link

Documentation

Overview

Link, typically invoked as “go tool link,” reads the Go archive or object for a package main, along with its dependencies, and combines them into an executable binary.

Command Line

Usage:

go tool link [flags] main.a

Flags:

-B note
	Add an ELF_NT_GNU_BUILD_ID note when using ELF.
	The value should start with 0x and be an even number of hex digits.
-D address
	Set data segment address.
-E entry
	Set entry symbol name.
-H type
	Set executable format type.
	The default format is inferred from GOOS and GOARCH.
	On Windows, -H windowsgui writes a "GUI binary" instead of a "console binary."
-I interpreter
	Set the ELF dynamic linker to use.
-L dir1 -L dir2
	Search for imported packages in dir1, dir2, etc,
	after consulting $GOROOT/pkg/$GOOS_$GOARCH.
-R quantum
	Set address rounding quantum.
-T address
	Set text segment address.
-V
	Print linker version and exit.
-X importpath.name=value
	Set the value of the string variable in importpath named name to value.
	This is only effective if the variable is declared in the source code either uninitialized
	or initialized to a constant string expression. -X will not work if the initializer makes
	a function call or refers to other variables.
	Note that before Go 1.5 this option took two separate arguments.
-a
	Disassemble output.
-buildid id
	Record id as Go toolchain build id.
-buildmode mode
	Set build mode (default exe).
-c
	Dump call graphs.
-compressdwarf
	Compress DWARF if possible (default true).
-cpuprofile file
	Write CPU profile to file.
-d
	Disable generation of dynamic executables.
	The emitted code is the same in either case; the option
	controls only whether a dynamic header is included.
	The dynamic header is on by default, even without any
	references to dynamic libraries, because many common
	system tools now assume the presence of the header.
-debugtramp int
	Debug trampolines.
-dumpdep
	Dump symbol dependency graph.
-extar ar
	Set the external archive program (default "ar").
	Used only for -buildmode=c-archive.
-extld linker
	Set the external linker (default "clang" or "gcc").
-extldflags flags
	Set space-separated flags to pass to the external linker.
-f
	Ignore version mismatch in the linked archives.
-g
	Disable Go package data checks.
-importcfg file
	Read import configuration from file.
	In the file, set packagefile, packageshlib to specify import resolution.
-installsuffix suffix
	Look for packages in $GOROOT/pkg/$GOOS_$GOARCH_suffix
	instead of $GOROOT/pkg/$GOOS_$GOARCH.
-k symbol
	Set field tracking symbol. Use this flag when GOEXPERIMENT=fieldtrack is set.
-libgcc file
	Set name of compiler support library.
	This is only used in internal link mode.
	If not set, default value comes from running the compiler,
	which may be set by the -extld option.
	Set to "none" to use no support library.
-linkmode mode
	Set link mode (internal, external, auto).
	This sets the linking mode as described in cmd/cgo/doc.go.
-linkshared
	Link against installed Go shared libraries (experimental).
-memprofile file
	Write memory profile to file.
-memprofilerate rate
	Set runtime.MemProfileRate to rate.
-msan
	Link with C/C++ memory sanitizer support.
-n
	Dump symbol table.
-o file
	Write output to file (default a.out, or a.out.exe on Windows).
-pluginpath path
	The path name used to prefix exported plugin symbols.
-r dir1:dir2:...
	Set the ELF dynamic linker search path.
-race
	Link with race detection libraries.
-s
	Omit the symbol table and debug information.
-shared
	Generated shared object (implies -linkmode external; experimental).
-tmpdir dir
	Write temporary files to dir.
	Temporary files are only used in external linking mode.
-u
	Reject unsafe packages.
-v
	Print trace of linker operations.
-w
	Omit the DWARF symbol table.