cmd/dist: make.bash --no-clean fails when compilation target doesn't support regabi

[rhysh]

What version of Go are you using (go version)?

$ go version
go version go1.17rc1 darwin/amd64
$ go version
go version go1.16.6 darwin/amd64
$ go version
go version devel go1.17-60ddf42b46 Wed Jul 14 17:25:06 2021 +0000 darwin/amd64

Does this issue reproduce with the latest release?

This problem is present in go1.17rc1 and tip. It is not present in go1.16.6.

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/Users/rhys/Library/Caches/go-build"
GOENV="/Users/rhys/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/rhys/go/pkg/mod"
GONOPROXY="*"
GONOSUMDB="*"
GOOS="darwin"
GOPATH="/Users/rhys/go"
GOPRIVATE="*"
GOPROXY="direct"
GOROOT="/usr/local/go"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GOVCS=""
GOVERSION="devel go1.17-60ddf42b46 Wed Jul 14 17:25:06 2021 +0000"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/dev/null"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -arch x86_64 -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/49/zmds5zsn75z1283vtzxyfr5hj7yjq4/T/go-build4254228305=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

$ cd ./src
$ ./make.bash
$ GOOS=linux GOARCH=386 ./make.bash --no-clean

What did you expect to see?

$ go version
go version go1.16.6 darwin/amd64

$ ./make.bash
Building Go cmd/dist using /Users/rhys/go/version/go1.4. (go1.4-bootstrap-20170531 darwin/amd64)
Building Go toolchain1 using /Users/rhys/go/version/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for darwin/amd64.
---
Installed Go for darwin/amd64 in /usr/local/go
Installed commands in /usr/local/go/bin

$ GOOS=linux GOARCH=386 ./make.bash --no-clean
Building Go cmd/dist using /Users/rhys/go/version/go1.4. (go1.4-bootstrap-20170531 darwin/amd64)
Building Go toolchain1 using /Users/rhys/go/version/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for host, darwin/amd64.
Building packages and commands for target, linux/386.
---
Installed Go for linux/386 in /usr/local/go
Installed commands in /usr/local/go/bin

What did you see instead?

$ go version
go version devel go1.17-60ddf42b46 Wed Jul 14 17:25:06 2021 +0000 darwin/amd64

$ ./make.bash
Building Go cmd/dist using /Users/rhys/go/version/go1.4. (go1.4-bootstrap-20170531 darwin/amd64)
Building Go toolchain1 using /Users/rhys/go/version/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for darwin/amd64.
---
Installed Go for darwin/amd64 in /usr/local/go
Installed commands in /usr/local/go/bin

$ GOOS=linux GOARCH=386 ./make.bash --no-clean
Building Go cmd/dist using /Users/rhys/go/version/go1.4. (go1.4-bootstrap-20170531 darwin/amd64)
Building Go toolchain1 using /Users/rhys/go/version/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
/usr/local/go/src/cmd/go/main.go:10:2: import /usr/local/go/pkg/darwin_amd64/context.a: object is [go object darwin amd64 devel go1.17-60ddf42b46 Wed Jul 14 17:25:06 2021 +0000 X:regabiwrappers,regabig,regabireflect,regabidefer,regabiargs
] expected [go object darwin amd64 devel go1.17-60ddf42b46 Wed Jul 14 17:25:06 2021 +0000 X:
]

go tool dist: FAILED: /usr/local/go/pkg/tool/darwin_amd64/compile -std -pack -o /var/folders/49/zmds5zsn75z1283vtzxyfr5hj7yjq4/T/go-tool-dist-791323986/cmd/go/_go_.a -p main -importcfg /var/folders/49/zmds5zsn75z1283vtzxyfr5hj7yjq4/T/go-tool-dist-791323986/cmd/go/importcfg /usr/local/go/src/cmd/go/alldocs.go /usr/local/go/src/cmd/go/go11.go /usr/local/go/src/cmd/go/main.go: exit status 2
Building Go toolchain2 using go_bootstrap and Go toolchain1.
go tool dist: FAILED: /usr/local/go/pkg/tool/darwin_amd64/go_bootstrap install -gcflags=all= -ldflags=all= -i cmd/asm cmd/cgo cmd/compile cmd/link: fork/exec /usr/local/go/pkg/tool/darwin_amd64/go_bootstrap: no such file or directory

[rhysh]

FWIW, git bisect points to fd3612e as the first bad commit.

