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Add user-facing documentation for cc_tool_map
Adds user-facing documentation for the cc_tool_map toolchain rule, including an example and higher level analogies.
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PiperOrigin-RevId: 671777889
Change-Id: Ib53de76f355db43a9530f7cbe11face3c9219675
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Implement archiver_flags as cc_args
This is the first change in a series that will reimplement the legacy
features defined in Bazel's Java code using the new toolchain rules. These implementations are redefined as raw arguments using the new toolchain rules, which allows for the definition shared and reused across different contexts.
This first change implements archiver_flags, which is used to produce the arguments for the archiver tool used by `cc_library`.
This CL also adds a test that compares the feature implementation produced by
the new rules to the feature implementation defined in Bazel's Java
code. This should make it easier to review the final result and ensure it
is functionally equivalent to the Java implementation.
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PiperOrigin-RevId: 671403834
Change-Id: I2d4f15b49619a11995a50c86439340ea532e360e
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Add support for implicit include directories to rule-based toolchains
Reorients the `cc_toolchain.cxx_builtin_include_directories` attribute so it is expressed as an attribute on `cc_args` and `cc_tool` to signify that the tools or arguments imply include directories that Bazel's include path checker should allowlist. This moves the allowlist to the source of truth that implies these directories.
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PiperOrigin-RevId: 671393376
Change-Id: Ide8cae548783726835168adcd3f705028a1f4308
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Fix action label evaluation in cc_sysroot
Explicitly converts action labels in cc_sysroot to Label objects to address issues where the labels were being evaluated as relative to the module instantiating cc_sysroot rules.
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PiperOrigin-RevId: 667520654
Change-Id: Ia64306cc172dfaa747ef28a92390bcd90296b109
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Replace sysroot with a cc_sysroot macro.
This is part of what amontanez@ and I discussed about making C++ toolchains less "magic".
I'd like to do the same for cxx_builtin_include_directories, but that will require significantly more effort.
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PiperOrigin-RevId: 666607531
Change-Id: Ic9cfb157e892c05a9c875f240c0ed9a1048dea19
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Integrate cc_tool_map into rule-based toolchains
Integrates cc_tool_map as a new attribute of cc_toolchain, completely replacing cc_action_type_config.
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PiperOrigin-RevId: 666365739
Change-Id: Iac74a31736dad66ac3dc75b4478ab4d4d2412181
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Make enabled_features functionally equivalent to cc_feature(..., enabled=True)
This should allow you to disable an enabled feature elsewhere in the toolchain.
Fixes #233
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PiperOrigin-RevId: 666318466
Change-Id: I0b820cb2033d4ce8b141ff74dcd6516b8157c2b4
BEGIN_PUBLIC
Disallow features from specifying whether they are enabled by default or not.
Such a decision shouldn't be made by the feature, but instead by the toolchain author.
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PiperOrigin-RevId: 658621275
Change-Id: I4dae8ee1acc349a0ff6f09e6cf68e15fdc481a48
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Replace toolchain_features with known_features and enabled_features.
This should allow for the deprecation of action_type_config, as `implies` there is no longer required.
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PiperOrigin-RevId: 658620044
Change-Id: Idda9bd77edad1be1fd26d5a655e3b9084d38bca8
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Remove feature requirements from tools.
It's such a niche use case, adds a fair amount of complexity, and there are multiple alternatives available:
* Now that we're using rule based things, you should just be able to add a bazel flag and select on it in your tool definition.
* If you really want precisely that behaviour, you can make your feature add "--use-foo-tool" to the args, and make your tool a wrapper tool that reads the command-line argument, and if provided, invokes a different tool.
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PiperOrigin-RevId: 657383729
Change-Id: Idb4f3ad66dc92d48ef81a1e8875bf6d3ba215aa4
This CL is an alternative to unknown commit. I left the other CL seperately, because I wasn't 100% sure that we'd agree to this, since this is an API change.
I did it this way because I believe it's much less hacky, and it also allows us to format things that aren't variables.
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Add support for select'ing on cc_args(args=...).
This is quite tricky because the one parameter was being split into two in a macro, one of type label and the other of type string.
For example, `args = ["--foo", format_arg("--bar=%s", "//path/to:bar")]` was rewritten by the macro to `args = [json.encode(struct(format_type="raw", format="foo")), json.encode(struct(format_type="format_arg", format="--bar=%s", value=0))], variables = ["//path/to:bar"]`.
To allow it to work with selects, we need to ensure that we don't perform post-processing on the inside of the select. To solve this, we:
* Ensure that args only take strings
* Provide a seperate parameter for substitutions.
This new mechanism also has the useful property that we can now format things that are not variables. For example, I can do the following:
```
directory(name = "sysroot", ...)
cc_args(
name = "sysroot_arg",
args = ["--sysroot={sysroot}"],
format = {
":sysroot": "sysroot"
}
)
```
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PiperOrigin-RevId: 656211278
Change-Id: If83f1ea5a99090c18f2a561c51ec6d39ce9fe419
BEGIN_PUBLIC
Update toolchain variable definitions to allow static linking
Updates the rules-based-toolchain variable definitions to reflect the how the variables are used in Bazel's CppActionConfigs.java Java implementation, particularly with respect to static linking.
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PiperOrigin-RevId: 647301605
Change-Id: I7ff87a75f9654d70ea160282ba66e99363c79ce5
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Makes the `args` attribute of `cc_feature` optional so that users may declare sentinel features that do not have any inherent arguments.
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PiperOrigin-RevId: 646545838
Change-Id: I470a496aec951608f21cc8ea693387c5b551c8a9
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Remove the "data" attribute from cc_action_type_config.
