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doc/install-source: create distinction between steps that involve "git clone"

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Prior doc implied that "git clone" was one way to obtain a go1.4
bootstrap toochain, but it did not state this outright. Further,
the doc did not make it explicit in the "Fetch the repository"
section that one must necessarily "git clone" a second time in
the (presumed-to-be-uncommon) case where "git clone" had already
been perfomed in the "compiler binaries" section.

Updates #33402

Change-Id: Id70a6587b6ee09aca13559d63868b75cb07dff1e
Reviewed-on: https://go-review.googlesource.com/c/go/+/188900
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
K. "pestophagous" Heller 2019-08-04 22:46:29 -07:00 committed by Ian Lance Taylor
parent 951143cf14
commit 9c1f14f376
1 changed files with 22 additions and 0 deletions
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@ -140,12 +140,16 @@ For example, <code>$GOROOT_BOOTSTRAP/bin/go</code> should be
the <code>go</code> command binary for the bootstrap toolchain.
</p>
<h3 id="bootstrapFromBinaryRelease">Bootstrap toolchain from binary release</h3>
<p>
To use a binary release as a bootstrap toolchain, see
<a href="/dl/">the downloads page</a> or use any other
packaged Go distribution.
</p>
<h3 id="bootstrapFromSource">Bootstrap toolchain from source</h3>
<p>
To build a bootstrap toolchain from source, use
either the git branch <code>release-branch.go1.4</code> or
@ -159,6 +163,17 @@ the environment, and run <code>make.bash</code> (or,
on Windows, <code>make.bat</code>).
</p>
<p>
Once the Go 1.4 source has been unpacked into your GOROOT_BOOTSTRAP directory,
you must keep this git clone instance checked out to branch
<code>release-branch.go1.4</code>. Specifically, do not attempt to reuse
this git clone in the later step named "Fetch the repository." The go1.4
bootstrap toolchain <b>must be able</b> to properly traverse the go1.4 sources
that it assumes are present under this repository root.
</p>
<h3 id="bootstrapFromCrosscompiledSource">Bootstrap toolchain from cross-compiled source</h3>
<p>
To cross-compile a bootstrap toolchain from source, which is
necessary on systems Go 1.4 did not target (for
@ -181,6 +196,8 @@ That tree can be copied to a machine of the given target type
and used as <code>GOROOT_BOOTSTRAP</code> to bootstrap a local build.
</p>
<h3 id="bootstrapFromGccgo">Bootstrap toolchain using gccgo</h3>
<p>
To use gccgo as the bootstrap toolchain, you need to arrange
for <code>$GOROOT_BOOTSTRAP/bin/go</code> to be the go tool that comes
@ -246,6 +263,11 @@ that if Go is checked out in <code>$HOME/go</code>, it will conflict with
the default location of <code>$GOPATH</code>.
See <a href="#gopath"><code>GOPATH</code></a> below.</p>
Reminder: If you opted to also compile the bootstrap binaries from source (in an
earlier section), you still need to <code>git clone</code> again at this point
(to checkout the latest <code>&lt;tag&gt;</code>), because you must keep your
go1.4 repository distinct.
<h2 id="head">(Optional) Switch to the master branch</h2>
<p>If you intend to modify the go source code, and