@bcmills (or @mdempsky ), is this part of the build your domain?

$ git bisect start
$ git bisect bad origin/master
$ git bisect good $(git merge-base origin/master go1.16.6)
[snip]
$ git bisect run bash -c 'cd ./src ; ./make.bash || exit 125 ; GOOS=linux GOARCH=386 ./make.bash --no-clean'
[snip]
fd3612e4339d10a0e02571a8e43868d569b11a9f is the first bad commit
[snip]
bisect run success

[mdempsky]

I'm still investigating this and don't have any obvious/simple fix just yet. Before I dig too much further, what's the use case for make.bash --no-clean? I feel like it used to be needed for getting a cross-compiler toolchain setup, but the toolchain has supported cross-compiling as a runtime knob for a while now. Is simply dropping --no-clean an option here? If not, what's the present day need for it still?

/cc @ianlancetaylor

[mrutter-amzn]

The use-case appears to have been for getting the cross-compiler toolchain setup. Removing the flag from our setup appears to be an option.

[mdempsky]

@mrutter-amzn Thanks. To clarify, you're talking about the same setup that @rhysh originally reported about? Or a separate one?

[ianlancetaylor]

The --no-clean option is from https://golang.org/cl/5673056 which says

Makes it possible to run

GOARCH=amd64 make.bash
GOARCH=386 make.bash --no-clean

to avoid deleting some of the work done by the first one.

So basically I think it's to make the build faster. And it may be the case that it does make the build slightly faster even today, as it doesn't have to relink the host binaries.

I assume the problem with --no-clean here is the explicit GOEXPERIMENT=none added by cmdbootstrap. If we left that out I would expect that things would work, or, at least, that we wouldn't have this particular problem. That was added by https://golang.org/cl/302050. CC @aclements

[rhysh]

Yes, same issue. The build script @mrutter-amzn and I are debugging has specified that flag for several years, but removing it allows the build to succeed—and for the resulting toolchain to work as we need. I don't know how much duplicate compile/link time we'd save if the flag worked.

[mdempsky]

I tried removing GOEXPERIMENT=none, and instead the resulting go_bootstrap binary crashes:

Building Go cmd/dist using /usr/local/google/home/mdempsky/wd/go1.4. (go1.4.3 linux/amd64)
Building Go toolchain1 using /usr/local/google/home/mdempsky/wd/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
unexpected fault address 0x9a7d0
fatal error: fault
[signal SIGSEGV: segmentation violation code=0x1 addr=0x9a7d0 pc=0x4c9fb4]

goroutine 17 [running]:
runtime.throw({0x7eacb7, 0x7eff9e39be30})
	/usr/local/google/home/mdempsky/wd/go-fresh/src/runtime/panic.go:1198 +0x71 fp=0xc00009a690 sp=0xc00009a660 pc=0x4334f1
runtime.sigpanic()
	/usr/local/google/home/mdempsky/wd/go-fresh/src/runtime/signal_unix.go:742 +0x2f6 fp=0xc00009a6e0 sp=0xc00009a690 pc=0x448eb6
os.(*Process).Release(0xc0002b6840)
	/usr/local/google/home/mdempsky/wd/go-fresh/src/os/exec.go:116 +0x14 fp=0xc00009a710 sp=0xc00009a6e0 pc=0x4c9fb4
runtime.call32(0x0, 0x8264d0, 0xc00033a020, 0x20, 0x20, 0x20, 0xc00009a770)
	/usr/local/google/home/mdempsky/wd/go-fresh/src/runtime/asm_amd64.s:626 +0x49 fp=0xc00009a740 sp=0xc00009a710 pc=0x461aa9
runtime.runfinq()
	/usr/local/google/home/mdempsky/wd/go-fresh/src/runtime/mfinal.go:245 +0x389 fp=0xc00009a7e0 sp=0xc00009a740 pc=0x418349
runtime.goexit()
	/usr/local/google/home/mdempsky/wd/go-fresh/src/runtime/asm_amd64.s:1581 +0x1 fp=0xc00009a7e8 sp=0xc00009a7e0 pc=0x4635a1
created by runtime.createfing
	/usr/local/google/home/mdempsky/wd/go-fresh/src/runtime/mfinal.go:157 +0x45

...

