//
// # Escaped Paths
//
// Module paths appear as substrings of file system paths
// (in the download cache) and of web server URLs in the proxy protocol.
// In general we cannot rely on file systems to be case-sensitive,
// nor can we rely on web servers, since they read from file systems.
// That is, we cannot rely on the file system to keep rsc.io/QUOTE
// and rsc.io/quote separate. Windows and macOS don't.

<!-- go.dev/issue/67001 -->
Go 1.23 is the last release that requires Linux kernel version 2.6.32 or later. Go 1.24 will require Linux kernel version 3.17 or later, with an exception that systems running 3.10 or later will continue to be supported if the kernel has been patched to support the getrandom system call.

### OpenBSD {#openbsd}

<!-- go.dev/issue/55999, CL 518629, CL 518630 -->

can be easily selected, incorporated, and reused in a wide range of
driver programs including command-line tools (such as vet), text editors and
IDEs, build and test systems (such as go build, Bazel, or Buck), test
frameworks, code review tools, code-base indexers (such as SourceGraph),
documentation viewers (such as godoc), batch pipelines for large code
bases, and so on.

# Analyzer

	Regions() []Region
}

var (
	// Supported defines a Coverage that lists all supported subtags. Tags
	// always returns nil.
	Supported Coverage = allSubtags{}
)

// TODO:
// - Support Variants, numbering systems.
// - CLDR coverage levels.
// - Set of common tags defined in this package.

type allSubtags struct{}

// Regions returns the list of supported regions. As all regions are in a

		}
	}
	// Another disambiguator: If the argument starts with an upper
	// case letter, it can only be a symbol in the current directory.
	// Kills the problem caused by case-insensitive file systems
	// matching an upper case name as a package name.
	if !strings.ContainsAny(arg, `/\`) && token.IsExported(arg) {
		pkg, err := build.ImportDir(".", build.ImportComment)
		if err == nil {
			return pkg, "", arg, false

To declare the code location, an import path of the form

	repository.vcs/path

specifies the given repository, with or without the .vcs suffix,
using the named version control system, and then the path inside
that repository. The supported version control systems are:

	Bazaar      .bzr
	Fossil      .fossil
	Git         .git
	Mercurial   .hg
	Subversion  .svn

For example,

	import "example.org/user/foo.hg"

	}
	if bits.UintSize == 64 {
		// mix is only defined on 64-bit architectures
		want["runtime"] = append(want["runtime"], "mix")
		// (*Bool).CompareAndSwap is just over budget on 32-bit systems (386, arm).
		want["sync/atomic"] = append(want["sync/atomic"], "(*Bool).CompareAndSwap")
	}

	switch runtime.GOARCH {
	case "386", "wasm", "arm":
	default:

Scripts also have access to other environment variables, including:

	GOARCH=<target GOARCH>
	GOCACHE=<actual GOCACHE being used outside the test>
	GOEXE=<executable file suffix: .exe on Windows, empty on other systems>
	GOOS=<target GOOS>
	GOPATH=$WORK/gopath
	GOPROXY=<local module proxy serving from cmd/go/testdata/mod>
	GOROOT=<actual GOROOT>
	TESTGO_GOROOT=<GOROOT used to build cmd/go, for use in tests that may change GOROOT>

// from any known operating system and architecture.
// We could in principle add binaries to testdata and check
// all the supported systems during this test. However, the
// binaries would be about 1 MB each, and we don't want to
// add that much junk to the hg repository. Instead, build a
// binary for the current system (only) and test that objdump
// can handle that one.

#includes and processing the corresponding C code. That would require
a full C parser and type checker that was also aware of any extensions
known to the system compiler (for example, all the GNU C extensions) as
well as the system-specific header locations and system-specific
pre-#defined macros. This is certainly possible to do, but it is an
enormous amount of work.

Cgo takes a different approach. It determines the meaning of C