Use go:build directives in generated files.

Build constraints are now inferred from go:build directives rather than +build
directives. +build directives are still emitted in generated files as required
in Go 1.16 and earlier.

Note that go/build/constraint was added in Go 1.16, so gVisor now requires Go
1.16.

PiperOrigin-RevId: 387240779

1 files changed, 18 insertions, 0 deletions

diff --git a/tools/constraintutil/BUILD b/tools/constraintutil/BUILD
new file mode 100644
index 000000000..004b708c4
--- /dev/null
+++ b/tools/constraintutil/BUILD
@@ -0,0 +1,18 @@
+load("//tools:defs.bzl", "go_library", "go_test")
+
+package(licenses = ["notice"])
+
+go_library(
+    name = "constraintutil",
+    srcs = ["constraintutil.go"],
+    marshal = False,
+    stateify = False,
+    visibility = ["//tools:__subpackages__"],
+)
+
+go_test(
+    name = "constraintutil_test",
+    size = "small",
+    srcs = ["constraintutil_test.go"],
+    library = ":constraintutil",
+)