, restricted_to, shard_count, size, stamp, tags, target_compatible_with, testonly, timeout, toolchains, visibility, win_def_file)

Arguments

Attributes
name	Name; required A unique name for this target.
deps	List of labels; optional The list of other libraries to be linked in to the binary target. These can be cc_library or objc_library targets.
srcs	List of labels; optional The list of C and C++ files that are processed to create the target. These are C/C++ source and header files, either non-generated (normal source code) or generated. All .cc, .c, and .cpp files will be compiled. These might be generated files: if a named file is in the outs of some other rule, this rule will automatically depend on that other rule. A .h file will not be compiled, but will be available for inclusion by sources in this rule. Both .cc and .h files can directly include headers listed in these srcs or in the hdrs of any rule listed in the deps argument. All #included files must be mentioned in the srcs attribute of this rule, or in the hdrs attribute of referenced cc_library()s. The recommended style is for headers associated with a library to be listed in that library's hdrs attribute, and any remaining headers associated with this rule's sources to be listed in srcs. See "Header inclusion checking" for a more detailed description. If a rule's name is in the srcs, then this rule automatically depends on that one. If the named rule's outs are C or C++ source files, they are compiled into this rule; if they are library files, they are linked in. Permitted srcs file types: C and C++ source files: .c, .cc, .cpp, .cxx, .c++, .C C and C++ header files: .h, .hh, .hpp, .hxx, .inc, .inl, .H Assembler with C preprocessor: .S Archive: .a, .pic.a "Always link" library: .lo, .pic.lo Shared library, versioned or unversioned: .so, .so.version Object file: .o, .pic.o ...and any rules that produce those files. Different extensions denote different programming languages in accordance with gcc convention.
additional_linker_inputs	List of labels; optional Pass these files to the C++ linker command. For example, compiled Windows .res files can be provided here to be embedded in the binary target.
copts	List of strings; optional Add these options to the C++ compilation command. Subject to "Make variable" substitution and Bourne shell tokenization. Each string in this attribute is added in the given order to COPTS before compiling the binary target. The flags take effect only for compiling this target, not its dependencies, so be careful about header files included elsewhere. All paths should be relative to the workspace, not to the current package. If the package declares the feature no_copts_tokenization, Bourne shell tokenization applies only to strings that consist of a single "Make" variable.
defines	List of strings; optional List of defines to add to the compile line. Subject to "Make" variable substitution and Bourne shell tokenization. Each string, which must consist of a single Bourne shell token, is prepended with -D and added to the compile command line to this target, as well as to every rule that depends on it. Be very careful, since this may have far-reaching effects. When in doubt, add define values to local_defines instead.
includes	List of strings; optional List of include dirs to be added to the compile line. Subject to "Make variable" substitution. Each string is prepended with -isystem and added to COPTS. Unlike COPTS, these flags are added for this rule and every rule that depends on it. (Note: not the rules it depends upon!) Be very careful, since this may have far-reaching effects. When in doubt, add "-I" flags to COPTS instead. Headers must be added to srcs or hdrs, otherwise they will not be available to dependent rules when compilation is sandboxed (the default).