Are there extra steps that cmd/dist needs to perform when compiling/linking binaries that use regabi?

[mdempsky]

Yes, same issue. The build script @mrutter-amzn and I are debugging has specified that flag for several years, but removing it allows the build to succeed—and for the resulting toolchain to work as we need. I don't know how much duplicate compile/link time we'd save if the flag worked.

SGTM, thanks.

FYI, my recommendation would be to just run "make.bash" once normally to build the host tools, and then run "GOARCH=... GOOS=... go install std" to pre-compile the standard library for each target platform that you're interested in. That should be even faster than make.bash --no-clean ever was.

With Go 1.16.6:

$ time sh -c "( export GOROOT_BOOTSTRAP=$HOME/wd/go1.4 && ./make.bash && GOARCH=386 ./make.bash --no-clean )"
Building Go cmd/dist using /usr/local/google/home/mdempsky/wd/go1.4. (go1.4.3 linux/amd64)
Building Go toolchain1 using /usr/local/google/home/mdempsky/wd/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for linux/amd64.
---
Installed Go for linux/amd64 in /usr/local/google/home/mdempsky/wd/go-fresh
Installed commands in /usr/local/google/home/mdempsky/wd/go-fresh/bin
Building Go cmd/dist using /usr/local/google/home/mdempsky/wd/go1.4. (go1.4.3 linux/amd64)
Building Go toolchain1 using /usr/local/google/home/mdempsky/wd/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for host, linux/amd64.
Building packages and commands for target, linux/386.
---
Installed Go for linux/386 in /usr/local/google/home/mdempsky/wd/go-fresh
Installed commands in /usr/local/google/home/mdempsky/wd/go-fresh/bin

real	1m50.453s
user	6m47.415s
sys	0m57.323s


$ time sh -c "( export GOROOT_BOOTSTRAP=$HOME/wd/go1.4 && ./make.bash && GOARCH=386 ./make.bash )"
Building Go cmd/dist using /usr/local/google/home/mdempsky/wd/go1.4. (go1.4.3 linux/amd64)
Building Go toolchain1 using /usr/local/google/home/mdempsky/wd/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for linux/amd64.
---
Installed Go for linux/amd64 in /usr/local/google/home/mdempsky/wd/go-fresh
Installed commands in /usr/local/google/home/mdempsky/wd/go-fresh/bin
Building Go cmd/dist using /usr/local/google/home/mdempsky/wd/go1.4. (go1.4.3 linux/amd64)
Building Go toolchain1 using /usr/local/google/home/mdempsky/wd/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for host, linux/amd64.
Building packages and commands for target, linux/386.
---
Installed Go for linux/386 in /usr/local/google/home/mdempsky/wd/go-fresh
Installed commands in /usr/local/google/home/mdempsky/wd/go-fresh/bin

real	2m38.429s
user	8m44.041s
sys	1m12.032s


$ time sh -c "( export GOROOT_BOOTSTRAP=$HOME/wd/go1.4 && ./make.bash && GOARCH=386 go install std )"
Building Go cmd/dist using /usr/local/google/home/mdempsky/wd/go1.4. (go1.4.3 linux/amd64)
Building Go toolchain1 using /usr/local/google/home/mdempsky/wd/go1.4.
Building Go bootstrap cmd/go (go_bootstrap) using Go toolchain1.
Building Go toolchain2 using go_bootstrap and Go toolchain1.
Building Go toolchain3 using go_bootstrap and Go toolchain2.
Building packages and commands for linux/amd64.
---
Installed Go for linux/amd64 in /usr/local/google/home/mdempsky/wd/go-fresh
Installed commands in /usr/local/google/home/mdempsky/wd/go-fresh/bin

real	1m17.707s
user	4m18.335s
sys	0m35.912s

[mdempsky]

