Squashed 'third_party/bazel-toolchain/' content from commit a912bb381
Change-Id: Ie1ff8ed3b3948cca1d1b6227097c95e5a048de86
git-subtree-dir: third_party/bazel-toolchain
git-subtree-split: a912bb381b36437be0eeb22de11f0ea198450b4e
Signed-off-by: Brian Silverman <bsilver16834@gmail.com>
diff --git a/tests/BUILD.bazel b/tests/BUILD.bazel
new file mode 100644
index 0000000..e8d703f
--- /dev/null
+++ b/tests/BUILD.bazel
@@ -0,0 +1,110 @@
+# Copyright 2018 The Bazel Authors.
+#
+# 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.
+
+load("@bazel_skylib//rules:build_test.bzl", "build_test")
+load("@rules_cc//cc:defs.bzl", "cc_binary", "cc_library", "cc_test")
+load(":transitions.bzl", "dwp_file")
+
+cc_library(
+ name = "stdlib",
+ srcs = ["stdlib.cc"],
+ hdrs = ["stdlib.h"],
+)
+
+# We want to emulate the behavior of cc_binary but be able to run the target as
+# a test, so we use a cc_test target with linkstatic.
+cc_test(
+ name = "stdlib_test",
+ srcs = ["stdlib_test.cc"],
+ linkstatic = True,
+ deps = [":stdlib"],
+)
+
+# We want to test a `.stripped` target to make sure `llvm-strip` can be called.
+#
+# For this we need `cc_binary`; `cc_test` does not create `.stripped` targets.
+cc_binary(
+ name = "stdlib_bin",
+ srcs = ["stdlib_test.cc"],
+ deps = [":stdlib"],
+)
+
+build_test(
+ name = "stripped_binary_test",
+ targets = [
+ ":stdlib_bin.stripped",
+ ],
+)
+
+# We want to test that `llvm-dwp` (used when assembling a `.dwp` file from
+# `.dwo` files) can be called.
+#
+# `--fission=yes` enables this for all compilation modes but we also need to
+# enable the `per_object_debug_info` feature manually because
+# `unix_cc_toolchain_config.bzl`'s` `cc_toolchain_config` does not (see #109).
+#
+# Additionally, newer versions of clang (12+) require a non-zero `-g` setting to
+# actually produce the `.dwo` files in addition to the `-gsplit-dwarf` flag. The
+# feature in `unix_cc_toolchain_config.bzl` should be updated to reflect this
+# and pass in an appropriate `-g` flag.
+#
+# bazelbuild/rules_cc#115 is a patch that does this
+# (https://github.com/bazelbuild/rules_cc/pull/115).
+#
+# bazelbuild/bazel#14028 tracks this
+# (https://github.com/bazelbuild/bazel/issues/14038).
+#
+# #109 in this repo and this comment
+# (https://github.com/grailbio/bazel-toolchain/pull/108#issuecomment-928839768)
+# have some additional details.
+#
+# For now, we'll specify `-c dbg` when building `.dwo` and `.dwp` files.
+#
+# This (setting the fission flag, enabling the `per_object_debug_info` feature,
+# and setting the compilation mode to `dbg`) is what `dwp_file` does using a
+# transition.
+#
+# Unfortunately `per_object_debug_info` breaks on macOS which is why this target
+# is marked as only being compatible with Linux (see #109).
+dwp_file(
+ name = "stdlib.dwp",
+ src = ":stdlib_bin",
+ # NOTE: we should eventually we able to drop this; see #109.
+ override_compilation_mode = "dbg",
+ target_compatible_with = [
+ "@platforms//os:linux",
+ ],
+)
+
+build_test(
+ name = "dwp_test",
+ targets = [
+ ":stdlib.dwp",
+ ],
+)
+
+cc_test(
+ name = "pthread_link_test",
+ srcs = ["pthread_link_test.cc"],
+ linkstatic = False,
+)
+
+sh_test(
+ name = "file_dependency_test",
+ srcs = ["file_dependency_test.sh"],
+ data = [
+ "@llvm_toolchain_llvm//:bin/clang-format",
+ "@llvm_toolchain_llvm//:lib/libc++.a",
+ ],
+)