linkopts	List of strings; optional Add these flags to the C++ linker command. Subject to "Make" variable substitution, Bourne shell tokenization and label expansion. Each string in this attribute is added to LINKOPTS before linking the binary target. Each element of this list that does not start with $ or - is assumed to be the label of a target in deps. The list of files generated by that target is appended to the linker options. An error is reported if the label is invalid, or is not declared in deps.
linkstatic	Boolean; optional; default is False For cc_binary and cc_test: link the binary in static mode. For cc_library.linkstatic: see below. By default this option is on for cc_binary and off for the rest. If enabled and this is a binary or test, this option tells the build tool to link in .a's instead of .so's for user libraries whenever possible. Some system libraries may still be linked dynamically, as are libraries for which there is no static library. So the resulting executable will still be dynamically linked, hence only mostly static. There are really three different ways to link an executable: STATIC with fully_static_link feature, in which everything is linked statically; e.g. "gcc -static foo.o libbar.a libbaz.a -lm". This mode is enabled by specifying fully_static_link in the features attribute. STATIC, in which all user libraries are linked statically (if a static version is available), but where system libraries (excluding C/C++ runtime libraries) are linked dynamically, e.g. "gcc foo.o libfoo.a libbaz.a -lm". This mode is enabled by specifying linkstatic=True. DYNAMIC, in which all libraries are linked dynamically (if a dynamic version is available), e.g. "gcc foo.o libfoo.so libbaz.so -lm". This mode is enabled by specifying linkstatic=False. The linkstatic attribute has a different meaning if used on a cc_library() rule. For a C++ library, linkstatic=True indicates that only static linking is allowed, so no .so will be produced. linkstatic=False does not prevent static libraries from being created. The attribute is meant to control the creation of dynamic libraries. If linkstatic=False, then the build tool will create symlinks to depended-upon shared libraries in the *.runfiles area.
local_defines	List of strings; optional List of defines to add to the compile line. Subject to "Make" variable substitution and Bourne shell tokenization. Each string, which must consist of a single Bourne shell token, is prepended with -D and added to the compile command line for this target, but not to its dependents.
malloc	Label; optional; default is @bazel_tools//tools/cpp:malloc Override the default dependency on malloc. By default, C++ binaries are linked against //tools/cpp:malloc, which is an empty library so the binary ends up using libc malloc. This label must refer to a cc_library. If compilation is for a non-C++ rule, this option has no effect. The value of this attribute is ignored if linkshared=True is specified.
nocopts	String; optional Remove matching options from the C++ compilation command. Subject to "Make" variable substitution. The value of this attribute is interpreted as a regular expression. Any preexisting COPTS that match this regular expression (including values explicitly specified in the rule's copts attribute) will be removed from COPTS for purposes of compiling this rule. This attribute should rarely be needed.
stamp	Integer; optional; default is 0 Whether to encode build information into the binary. Possible values: stamp = 1: Always stamp the build information into the binary, even in --nostamp builds. This setting should be avoided, since it potentially kills remote caching for the binary and any downstream actions that depend on it. stamp = 0: Always replace build information by constant values. This gives good build result caching. stamp = -1: Embedding of build information is controlled by the --[no]stamp flag. Stamped binaries are not rebuilt unless their dependencies change.
win_def_file	Label; optional The Windows DEF file to be passed to linker. This attribute should only be used when Windows is the target platform. It can be used to export symbols during linking a shared library.

