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/toolchain/internal/sysroot.bzl b/toolchain/internal/sysroot.bzl
new file mode 100644
index 0000000..9646d08
--- /dev/null
+++ b/toolchain/internal/sysroot.bzl
@@ -0,0 +1,51 @@
+# 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(
+ "//toolchain/internal:common.bzl",
+ _os_arch_pair = "os_arch_pair",
+ _pkg_path_from_label = "pkg_path_from_label",
+)
+
+def _darwin_sdk_path(rctx):
+ exec_result = rctx.execute(["/usr/bin/xcrun", "--show-sdk-path", "--sdk", "macosx"])
+ if exec_result.return_code:
+ fail("Failed to detect OSX SDK path: \n%s\n%s" % (exec_result.stdout, exec_result.stderr))
+ if exec_result.stderr:
+ print(exec_result.stderr)
+ return exec_result.stdout.strip()
+
+# Default sysroot path can be used when the user has not provided an explicit
+# sysroot for the target, and when host platform is the same as target
+# platform.
+def default_sysroot_path(rctx, os):
+ if os == "darwin":
+ return _darwin_sdk_path(rctx)
+ else:
+ return ""
+
+# Return the sysroot path and the label to the files, if sysroot is not a system path.
+def sysroot_path(sysroot_dict, os, arch):
+ sysroot = sysroot_dict.get(_os_arch_pair(os, arch))
+ if not sysroot:
+ return (None, None)
+
+ # If the sysroot is an absolute path, use it as-is. Check for things that
+ # start with "/" and not "//" to identify absolute paths, but also support
+ # passing the sysroot as "/" to indicate the root directory.
+ if sysroot[0] == "/" and (len(sysroot) == 1 or sysroot[1] != "/"):
+ return (sysroot, None)
+
+ sysroot_path = _pkg_path_from_label(Label(sysroot))
+ return (sysroot_path, sysroot)