Revert "cmd/cgo, cmd/compile, cmd/link: remove old style build tags"

This reverts commit 66165739828b8326b625463beb51ae510b2ab8dd, corresponding to CL 436915.

Reason for revert: this is causing some bootstrap build problems with older versions of Go 1.17, as I understand it. Still under investigation.

Change-Id: Idb6e17ff7b47004cbf87f967af6d84f214d8abb5
Reviewed-on: https://go-review.googlesource.com/c/go/+/435471
Reviewed-by: David Chase <drchase@google.com>

33 files changed, 53 insertions, 0 deletions

diff --git a/src/cmd/cgo/ast_go1.go b/src/cmd/cgo/ast_go1.go
index ce61d29095..f52bf00d7c 100644
--- a/src/cmd/cgo/ast_go1.go
+++ b/src/cmd/cgo/ast_go1.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build compiler_bootstrap
+// +build compiler_bootstrap
 
 package main
 
diff --git a/src/cmd/cgo/ast_go118.go b/src/cmd/cgo/ast_go118.go
index 9f759b8ee5..db0108ed72 100644
--- a/src/cmd/cgo/ast_go118.go
+++ b/src/cmd/cgo/ast_go118.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build !compiler_bootstrap
+// +build !compiler_bootstrap
 
 package main
 
diff --git a/src/cmd/compile/internal/base/bootstrap_false.go b/src/cmd/compile/internal/base/bootstrap_false.go
index ea6da4348f..c77fcd7308 100644
--- a/src/cmd/compile/internal/base/bootstrap_false.go
+++ b/src/cmd/compile/internal/base/bootstrap_false.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build !compiler_bootstrap
+// +build !compiler_bootstrap
 
 package base
 
diff --git a/src/cmd/compile/internal/base/bootstrap_true.go b/src/cmd/compile/internal/base/bootstrap_true.go
index d0c6c88f56..1eb58b2f9d 100644
--- a/src/cmd/compile/internal/base/bootstrap_true.go
+++ b/src/cmd/compile/internal/base/bootstrap_true.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build compiler_bootstrap
+// +build compiler_bootstrap
 
 package base
 
diff --git a/src/cmd/compile/internal/base/mapfile_mmap.go b/src/cmd/compile/internal/base/mapfile_mmap.go
index 6c5a4213a2..b01d0f4efc 100644
--- a/src/cmd/compile/internal/base/mapfile_mmap.go
+++ b/src/cmd/compile/internal/base/mapfile_mmap.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || (solaris && go1.20)
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris,go1.20
 
 package base
 
diff --git a/src/cmd/compile/internal/base/mapfile_read.go b/src/cmd/compile/internal/base/mapfile_read.go
index 5ac6272dc1..e84810ea34 100644
--- a/src/cmd/compile/internal/base/mapfile_read.go
+++ b/src/cmd/compile/internal/base/mapfile_read.go
@@ -3,6 +3,13 @@
 // license that can be found in the LICENSE file.
 
 //go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !(solaris && go1.20)
+// +build !darwin
+// +build !dragonfly
+// +build !freebsd
+// +build !linux
+// +build !netbsd
+// +build !openbsd
+// +build !solaris !go1.20
 
 package base
 
diff --git a/src/cmd/compile/internal/ir/mknode.go b/src/cmd/compile/internal/ir/mknode.go
index caf4ba0135..68d8999f83 100644
--- a/src/cmd/compile/internal/ir/mknode.go
+++ b/src/cmd/compile/internal/ir/mknode.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 // Note: this program must be run in this directory.
 //   go run mknode.go
diff --git a/src/cmd/compile/internal/ssa/flags_test.go b/src/cmd/compile/internal/ssa/flags_test.go
index d0079ac5e8..0bc1097199 100644
--- a/src/cmd/compile/internal/ssa/flags_test.go
+++ b/src/cmd/compile/internal/ssa/flags_test.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build amd64 || arm64
+// +build amd64 arm64
 