cc_toolchain

cc_toolchain(name, all_files, ar_files, as_files, compatible_with, compiler, compiler_files, compiler_files_without_includes, coverage_files, cpu, deprecation, distribs, dwp_files, dynamic_runtime_lib, exec_transition_for_inputs, features, libc_top, licenses, linker_files, module_map, objcopy_files, restricted_to, static_runtime_lib, strip_files, supports_header_parsing, supports_param_files, tags, target_compatible_with, testonly, toolchain_config, toolchain_identifier, visibility)

Represents a C++ toolchain.

This rule is responsible for:

• Collecting all artifacts needed for C++ actions to run. This is done by attributes such as all_files, compiler_files, linker_files, or other attributes ending with _files). These are most commonly filegroups globbing all required files.
• Generating correct command lines for C++ actions. This is done using CcToolchainConfigInfo provider (details below).

Use toolchain_config attribute to configure the C++ toolchain. See also this page for elaborate C++ toolchain configuration and toolchain selection documentation.

Use tags = ["manual"] in order to prevent toolchains from being built and configured unnecessarily when invoking bazel build //...

Arguments

Attributes
name	Name; required A unique name for this target.
all_files	Label; required Collection of all cc_toolchain artifacts. These artifacts will be added as inputs to all rules_cc related actions (with the exception of actions that are using more precise sets of artifacts from attributes below). Bazel assumes that all_files is a superset of all other artifact-providing attributes (e.g. linkstamp compilation needs both compile and link files, so it takes all_files). This is what cc_toolchain.files contains, and this is used by all Starlark rules using C++ toolchain.
ar_files	Label; optional Collection of all cc_toolchain artifacts required for archiving actions.
as_files	Label; optional Collection of all cc_toolchain artifacts required for assembly actions.
compiler	String; optional; nonconfigurable Deprecated. Use toolchain_identifier attribute instead. It will be a noop after CROSSTOOL migration to Starlark , and will be removed by #7075. When set, it will be used to perform crosstool_config.toolchain selection. It will take precedence over --cpu Bazel option.
compiler_files	Label; required Collection of all cc_toolchain artifacts required for compile actions.
compiler_files_without_includes	Label; optional Collection of all cc_toolchain artifacts required for compile actions in case when input discovery is supported (currently Google-only).
coverage_files	Label; optional Collection of all cc_toolchain artifacts required for coverage actions. If not specified, all_files are used.
cpu	String; optional; nonconfigurable Deprecated. Use toolchain_identifier attribute instead. It will be a noop after CROSSTOOL migration to Starlark , and will be removed by #7075. When set, it will be used to perform crosstool_config.toolchain selection. It will take precedence over --cpu Bazel option.
dwp_files	Label; required Collection of all cc_toolchain artifacts required for dwp actions.
dynamic_runtime_lib	Label; optional Dynamic library artifact for the C++ runtime library (e.g. libstdc++.so). This will be used when 'static_link_cpp_runtimes' feature is enabled, and we're linking dependencies dynamically.
exec_transition_for_inputs	Boolean; optional; default is True Set to True to build all file inputs to cc_toolchain for the exec platform, instead of having no transition (i.e. target platform by default).
libc_top	Label; optional A collection of artifacts for libc passed as inputs to compile/linking actions.
linker_files	Label; required Collection of all cc_toolchain artifacts required for linking actions.
module_map	Label; optional Module map artifact to be used for modular builds.
objcopy_files	Label; required Collection of all cc_toolchain artifacts required for objcopy actions.
static_runtime_lib	Label; optional Static library artifact for the C++ runtime library (e.g. libstdc++.a). This will be used when 'static_link_cpp_runtimes' feature is enabled, and we're linking dependencies statically.
strip_files	Label; required Collection of all cc_toolchain artifacts required for strip actions.
supports_header_parsing	Boolean; optional; default is False Set to True when cc_toolchain supports header parsing actions.
supports_param_files	Boolean; optional; default is True Set to True when cc_toolchain supports using param files for linking actions.
toolchain_config	Label; required The label of the rule providing cc_toolchain_config_info.
toolchain_identifier	String; optional; nonconfigurable The identifier used to match this cc_toolchain with the corresponding crosstool_config.toolchain. Until issue #5380 is fixed this is the recommended way of associating cc_toolchain with CROSSTOOL.toolchain. It will be replaced by the toolchain_config attribute (#5380).

cc_toolchain_suite

cc_toolchain_suite(name, compatible_with, deprecation, distribs, features, licenses, restricted_to, tags, target_compatible_with, testonly, toolchains, visibility)

Represents a collections of C++ toolchains.

This rule is responsible for:

• Collecting all relevant C++ toolchains.
• Selecting one toolchain depending on --cpu and --compiler options passed to Bazel.

See also this page for elaborate C++ toolchain configuration and toolchain selection documentation.

Arguments

Attributes
name	Name; required A unique name for this target.
toolchains	Dictionary mapping strings to labels; required; nonconfigurable A map from "<cpu>" or "<cpu>|<compiler>" strings to a cc_toolchain label. "<cpu>" will be used when only --cpu is passed to Bazel, and "<cpu>|<compiler>" will be used when both --cpu and --compiler are passed to Bazel. Example: cc_toolchain_suite( name = "toolchain", toolchains = { "piii|gcc": ":my_cc_toolchain_for_piii_using_gcc", "piii": ":my_cc_toolchain_for_piii_using_default_compiler", }, )