Add support for Bazel build (#442)

Signed-off-by: Vertexwahn <julian.amann@tum.de>

.bazelrc

@@ -0,0 +1,19 @@
+# Copyright (c) 2021 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# DISCLAIMER: Bazel support is community-based. The maintainers do not
+# use Bazel internally. The Bazel build can have security risks or 
+# optimization gaps.
+
+build --symlink_prefix=/ # Out of source build

.bazelversion

@@ -0,0 +1 @@
+4.1.0

BUILD.bazel

@@ -0,0 +1,112 @@
+# Copyright (c) 2021 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# DISCLAIMER: Bazel support is community-based. The maintainers do not
+# use Bazel internally. The Bazel build can have security risks or
+# optimization gaps.
+
+package(
+    default_visibility = ["//visibility:public"],
+)
+
+cc_library(
+    name = "tbb",
+    srcs = glob([
+        "src/tbb/*.cpp",
+        "src/tbb/*.h",
+    ]) + select({
+        "@platforms//cpu:x86_64": glob(["src/tbb/tools_api/**/*.h"]),
+        "//conditions:default": [],
+    }),
+    hdrs = glob([
+        "include/tbb/*.h",
+        "include/oneapi/*.h",
+        "include/oneapi/tbb/*.h",
+        "include/oneapi/tbb/detail/*.h",
+    ]),
+    copts = [
+        "-w",
+    ],
+    defines =
+        select({
+            "@platforms//cpu:x86_64": ["__TBB_NO_IMPLICIT_LINKAGE"],
+            "//conditions:default": [
+                "USE_PTHREAD",
+            ],
+        }),
+    includes = [
+        "include",
+    ],
+    linkopts =
+        select({
+            "@bazel_tools//platforms:windows": [],
+            "//conditions:default": [
+                "-ldl",
+                "-pthread",
+                "-lrt",
+            ],
+        }),
+    local_defines = select({
+        "@platforms//cpu:x86_64": [
+            "__TBB_USE_ITT_NOTIFY",
+        ],
+        "//conditions:default": [],
+    }) + [
+        "__TBB_BUILD",
+    ],
+    textual_hdrs = select({
+        "@platforms//cpu:x86_64": [
+            "src/tbb/tools_api/ittnotify_static.c",
+        ],
+        "//conditions:default": [],
+    }),
+)
+
+cc_library(
+    name = "tbbmalloc",
+    srcs =
+        glob([
+            "src/tbbmalloc/*.h",
+            "src/tbb/*.h",
+            "src/tbbmalloc_proxy/*.h",
+        ]) + [
+            "src/tbbmalloc/backend.cpp",
+            "src/tbbmalloc/backref.cpp",
+            "src/tbbmalloc/frontend.cpp",
+            "src/tbbmalloc/large_objects.cpp",
+            "src/tbbmalloc/tbbmalloc.cpp",
+        ],
+    hdrs = glob([
+        "include/tbb/*.h",
+        "include/oneapi/tbb/detail/*.h",
+        "include/oneapi/tbb/*.h",
+    ]),
+    includes = [
+        "include",
+    ],
+    local_defines = [
+        "__TBBMALLOC_BUILD",
+    ],
+)
+
+cc_library(
+    name = "tbbmalloc_proxy",
+    srcs = [
+        "src/tbbmalloc_proxy/function_replacement.cpp",
+        "src/tbbmalloc_proxy/proxy.cpp",
+    ],
+    deps = [
+        ":tbbmalloc",
+    ],
+)

Bazel.md

@@ -0,0 +1,60 @@
+# Bazel build support
+
+The main build system of oneTBB is CMake.
+Bazel support is community-based.
+The maintainers do not use Bazel internally.
+The Bazel configuration may not include recommended compiler and linker flags used in official CMake configuration.
+
+The Bazel build of oneTBB currently only aims for a subset of oneTBB that suffices restricted use cases of the usage of oneTBB.
+Pull requests to improve the Bazel build experience are welcomed.
+
+The standard approach of how Bazel handles third-party libraries is static linking. 
+Even this is not recommended by the oneTBB maintainers this is chosen since this is considered as the best practice in the Bazel ecosystem.
+
+## Example usage
+
+1. [Install Bazel](https://docs.bazel.build/versions/main/install.html).
+
+2. Create the following files in one folder (this folder will be considered as the workspace folder):
+
+_WORKSPACE.bazel_:
+```
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+git_repository(
+    name = "oneTBB",
+    branch = "master",
+    remote = "https://github.com/oneapi-src/oneTBB/",
+)
+```
+
+_BUILD_:
+```
+cc_binary(
+    name = "Demo",
+    srcs = ["main.cpp"],
+    deps = ["@oneTBB//:tbb"],
+)
+```
+
+_main.cpp_:
+```
+#include "oneapi/tbb/version.h"
+
+#include <iostream>
+
+int main() {
+    std::cout << "Hello from oneTBB "
+              << TBB_VERSION_MAJOR << "."
+              << TBB_VERSION_MINOR << "."
+              << TBB_VERSION_PATCH
+              << "!" << std::endl;
+
+    return 0;
+}
+```
+
+3. Switch to the folder where you create the files.
+
+4. Execute the command `bazel run //:Demo`.
+As an expected output, you should see the oneTBB version.

README.md

@@ -13,6 +13,7 @@ Here are [Release Notes]( https://software.intel.com/en-us/articles/intel-oneapi
 * [oneTBB Developer Guide and Reference](https://software.intel.com/en-us/oneapi-tbb-documentation)
 * [Migrating from TBB to oneTBB](https://software.intel.com/content/www/us/en/develop/documentation/onetbb-documentation/top/onetbb-developer-guide/migrating-from-threading-building-blocks-tbb.html)
 * README for build system: [cmake/README.md](cmake/README.md)
+* [Basic support for the Bazel build system](Bazel.md)
 
 ## Support
 Please report issues and suggestions via

WORKSPACE.bazel

@@ -0,0 +1,19 @@
+# Copyright (c) 2021 Intel Corporation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# DISCLAIMER: Bazel support is community-based. The maintainers do not
+# use Bazel internally. The Bazel build can have security risks or 
+# optimization gaps.
+
+workspace(name = "oneTBB")