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doc: document GOAMD64 environment variable

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Update #47694

Change-Id: I9c90bd251616cd4d10434bd3b6e6c30c5c819e24
Reviewed-on: https://go-review.googlesource.com/c/go/+/363661
Trust: Keith Randall <khr@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Keith Randall 2021-11-12 15:48:01 -08:00
parent c2397905e0
commit dfa62c79de
1 changed files with 13 additions and 4 deletions
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17
doc/go1.18.html
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@ -40,6 +40,19 @@ Do not send CLs removing the interior tags from such phrases.
FreeBSD 13.0+ will require a kernel with the COMPAT_FREEBSD12 option set (this is the default). FreeBSD 13.0+ will require a kernel with the COMPAT_FREEBSD12 option set (this is the default).
</p> </p>
<h3 id="amd64">AMD64</h3>
<p><!-- CL 349595 -->
Go 1.18 introduces the new <code>GOAMD64</code> environment variable which selects
a version of the AMD64 architecture. Allowed values are <code>v1</code>,
<code>v2</code>, <code>v3</code>, or <code>v4</code>. Each higher level requires,
and takes advantage of, additional processor features. A detailed description of the
versions is <a href="https://en.wikipedia.org/wiki/X86-64#Microarchitecture_levels">here</a>.
</p>
<p>
The <code>GOAMD64</code> environment variable defaults to <code>v1</code>.
</p>
<h3 id="ppc64">PPC64</h3> <h3 id="ppc64">PPC64</h3>
<p><!-- CL 353969 --> <p><!-- CL 353969 -->
@ -123,10 +136,6 @@ Do not send CLs removing the interior tags from such phrases.
third-party tools that need to collect package source code.) third-party tools that need to collect package source code.)
</p> </p>
<p><!-- CL 349595 -->
TODO: <a href="https://golang.org/cl/349595">https://golang.org/cl/349595</a>: cmd/go: add GOAMD64 environment variable
</p>
<h3 id="gofmt"><code>gofmt</code></h3> <h3 id="gofmt"><code>gofmt</code></h3>
<p><!-- https://golang.org/issue/43566 --> <p><!-- https://golang.org/issue/43566 -->