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cmd/cgo: cgo build fails with panic building trivial code on M1 Mac (darwin/arm64) #53193

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SamJakob opened this issue Jun 2, 2022 · 4 comments
Closed

cmd/cgo: cgo build fails with panic building trivial code on M1 Mac (darwin/arm64) #53193

SamJakob opened this issue Jun 2, 2022 · 4 comments
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@SamJakob
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SamJakob commented Jun 2, 2022

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

$ go version
go version go1.18.3 darwin/arm64

Does this issue reproduce with the latest release?

Yes

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

go env Output
$ go env
GO111MODULE="on"
GOARCH="arm64"
GOBIN=""
GOCACHE="/Users/samjakob/Library/Caches/go-build"
GOENV="/Users/samjakob/Library/Application Support/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=" -mod="
GOHOSTARCH="arm64"
GOHOSTOS="darwin"
GOINSECURE=""
GOMODCACHE="/Users/samjakob/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="darwin"
GOPATH="/Users/samjakob/go"
GOPRIVATE=""
GOPROXY="https://proxy.golang.org,direct"
GOROOT="/usr/local/go"
GOSUMDB="sum.golang.org"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_arm64"
GOVCS=""
GOVERSION="go1.18.3"
GCCGO="gccgo"
AR="ar"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD="/Users/samjakob/GolandProjects/TestProject/go.mod"
GOWORK=""
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 arm64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/gd/xv3ph82d1w16g5hbmvwgvr9h0000gn/T/go-build1374085631=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

Created a trivial project and attempted to build it on M1 Mac (darwin/arm64) with go build.
Please see here: https://github.com/SamJakob/go_test_project

What did you expect to see?

Successful build.

What did you see instead?

$ go build
# TestProject
panic: unexpected 32-bit segment

goroutine 1 [running]:
cmd/link/internal/ld.machoCombineDwarf(0x1024fbc88?, 0x140000a8050?, 0x1400008e000, {0x14000e440a0?, 0x1?}, {0x14001040000, 0x53})
        /usr/local/go/src/cmd/link/internal/ld/macho_combine_dwarf.go:218 +0x1024
cmd/link/internal/ld.(*Link).hostlink(0x14000158000)
        /usr/local/go/src/cmd/link/internal/ld/lib.go:1709 +0x4b9c
cmd/link/internal/ld.Main(_, {0x10, 0x20, 0x1, 0x1f, 0x1e, 0x7c00000, {0x10243950c, 0x14}, {0x10243cc69, ...}, ...})
        /usr/local/go/src/cmd/link/internal/ld/main.go:373 +0x143c
main.main()
        /usr/local/go/src/cmd/link/main.go:69 +0xc5c
@erifan
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erifan commented Jun 2, 2022

I downloaded your code but can't reproduce the issue on my M1 mac.

@SamJakob
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SamJakob commented Jun 2, 2022

I downloaded your code but can't reproduce the issue on my M1 mac.

Oh weird... I figured it was probably a somewhat niche error because I couldn't find much for it on the internet but honestly not even sure how to go about fixing...

What is your OS version?

@erifan
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erifan commented Jun 2, 2022

What is your OS version?

20.6.0

@SamJakob
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SamJakob commented Jun 2, 2022 •
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Closing. Just tried this in another shell (bash) instead of my default (zsh) and it worked, so evidently I have some non-standard compiler or linker in my path.
Thank you!

EDIT: For completeness sake; it was a Homebrew version of LLVM that I had included in my PATH, removing this caused everything to work correctly.
export PATH="/opt/homebrew/opt/llvm/bin:$PATH"

@SamJakob SamJakob closed this as completed Jun 2, 2022
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