# Copyright Materialize, Inc. and contributors. All rights reserved.
#
# Use of this software is governed by the Business Source License
# included in the LICENSE file.
#
# As of the Change Date specified in that file, in accordance with
# the Business Source License, use of this software will be governed
# by the Apache License, Version 2.0.

"""
Defines configuration attributes for the systems we target.

You can configure builds in Bazel using "configurable attributes" generally via
the `select(...)` function. The following setting groups define the targets we
support building Materialize for.
"""

load("@bazel_skylib//lib:selects.bzl", "selects")
load("@bazel_skylib//rules:common_settings.bzl", "bool_flag", "string_flag")

# A flag that we can specify on the command line to configure whether or not we
# build with a sanitizer.
string_flag(
    name = "sanitizer",
    build_setting_default = "none",
    values = [
        "none",
        "address",
        "hwaddress",
    ],
)

config_setting(
    name = "sanitizer_none",
    flag_values = {":sanitizer": "none"},
)

config_setting(
    name = "sanitizer_address",
    flag_values = {":sanitizer": "address"},
)

config_setting(
    name = "sanitizer_hwaddress",
    flag_values = {":sanitizer": "hwaddress"},
)

bool_flag(
    name = "xlang_lto",
    build_setting_default = False,
)

config_setting(
    name = "use_xlang_lto",
    flag_values = {":xlang_lto": "True"},
)

# With our current toolchain setup, cross language LTO is only supported when building for Linux.
#
# See <https://github.com/rust-lang/rust/issues/60059> for macOS support.
selects.config_setting_group(
    name = "xlang_lto_enabled",
    match_all = [
        "@platforms//os:linux",
        ":use_xlang_lto",
        # ASAN doesn't support being built when cross language LTO is enabled.
        ":sanitizer_none",
    ],
    visibility = ["//visibility:public"],
)

# We only want to use jemalloc if we're building for Linux and we're not using sanitizers.
selects.config_setting_group(
    name = "use_jemalloc",
    match_all = [
        "@platforms//os:linux",
        ":sanitizer_none",
    ],
    visibility = ["//visibility:public"],
)

selects.config_setting_group(
    name = "linux_x86_64",
    match_all = [
        "@platforms//os:linux",
        "@platforms//cpu:x86_64",
    ],
    visibility = ["//visibility:public"],
)

selects.config_setting_group(
    name = "linux_arm",
    match_all = [
        "@platforms//os:linux",
        "@platforms//cpu:arm64",
    ],
    visibility = ["//visibility:public"],
)

selects.config_setting_group(
    name = "macos_x86_64",
    match_all = [
        "@platforms//os:macos",
        "@platforms//cpu:x86_64",
    ],
    visibility = ["//visibility:public"],
)

selects.config_setting_group(
    name = "macos_arm",
    match_all = [
        "@platforms//os:macos",
        "@platforms//cpu:arm64",
    ],
    visibility = ["//visibility:public"],
)