I just checked, and

./make.bash
GOOS=windows ../bin/go install std cmd
GOOS=darwin ../bin/go install std cmd

and

./make.bash
GOOS=windows ./make.bash --no-clean
GOOS=darwin ./make.bash --no-clean

install the same list of file names in $GOROOT/bin and $GOROOT/pkg, and they mostly have identical file contents. (Out of 1237 files within those 2 directories, only 71 have different contents.)

It seems like a bug that they're not generating identical files, but I'm assuming the differences are just build IDs or file paths or something.

Either way, I think just using go install std cmd to install cross-build toolchain packages and binaries appears to be preferable to make.bash --no-clean, so I'm further inclined to say we should just drop --no-clean support.

sha256sum diff

--- /tmp/old-sums.txt	2021-07-15 14:37:24.209280043 -0700
+++ /tmp/new-sums.txt	2021-07-15 14:34:38.263065640 -0700
@@ -1,8 +1,8 @@
-c420b01ca1af0461e1b6de7a41793307ba33af6623098f4a534aaf995d76f819  bin/darwin_amd64/go
+77d6e38eda5b57ebe693ccd79f24c931f03ffdcf11b108de1f0aafac788949c7  bin/darwin_amd64/go
 b4d28f55a4bf3ccfbd7e08b415855b212206ae35c28cfefea310fb8c45902ae7  bin/darwin_amd64/gofmt
 c7c0634ae43369f97de8e77b724e85f322951dcd765c9c17f349dab6ac5c2450  bin/go
 8874ee4fda255239d8544f5125d8f8f8777f6b36d688e300686c1eb1c697f081  bin/gofmt
-8c8fb2e92f4bf0a6dbcf6e1f897ebc0b6e72769078bc8e9b7bc68cae4cd8f0c6  bin/windows_amd64/go.exe
+806078fd7dd880e38116aac1aabcaef6a5860c59dcc851cd33588ae54666239e  bin/windows_amd64/go.exe
 012ae7cd8079944417879858eaad7f51542f477876448cee269c7ab330b71083  bin/windows_amd64/gofmt.exe
 5151927050c45531c499df6a2026fcb00e8b92746e70679487c72bd8ce04ebda  pkg/darwin_amd64/archive/tar.a
 b6ed6cbe858b7e3f82938230fd6039b8024983fe09c465bcf914bc390ddd6aff  pkg/darwin_amd64/archive/zip.a
@@ -28,9 +28,9 @@
 3817a7ead490cbb05e4f0885d66883f780722db15e99552e7c79f918f343e2eb  pkg/darwin_amd64/cmd/compile/internal/types.a
 4647870d098bd9e539331e98b648f409ba356c1a6408b4f03b011074ce7d3aca  pkg/darwin_amd64/cmd/compile/internal/wasm.a
 4fdc59469521bf02c3b9c2330eab6ca9541e3daf78945aecf60e352396da788b  pkg/darwin_amd64/cmd/compile/internal/x86.a
-cb7a21e845cff01f361db0317ada500b7b88643642de5c0606e996d9b61f3acf  pkg/darwin_amd64/cmd/go/internal/auth.a
+882891d951611ef998ef175c0dd5a908b81a1934ba66fbfa9f31ad64babb52be  pkg/darwin_amd64/cmd/go/internal/auth.a
 4e27e165417c2ae60855a4ba75406abad38f5daa19ac83ffc818c1208e48a1b4  pkg/darwin_amd64/cmd/go/internal/base.a
-9e8793fe05a5e1a1abb01ae76c5d27f41368b02b8f2619827aa09e025750cf3a  pkg/darwin_amd64/cmd/go/internal/bug.a
+f472b730e25c29a4fd0c730d42b1c4788a3c892d06bc3eab9e25849bade44d6c  pkg/darwin_amd64/cmd/go/internal/bug.a
 c8f93e6c88680c8525aa3369260aef07e316cb2373edae0d1528fca98737eea0  pkg/darwin_amd64/cmd/go/internal/cache.a
 e2aab7a78771995af0a3217a6de6c82fd0eaac6a51239e1287cac9dbf666a4f9  pkg/darwin_amd64/cmd/go/internal/cfg.a
