commit d2e02548768c8e61607a1317c7c4fee5b29131b2
author rosica <rosica@google.com> Tue Aug 21 13:18:43 2018 -0700
committer Copybara-Service <copybara-piper@google.com> Tue Aug 21 13:20:35 2018 -0700
tree 945bfc39eb2b69bf3bc4eb001dace05f4d50c5d0
parent a168a8224da1352c8a43281a8a263fc204ffdceb

Make creating a CcToolchainConfigInfo from Skylark possible

Work towards issue #5380.

//tools/cpp/cc_toolchain_config_lib.bzl contains all the necessary functionality for
one to be able to create a CcToolchainConfigInfo provider from Skylark. CcToolchainConfigInfo currently encapsulates the info read from the CROSSTOOL file. We are moving away from using the CROSSTOOL files, in the future we will reroute the logic
through an attribute of cc_toolchain that will point to a Skylark rule.
A CcToolchainConfigInfo provider can be created with the cc_common.create_cc_toolchain_config_info()
method.

e.g:

crosstool_rule = rule{
    implementation = _impl,
    provides = [CcToolchainConfigInfo],
)

def _impl(ctx):
    feature1 = feature(
        name = "feature_one",
        flag_sets = [
            flag_set(actions = ["action1"]),
            flag_set(
                actions = ["action1"],
                flag_groups = [
                    flag_group(
                        flags = ["flag1"],
                    ),
                    flag_group(
                        flag_groups = [
                            flag_group(
                                flags = ["flag1"],
                            ),
                        ],
                        expand_if_equal = variable_with_value(
                            name = "variable1",
                            value = "value",
                        ),
                    ),
                ],
                expand_if_all_available = ["sysroot"],
            ),
        ],
    )
    action_config1 = action_config(action_name = "action_one", enabled = True)
    action_config2 = action_config(
        action_name = "action_two",
        enabled = True,
        tools = [tool(path = "/a/b/c")],
    )
    artifact_name_pattern1 = artifact_name_pattern(
        category_name = "static_library",
        prefix = "prefix",
        extension = ".a",
    )
    cc_target_os = "os"

    return  cc_common.create_cc_toolchain_config_info(
        features = [feature1],
        action_configs = [action_config1, action_config2],
        artifact_name_patterns = [artifact_name_pattern1],
        cc_target_os = cc_target_os,
        make_variables = [make_variable(name = "v1", value = "val")],
    )

RELNOTES: None.
PiperOrigin-RevId: 209648136