 package ssa
 
diff --git a/src/cmd/compile/internal/ssa/gen/386Ops.go b/src/cmd/compile/internal/ssa/gen/386Ops.go
index 4b7fe9fe37..88e061151e 100644
--- a/src/cmd/compile/internal/ssa/gen/386Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/386Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/AMD64Ops.go b/src/cmd/compile/internal/ssa/gen/AMD64Ops.go
index 65456a8f77..fc42fa5e28 100644
--- a/src/cmd/compile/internal/ssa/gen/AMD64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/AMD64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/ARM64Ops.go b/src/cmd/compile/internal/ssa/gen/ARM64Ops.go
index 4ef949a179..0e6e6e4a5f 100644
--- a/src/cmd/compile/internal/ssa/gen/ARM64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/ARM64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/ARMOps.go b/src/cmd/compile/internal/ssa/gen/ARMOps.go
index 99684e4e03..3803f273c1 100644
--- a/src/cmd/compile/internal/ssa/gen/ARMOps.go
+++ b/src/cmd/compile/internal/ssa/gen/ARMOps.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/LOONG64Ops.go b/src/cmd/compile/internal/ssa/gen/LOONG64Ops.go
index fdf42ec944..a59b592445 100644
--- a/src/cmd/compile/internal/ssa/gen/LOONG64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/LOONG64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/MIPS64Ops.go b/src/cmd/compile/internal/ssa/gen/MIPS64Ops.go
index 59a9c8c714..7b18c42ffb 100644
--- a/src/cmd/compile/internal/ssa/gen/MIPS64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/MIPS64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/MIPSOps.go b/src/cmd/compile/internal/ssa/gen/MIPSOps.go
index 17ae3d4251..523847badc 100644
--- a/src/cmd/compile/internal/ssa/gen/MIPSOps.go
+++ b/src/cmd/compile/internal/ssa/gen/MIPSOps.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/PPC64Ops.go b/src/cmd/compile/internal/ssa/gen/PPC64Ops.go
index 4428ea62a7..30a6f6fe07 100644
--- a/src/cmd/compile/internal/ssa/gen/PPC64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/PPC64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go b/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go
index 1d2d22643d..f09910782d 100644
--- a/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/RISCV64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/S390XOps.go b/src/cmd/compile/internal/ssa/gen/S390XOps.go
index 29cb260d87..eef8a2557c 100644
--- a/src/cmd/compile/internal/ssa/gen/S390XOps.go
+++ b/src/cmd/compile/internal/ssa/gen/S390XOps.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/WasmOps.go b/src/cmd/compile/internal/ssa/gen/WasmOps.go
index 1ba94eaa5f..edfba4ee99 100644
--- a/src/cmd/compile/internal/ssa/gen/WasmOps.go
+++ b/src/cmd/compile/internal/ssa/gen/WasmOps.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/dec64Ops.go b/src/cmd/compile/internal/ssa/gen/dec64Ops.go
index 24b23c00b7..78fcea885a 100644
--- a/src/cmd/compile/internal/ssa/gen/dec64Ops.go
+++ b/src/cmd/compile/internal/ssa/gen/dec64Ops.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/decOps.go b/src/cmd/compile/internal/ssa/gen/decOps.go
index 5449727a8a..d5cd79378c 100644
--- a/src/cmd/compile/internal/ssa/gen/decOps.go
+++ b/src/cmd/compile/internal/ssa/gen/decOps.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/genericOps.go b/src/cmd/compile/internal/ssa/gen/genericOps.go
index df649eeece..d09b9aab75 100644
--- a/src/cmd/compile/internal/ssa/gen/genericOps.go
+++ b/src/cmd/compile/internal/ssa/gen/genericOps.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 package main
 
diff --git a/src/cmd/compile/internal/ssa/gen/main.go b/src/cmd/compile/internal/ssa/gen/main.go
index fd00df680d..81740dcf1c 100644
--- a/src/cmd/compile/internal/ssa/gen/main.go
+++ b/src/cmd/compile/internal/ssa/gen/main.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 // The gen command generates Go code (in the parent directory) for all
 // the architecture-specific opcodes, blocks, and rewrites.
diff --git a/src/cmd/compile/internal/ssa/gen/rulegen.go b/src/cmd/compile/internal/ssa/gen/rulegen.go
index d7b4cfa612..fc9b4c9b3e 100644
--- a/src/cmd/compile/internal/ssa/gen/rulegen.go
+++ b/src/cmd/compile/internal/ssa/gen/rulegen.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build gen
+// +build gen
 
 // This program generates Go code that applies rewrite rules to a Value.
 // The generated code implements a function of type func (v *Value) bool
diff --git a/src/cmd/compile/internal/typecheck/builtin/runtime.go b/src/cmd/compile/internal/typecheck/builtin/runtime.go
index 83695013c3..310148ce00 100644
--- a/src/cmd/compile/internal/typecheck/builtin/runtime.go
+++ b/src/cmd/compile/internal/typecheck/builtin/runtime.go
@@ -7,6 +7,7 @@
 // to avoid depending on having a working compiler binary.
 