 f03ffd642095085055f02a430f9170c05aec8594a62e8d574b006d535addb59e  pkg/darwin_amd64/cmd/go/internal/clean.a
@@ -41,7 +41,7 @@
 cee99a07ab5eb0b2c7dff3794fad1acb57debc7dc3a7d4862e60e17833e5b1cc  pkg/darwin_amd64/cmd/go/internal/fmtcmd.a
 b1e51094156bb6cee698bf184f3fad7dce6d32f3062ce80f297fad9f143ca5c0  pkg/darwin_amd64/cmd/go/internal/fsys.a
 44cab2735f27e1cd5f96a677ccfee1d195a81a6b258185989c6dce178144c238  pkg/darwin_amd64/cmd/go/internal/generate.a
-5fd8c2c293c831eb2f19db8dd8eec22f2ad8ec69544a716a739897ee63352e17  pkg/darwin_amd64/cmd/go/internal/get.a
+4bb73a515b594e2c29a7be236e7213d97fdfddc89c7bab29ac20551bf678e7d3  pkg/darwin_amd64/cmd/go/internal/get.a
 1b19f138c71ccdaca5763ccceb076a12eb4b06862347bc166ec76438373b1e64  pkg/darwin_amd64/cmd/go/internal/help.a
 549a16d32c2961ed74ccffbcd45a412dbcd1bb54f08082bf1c346de21739d6df  pkg/darwin_amd64/cmd/go/internal/imports.a
 e0b4285ec1f53754b5b76e8cd3eb7777791f57656d1ee1ab9238cd499f7b45f9  pkg/darwin_amd64/cmd/go/internal/list.a
@@ -50,8 +50,8 @@
 01eb12784e0147e35e5f977c2d5d88de0a8f707498067f99d70743d6c633a7d3  pkg/darwin_amd64/cmd/go/internal/lockedfile/internal/filelock.a
 0bc8960c17e0f5367a138bbc200cfc20ddf0972b5c779f3de9451cc0ad1bd3e5  pkg/darwin_amd64/cmd/go/internal/modcmd.a
 06ce981952cb9c2c24281de1f27e454e0e8fc047d51389e9ca975f5f0ae3acac  pkg/darwin_amd64/cmd/go/internal/modconv.a
-d624b7f7418b54b6b84f095734d27abcb338ca1b54e5cee4917f03748a79c303  pkg/darwin_amd64/cmd/go/internal/modfetch.a
-fd047809191e66cc34dac83047260915d5f72d44fe9f7e2d4e96800b7e805577  pkg/darwin_amd64/cmd/go/internal/modfetch/codehost.a
+9fddfa0fe52d82a692298dc91de6a2eb2f07eb0eee451cc69a0a3c99553b8219  pkg/darwin_amd64/cmd/go/internal/modfetch.a
+59218f6e7dd88bc1283745ae11b4c9aedb2275f7ba82f34c5c38ce2fd67d541d  pkg/darwin_amd64/cmd/go/internal/modfetch/codehost.a
 4d0799f5881e5af69de885304e99fe5de1d43aafa4b188508bfe5caf141686c1  pkg/darwin_amd64/cmd/go/internal/modget.a
 9da58e176d9bcbeb76af453268f94bcefa9fcd464d2a0ae805f8c307e65d45ef  pkg/darwin_amd64/cmd/go/internal/modinfo.a
 b92c7e133aeb34003566fbba55e2df87995a684ee6d8bb4b1cd9599d78eab04a  pkg/darwin_amd64/cmd/go/internal/modload.a
@@ -66,10 +66,10 @@
 b8e45b4c17a5fb0ba3b8d9140e092bec22dbc8add557cb0e5acfcfd7fd689eb0  pkg/darwin_amd64/cmd/go/internal/tool.a
 bc3d63a1dcb9067adf2418ef30ef23e669425bdd6edf42f8df2f9be2f0ed73b5  pkg/darwin_amd64/cmd/go/internal/trace.a
 a560ca580381dfed6c8ea9ff10085a674a4a6a1992229da0c3d09f5f2c89cfd8  pkg/darwin_amd64/cmd/go/internal/txtar.a
-32b933d4ac1db67b58fbea66616f5c05f24c0dd84c1407744f7aa89ba67dd33c  pkg/darwin_amd64/cmd/go/internal/vcs.a
+dae8b85dd1ff62eee80e80d26bad728f009d8d6fbb2413c72e5cb26c92c7a49a  pkg/darwin_amd64/cmd/go/internal/vcs.a
 5942ca1c1e2686fc99455275dcece952d414c1f9eb4fd1003f28d64cd337840b  pkg/darwin_amd64/cmd/go/internal/version.a
 1d9400ba6bd4442d32c80ab499406a5d1938282dc8a097a5615cac23747f3797  pkg/darwin_amd64/cmd/go/internal/vet.a
