Add runsc-race target.

PiperOrigin-RevId: 210422178
Change-Id: I984dd348d467908bc3180a20fc79b8387fcca05e

runsc/BUILD

@@ -19,3 +19,32 @@ go_binary(
         "@com_github_google_subcommands//:go_default_library",
     ],
 )
+
+# The runsc-race target is a race-compatible BUILD target. This must be built
+# via "bazel build --features=race //runsc:runsc-race", since the race feature
+# must apply to all dependencies due a bug in gazelle file selection.  The pure
+# attribute must be off because the race detector requires linking with non-Go
+# components, although we still require a static binary.
+#
+# Note that in the future this might be convertible to a compatible target by
+# using the pure and static attributes within a select function, but select is
+# not currently compatible with string attributes [1].
+#
+# [1] https://github.com/bazelbuild/bazel/issues/1698
+go_binary(
+    name = "runsc-race",
+    srcs = [
+        "main.go",
+    ],
+    static = "on",
+    visibility = [
+        "//visibility:public",
+    ],
+    x_defs = {"main.gitRevision": "{GIT_REVISION}"},
+    deps = [
+        "//pkg/log",
+        "//runsc/boot",
+        "//runsc/cmd",
+        "@com_github_google_subcommands//:go_default_library",
+    ],
+)