 //go:build ignore
+// +build ignore
 
 package runtime
 
diff --git a/src/cmd/compile/internal/typecheck/mkbuiltin.go b/src/cmd/compile/internal/typecheck/mkbuiltin.go
index 4def95ebd6..aa3a94a19a 100644
--- a/src/cmd/compile/internal/typecheck/mkbuiltin.go
+++ b/src/cmd/compile/internal/typecheck/mkbuiltin.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build ignore
+// +build ignore
 
 // Generate builtin.go from builtin/runtime.go.
 
diff --git a/src/cmd/compile/internal/types2/example_test.go b/src/cmd/compile/internal/types2/example_test.go
index 9212c38560..ad0f22fcec 100644
--- a/src/cmd/compile/internal/types2/example_test.go
+++ b/src/cmd/compile/internal/types2/example_test.go
@@ -6,6 +6,7 @@
 // access to compiled packages for import.
 //
 //go:build !arm && !arm64
+// +build !arm,!arm64
 
 package types2_test
 
diff --git a/src/cmd/internal/bio/buf_mmap.go b/src/cmd/internal/bio/buf_mmap.go
index e428952bc9..3543637154 100644
--- a/src/cmd/internal/bio/buf_mmap.go
+++ b/src/cmd/internal/bio/buf_mmap.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build darwin || dragonfly || freebsd || linux || netbsd || openbsd || (solaris && go1.20)
+// +build darwin dragonfly freebsd linux netbsd openbsd solaris,go1.20
 
 package bio
 
diff --git a/src/cmd/internal/bio/buf_nommap.go b/src/cmd/internal/bio/buf_nommap.go
index e904860983..dab3435260 100644
--- a/src/cmd/internal/bio/buf_nommap.go
+++ b/src/cmd/internal/bio/buf_nommap.go
@@ -3,6 +3,13 @@
 // license that can be found in the LICENSE file.
 
 //go:build !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !(solaris && go1.20)
+// +build !darwin
+// +build !dragonfly
+// +build !freebsd
+// +build !linux
+// +build !netbsd
+// +build !openbsd
+// +build !solaris !go1.20
 
 package bio
 
diff --git a/src/cmd/link/elf_test.go b/src/cmd/link/elf_test.go
index 6a94b264a1..5037f5b6c0 100644
--- a/src/cmd/link/elf_test.go
+++ b/src/cmd/link/elf_test.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build dragonfly || freebsd || linux || netbsd || openbsd
+// +build dragonfly freebsd linux netbsd openbsd
 
 package main
 
diff --git a/src/cmd/link/internal/ld/outbuf_mmap.go b/src/cmd/link/internal/ld/outbuf_mmap.go
index 7bb728a1f8..d8f8a10db1 100644
--- a/src/cmd/link/internal/ld/outbuf_mmap.go
+++ b/src/cmd/link/internal/ld/outbuf_mmap.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || (solaris && go1.20)
+// +build aix darwin dragonfly freebsd linux netbsd openbsd solaris,go1.20
 
 package ld
 
diff --git a/src/cmd/link/internal/ld/outbuf_nofallocate.go b/src/cmd/link/internal/ld/outbuf_nofallocate.go
index dd5afc61db..6564bd54a3 100644
--- a/src/cmd/link/internal/ld/outbuf_nofallocate.go
+++ b/src/cmd/link/internal/ld/outbuf_nofallocate.go
@@ -3,6 +3,7 @@
 // license that can be found in the LICENSE file.
 
 //go:build !darwin && !linux
+// +build !darwin,!linux
 
 package ld
 
diff --git a/src/cmd/link/internal/ld/outbuf_nommap.go b/src/cmd/link/internal/ld/outbuf_nommap.go
index b1d3d2724f..4154981b09 100644
--- a/src/cmd/link/internal/ld/outbuf_nommap.go
+++ b/src/cmd/link/internal/ld/outbuf_nommap.go
@@ -3,6 +3,15 @@
 // license that can be found in the LICENSE file.
 
 //go:build !aix && !darwin && !dragonfly && !freebsd && !linux && !netbsd && !openbsd && !(solaris && go1.20) && !windows
+// +build !aix
+// +build !darwin
+// +build !dragonfly
+// +build !freebsd
+// +build !linux
+// +build !netbsd
+// +build !openbsd
+// +build !solaris !go1.20
+// +build !windows
 
 package ld