// Unless the platform requires external linking,
		// we disable cgo to get static binaries for cmd/go and cmd/pprof,
		// so that they work on systems without the same dynamic libraries
		// as the original build system.
		env = append(env, "CGO_ENABLED=0")
	}
	if isRelease || os.Getenv("GO_BUILDER_NAME") != "" {
		// Add -trimpath for reproducible builds of releases.

	os.Unsetenv("GOBIN")
	os.Unsetenv("GOPATH")
	os.Unsetenv("GIT_ALLOW_PROTOCOL")
	os.Setenv("HOME", "/test-go-home-does-not-exist")
	// On some systems the default C compiler is ccache.
	// Setting HOME to a non-existent directory will break
	// those systems. Disable ccache and use real compiler. Issue 17668.
	os.Setenv("CCACHE_DISABLE", "1")
	if cfg.Getenv("GOCACHE") == "" {

	isDebugInts := func(s string) bool {
		// Some systems use leading _ to denote non-assembly symbols.
		return s == "__cgodebug_ints" || s == "___cgodebug_ints"
	}
	isDebugFloats := func(s string) bool {
		// Some systems use leading _ to denote non-assembly symbols.
		return s == "__cgodebug_floats" || s == "___cgodebug_floats"
	}
	indexOfDebugStr := func(s string) int {
		// Some systems use leading _ to denote non-assembly symbols.

by default will only use git and hg to download code from public servers.
But it will use any known version control system (bzr, fossil, git, hg, svn)
to download code from private servers, defined as those hosting packages
matching the GOPRIVATE variable (see 'go help private'). The rationale behind
allowing only Git and Mercurial is that these two systems have had the most
attention to issues of being run as clients of untrusted servers. In contrast,

			}
			if ctxt.HeadType == objabi.Hwindows {
				loadWindowsHostArchives(ctxt)
			}
			if *flagLibGCC != "none" {
				hostArchive(ctxt, *flagLibGCC)
			}
			// For glibc systems, the linker setup used by GCC
			// looks like
			//
			//  GROUP ( /lib/x86_64-linux-gnu/libc.so.6
			//      /usr/lib/x86_64-linux-gnu/libc_nonshared.a
			//      AS_NEEDED ( /lib64/ld-linux-x86-64.so.2 ) )
			//

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Linux system calls.
// This file is compiled as ordinary Go code,
// but it is also input to mksyscall,
// which parses the //sys lines and generates system call stubs.
// Note that sometimes we use a lowercase //sys name and
// wrap it in our own nicer implementation.

package unix

import (

					}
				} else {
					interpreter = thearch.ELF.Linuxdynld
					// If interpreter does not exist, try musl instead.
					// This lets the same cmd/link binary work on
					// both glibc-based and musl-based systems.
					if _, err := os.Stat(interpreter); err != nil {
						if musl := thearch.ELF.LinuxdynldMusl; musl != "" {
							if _, err := os.Stat(musl); err == nil {
								interpreter = musl
							}
						}

		// subject to change. It would be nice to remove this special case
		// entirely, but it is surely very helpful to see progress being made
		// when tests are run on slow single-CPU ARM systems.
		//
		// If we're showing JSON output, then display output as soon as
		// possible even when multiple tests are being run: the JSON output
		// events are attributed to specific package tests, so interlacing them

			// It's a bit of a peculiar thing to disallow but quite mysterious
			// when it happens. See golang.org/issue/26708.
			fmt.Fprintf(os.Stderr, "go: warning: ignoring go.mod in system temp root %v\n", os.TempDir())
			if RootMode == NeedRoot {
				base.Fatal(ErrNoModRoot)
			}
			if !mustUseModules {
				return
			}
		} else {
			modRoots = []string{modRoot}
		}
	}

			allPatternIsRoot = true
		}
	}

	updateMatches := func(rs *Requirements, ld *loader) {
		for _, m := range matches {
			switch {
			case m.IsLocal():
				// Evaluate list of file system directories on first iteration.
				if m.Dirs == nil {
					matchModRoots := modRoots
					if opts.MainModule != (module.Version{}) {
						matchModRoots = []string{MainModules.ModRoot(opts.MainModule)}
					}