-ed06405e4ef0502f9b5aed64430ed15402d3cf7728185aa7df6c9bd864968ab2  pkg/darwin_amd64/cmd/go/internal/web.a
+d742d2496026b63eb9a5885089647a3a641e8dd72d8a94f4ea4e255d52ab77d9  pkg/darwin_amd64/cmd/go/internal/web.a
 f2bd7f0b6e9158cfa0dc6f4341da35105eea06d1f9c78120708393c6a01e7f09  pkg/darwin_amd64/cmd/go/internal/work.a
 723988e1670caa9cebd9d20ab36992cbf9c1d44f3b8dd07eefee7cd7ce1c8b98  pkg/darwin_amd64/cmd/internal/archive.a
 1489d55a904dc151ceaaa31f1f8a6b1a88ee40671775b3433327eed11d63d71b  pkg/darwin_amd64/cmd/internal/bio.a
@@ -115,17 +115,17 @@
 4eea2b661c68d3df44af689026c92325278dd033ede29258517d9ae769928479  pkg/darwin_amd64/cmd/link/internal/sym.a
 29c1a998890c6d6d8b92f0eb652f473826453cae0162facbddc789ee385af08b  pkg/darwin_amd64/cmd/link/internal/wasm.a
 efdc6c0344769dfb1854ceef3dd97542d0ca10277f50b975f723a1d28849a714  pkg/darwin_amd64/cmd/link/internal/x86.a
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@@ -142,7 +142,7 @@
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@@ -205,7 +205,7 @@
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@@ -220,8 +220,8 @@
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@@ -246,7 +246,7 @@
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@@ -310,31 +310,31 @@
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@@ -385,10 +385,10 @@
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@@ -803,9 +803,9 @@
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@@ -839,9 +839,9 @@
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@@ -867,7 +867,7 @@
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@@ -908,7 +908,7 @@
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@@ -954,17 +954,17 @@
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@@ -981,14 +981,14 @@
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@@ -1045,7 +1045,7 @@
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@@ -1060,8 +1060,8 @@
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@@ -1085,7 +1085,7 @@
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@@ -1160,22 +1160,22 @@
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@@ -1226,10 +1226,10 @@
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[mdempsky]

Does anyone else want to weigh in on what to do with make.bash --no-clean? It doesn't look to be documented anywhere; and as reported above, it seems to just generate the same file set as go install std cmd but takes longer (because of repeating the 3-phase toolchain bootstrap). I'm still inclined to just remove it.

/cc @rsc @ianlancetaylor

[gopherbot]

Change https://golang.org/cl/341392 mentions this issue: src/make.*: remove --no-clean flag

[ianlancetaylor]

I don't care about the --no-clean option. It's fine with me if we remove it. Presumably we should just ignore it, and existing scripts ought to continue to work if perhaps a tiny bit slower.