library that will be used when building with the -linkshared
		option. Packages named main are ignored.

	-buildmode=exe
		Build the listed main packages and everything they import into
		executables. Packages not named main are ignored.

	-buildmode=pie
		Build the listed main packages and everything they import into
		position independent executables (PIE). Packages not named

stdout '^example.com/r$'
stdout '^example.com/t$'
stdout '^example.com/u$'


# 'go list all' lists the fixpoint of iterating 'go list -deps -test' starting
# with the packages in the main module, then reducing to only the non-test
# variants of those packages.

go list -f $PKGFMT all
stdout -count=13 '^.'
stdout '^example.com/a$'
stdout '^example.com/b$'
stdout '^example.com/c$'
stdout '^example.com/d$'

		return a1
	})
}

// addTransitiveLinkDeps adds to the link action a all packages
// that are transitive dependencies of a1.Deps.
// That is, if a is a link of package main, a1 is the compile of package main
// and a1.Deps is the actions for building packages directly imported by
// package main (what the compiler needs). The linker needs all packages
// transitively imported by the whole program; addTransitiveLinkDeps

distinct from those stored in testdata directory; clean does not remove
those files.

For more about build flags, see 'go help build'.

For more about specifying packages, see 'go help packages'.
	`,
}

var (
	cleanI         bool // clean -i flag
	cleanR         bool // clean -r flag
	cleanCache     bool // clean -cache flag
	cleanFuzzcache bool // clean -fuzzcache flag

				// that provides any package imported by the main module.
				// 'go mod download' is typically run before testing packages in the
				// main module, so by default we shouldn't download the others
				// (which are presumed irrelevant to the packages in the main module).
				// See https://golang.org/issue/44435.
				//
				// However, we also need to load the full module graph, to ensure that

// We might need sums for multiple modules to verify the package is unique.
//
// TODO(#43653): consolidate multiple errors of this type into a single error
// that suggests a 'go get' command for root packages that transitively import
// packages from modules with missing sums. load.CheckPackageErrors would be
// a good place to consolidate errors, but we'll need to attach the import
// stack here.
type ImportMissingSumError struct {

	// If we already have a package for the given (path, dir)
	// pair, use it instead of doing a full import.
	// Checker.impMap only caches packages that are marked Complete
	// or fake (dummy packages for failed imports). Incomplete but
	// non-fake packages do require an import to complete them.
	key := importKey{path, dir}
	imp := check.impMap[key]
	if imp != nil {
		return imp
	}

		return true
	case *Interface:
		return !isTypeParam(t) || u.typeSet().underIs(func(u Type) bool {
			return u != nil && hasNil(u)
		})
	}
	return false
}

// samePkg reports whether packages a and b are the same.
func samePkg(a, b *Package) bool {
	// package is nil for objects in universe scope
	if a == nil || b == nil {
		return a == b
	}
	// a != nil && b != nil
	return a.path == b.path
}

to link a collection of packages into a single binary. By default, cmd/link will
present the same interface it does today:

	cmd/link main.a

produces a file named a.out, even if cmd/link does so by invoking the host
linker in external linking mode.

By default, cmd/link will decide the linking mode as follows: if the only
packages using cgo are those on a list of known standard library

	// All involved packages have the same name (template). Error messages should
	// disambiguate between text/template and html/template by printing the full
	// path.
	const (
		asrc = `package a; import "text/template"; func F(template.Template) {}; func G(int) {}`
		bsrc = `
package b

import (
	"a"
	"html/template"
)

func _() {