Technically speaking, data shouldn't be associated with action types. Instead, data should be associated with either a tool or a set of flags.
For example, instead of the cc_compile action having the header files as a data dependency, the "include_paths" cc_arg should instead declare `data = <header files>`.
This will allow us to, once we have a fully starlark-ified c++ toolchain, do much finer-grained dependencies. This will allow us to, for example, not provide header files to the action when the user enables the feature "nostdlib".
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PiperOrigin-RevId: 642434412
Change-Id: Id16fe05a1c86bbaf4718cd36a15f8a9d6afb0163
BEGIN_PUBLIC
Make output_file accessible from strip.
See https://github.com/bazelbuild/bazel/pull/22638
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PiperOrigin-RevId: 640622335
Change-Id: I96fdca9494e5043f546b588490d692d67f94ee2b
BEGIN_PUBLIC
Remove legacy toolchain flags.
This will allow us to enforce that users of the rule based toolchain are not using legacy toolchain resolution, and simplify toolchain creation.
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PiperOrigin-RevId: 640017209
Change-Id: I6ea4fad8ddf1a06ad17d706d82e54eb7f05aa6c6
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Create a cc_directory_tool rule.
This should allow for easy definition of tools from the sysroot. For example:
cc_directory_tool(
name = "clang",
directory = "@sysroot//:sysroot",
executable = "usr/bin/clang",
)
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PiperOrigin-RevId: 639947945
Change-Id: I4c211eb9c0b5fdc6457d9d32ef9250b5384a4ef3
BEGIN_PUBLIC
Make toolchains use directory markers instead of strings.
You now refer to this instead of a string containing the repo mapped path.
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PiperOrigin-RevId: 639946886
Change-Id: I409be7b7002252b06562a2982a2568e79811877d
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Doing a transition to the exec platform in rule-based toolchains was causing unusual behaviors when attempting to restrict compatibility. This changes most of the toolchain rules to be evaluated from the target platform configuration, only transitioning to the exec configuration when explicitly requested.
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PiperOrigin-RevId: 634411095
Change-Id: I8716b9a517d9f3be306cdf96dafb98a868a3f83b
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In create_cc_toolchain_config_info, the target_system_name, target_cpu, and target_libc attributes are documented as required and deprecated. In practice, these may safely be `None`. This updates the cc_toolchain rule implementation to no longer require that these attributes are set to arbitrary values.
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PiperOrigin-RevId: 633149160
Change-Id: Ief1d3236ead9299b307ce9ace68cd295536a7b3b
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Implement flag_group in the new rule-based toolchain.
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PiperOrigin-RevId: 622107179
Change-Id: I9e1971e279f313ce85537c899bcf80860616f8b7
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Fix the load broken by a new version of buildifier.
Apparently the native-cc lint has been split into native-cc and native-cc-proto. This meant that our native.cc_proto_library was getting incorrectly turned into cc_proto_library when copybara invoked buildifier.
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PiperOrigin-RevId: 622097522
Change-Id: Idb89a5f9facae20f490ac8f83a5adf2859cd52ab
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Gather variable metadata for the new rule-based toolchain.
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PiperOrigin-RevId: 622000877
Change-Id: I5b2ea6c363fc43fd44e60ffc8fa7ae041545337e
BEGIN_PUBLIC
Improve errors in variable definitions by adding labels to the variables.
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PiperOrigin-RevId: 618984216
Change-Id: I5d6d11ba2b72f426b9f01bcbb528b0914c98c964
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Refactor action sets for consistency and simplicity
* Remove the "CC" prefix on some of the actions, as we're already within the scope of rules_cc.
* Remove the "all" prefix, since the plural "actions" should already imply this.
* Ensure all action types sets end with "_actions"
* Refactor some action type sets to be constructed from other (eg. link actions = link executables + link dynamic libraries).
* Remove the redundant "all_compile_actions", since it was equivalent to "all_cc_compile_actions"
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PiperOrigin-RevId: 617985242
Change-Id: I9a3621a9d613ff604efdc5c86ba52e5c77f06731
BEGIN_PUBLIC
Add strictly typed variables to toolchain rules.
This should allow us to implement a proper replacement for flag_group
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PiperOrigin-RevId: 617338607
Change-Id: I7f3058578cb5eb17ecc1aa38d2e1459e0742aee9
After discussion with @amontanez in unknown commit, we decided that NestedArgs was a more appropriate name.
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Rename ExpandArgs to NestedArgs
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PiperOrigin-RevId: 617085672
Change-Id: I1d7190cac79f8fa953d23be7d0db3b028a84cf30
BEGIN_PUBLIC
Refactor AddArgsInfo into ExpandArgsInfo
This allows us to create a similar mechanism to the current toolchain, while maintaining type safety.
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PiperOrigin-RevId: 615939056
Change-Id: I9b6763150194f8a76dfd8da730a3e2d45accbe20
Fix problem with the toolchain definition.
A test for this will be added later in the form of an example toolchain.
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PiperOrigin-RevId: 615416990
Change-Id: I1f7fd1640e88b446597768b4f75c2154b630074f
BEGIN_PUBLIC
Rename additional_files to data.
This is more consistent with other rules.
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PiperOrigin-RevId: 615364332
Change-Id: Ic27ec8c8e72d290e72074034f85a34b38401599b
BEGIN_PUBLIC
Implement the cc_toolchain macro.
Things should be working at this point. This will be followed up with an example.
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PiperOrigin-RevId: 613436885
Change-Id: I1fc4a1e3a71c4f819998b69c73922821322d2991
Armando Montanez