diff options
author | Dave Cheney <dave@cheney.net> | 2014-03-24 12:34:09 +1100 |
---|---|---|
committer | Dave Cheney <dave@cheney.net> | 2014-03-24 12:34:09 +1100 |
commit | c3df2e2cc71f889a5553b77eb67d25cf38844702 (patch) | |
tree | 5aa67142f4194380acf7c91a4566671158e3020c /misc | |
parent | 0437f351f6bc370c581cba505b35b2bdc7990ca9 (diff) | |
download | go-c3df2e2cc71f889a5553b77eb67d25cf38844702.tar.gz |
misc/nacl: add Native Client support scripts and documentation
LGTM=josharian, dan.kortschak
R=golang-codereviews, josharian, dan.kortschak
CC=golang-codereviews
https://codereview.appspot.com/75080043
Diffstat (limited to 'misc')
-rw-r--r-- | misc/nacl/README | 65 | ||||
-rwxr-xr-x | misc/nacl/go_nacl_386_exec | 10 | ||||
-rwxr-xr-x | misc/nacl/go_nacl_amd64p32_exec | 10 |
3 files changed, 85 insertions, 0 deletions
diff --git a/misc/nacl/README b/misc/nacl/README new file mode 100644 index 000000000..e9f0e5654 --- /dev/null +++ b/misc/nacl/README @@ -0,0 +1,65 @@ +Native Client +============= + +This document outlines the basics of building and developing the Go runtime and programs in the Native Client (NaCl) environment. + +Go 1.3 supports two architectures + + * nacl/386 which is standard 386. + * nacl/amd64p32 which is a 64 bit architecture, where the address space is limited to a 4gb window. + +For background it is recommended that you read http://golang.org/s/go13nacl. + +Prerequisites +------------- + +Native Client programs are executed inside a sandbox, the NaCl runtime. This runtime must be installed before you can use NaCl programs. + +The NaCl distribution comes with an installer which ensures you have access to the latest version of the runtime. The version tracks the Chome numbering scheme. + +# Download NaCl + +Download nacl_sdk.zip file from https://developers.google.com/native-client/dev/sdk/download, and unpack it. I chose /opt/nacl_sdk + +# Update + +The zip file contains a small skeleton that can be used to download the correct sdk. These are released every 6-8 weeks, in line with Chrome releases. + + % cd /opt/nacl_sdk + % ./naclsdk update + +At this time pepper_33 is the stable version. If naclsdk downloads a later version, please adjust accordingly. + +The cmd/go helper scripts expect that the runtime loaders, sel_ldr_x86_{32,64} are in your path. I find it easiest to make a symlink from the NaCl distribution to my $GOPATH/bin directory. + + % ln -nfs /opt/nacl_sdk/pepper_33/tools/sel_ldr_x86_32 $GOPATH/bin/sel_ldr_x86_32 + % ln -nfs /opt/nacl_sdk/pepper_33/tools/sel_ldr_x86_64 $GOPATH/bin/sel_ldr_x86_64 + +Support scripts +--------------- + +Symlink the two scripts in this directory into your $PATH, just as you did with NaCl sdk above. + + % ln -nfs $GOROOT/go/misc/nacl/go_nacl_amd64p32_exec $GOPATH/bin/go_nacl_amd64p32_exec + % ln -nfs $GOROOT/go/misc/nacl/go_nacl_386_exec $GOPATH/bin/go_nacl_386_exec + +Building and testing +-------------------- + +Building for NaCl is similar to cross compiling for other platforms. However, as it is not possible to ever build in a `native` NaCl environment, the cmd/go tool has been enhanced to allow the full build, all.bash, to be executed, rather than just the compile stage, make.bash. + +The cmd/go tool knows that if GOOS is set to `nacl` it should not try to execute any binaries itself. Instead it passes their execution to a support script which sets up a Native Client environment and invokes the NaCl sandbox. + +The script's name has a special format, go_$GOOS_$GOARCH_exec, so cmd/go can find it. + +In short, if the support scripts are in place, the cmd/go tool can be used as per normal. + +# Build the Go toolchain. + + % cd go/src + % env GOOS=nacl GOARCH=amd64p32 ./make.bash + +# Test the Go toolchain. + + % cd go/src + % env GOOS=nacl GOARCH=amd64p32 ./run.bash diff --git a/misc/nacl/go_nacl_386_exec b/misc/nacl/go_nacl_386_exec new file mode 100755 index 000000000..9cff63556 --- /dev/null +++ b/misc/nacl/go_nacl_386_exec @@ -0,0 +1,10 @@ +#!/bin/bash + +eval $(go env) + +export NACLENV_GOARCH=$GOARCH +export NACLENV_GOOS=$GOOS +export NACLENV_GOROOT=/go +export NACLENV_NACLPWD=$(pwd | sed "s;$GOROOT;/go;") + +exec sel_ldr_x86_32 -l /dev/null -S -e "$@" diff --git a/misc/nacl/go_nacl_amd64p32_exec b/misc/nacl/go_nacl_amd64p32_exec new file mode 100755 index 000000000..0a5ed651f --- /dev/null +++ b/misc/nacl/go_nacl_amd64p32_exec @@ -0,0 +1,10 @@ +#!/bin/bash + +eval $(go env) + +export NACLENV_GOARCH=$GOARCH +export NACLENV_GOOS=$GOOS +export NACLENV_GOROOT=/go +export NACLENV_NACLPWD=$(pwd | sed "s;$GOROOT;/go;") + +exec sel_ldr_x86_64 -l /dev/null -S -e "$@" |