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cmd/go: -x flag doesn't print executable output if cgo is used #21427

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hirochachacha opened this issue Aug 13, 2017 · 4 comments
Closed

cmd/go: -x flag doesn't print executable output if cgo is used #21427

hirochachacha opened this issue Aug 13, 2017 · 4 comments
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
Milestone
Go1.10

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@hirochachacha
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Please answer these questions before submitting your issue. Thanks!

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

package main

import "C"

func main() {}
$ go build -x x.go 2> test.bash
$ bash test.bash

What did you expect to see?

no errors.

What did you see instead?

test.bash: line 5: -O2: command not found
clang: error: no such file or directory: 'trivial.c'
clang: error: no input files
clang: error: no such file or directory: 'trivial.c'
clang: error: no input files
clang: error: no such file or directory: '_cgo_export.c'
clang: error: no input files
clang: error: no such file or directory: 'x.cgo2.c'
clang: error: no input files
clang: error: no such file or directory: '_cgo_main.c'
clang: error: no input files
clang: error: no such file or directory: '/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/_cgo_main.o'
clang: error: no such file or directory: '/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/_cgo_export.o'
clang: error: no such file or directory: '/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/x.cgo2.o'
clang: error: no input files
cannot parse /var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/_cgo_.o as ELF, Mach-O or PE
clang: error: unknown argument: '-no-pie'
clang: error: no such file or directory: 'trivial.c'
clang: error: no input files
clang: error: no such file or directory: 'trivial.c'
clang: error: no input files
clang: error: no such file or directory: '/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/_cgo_export.o'
clang: error: no such file or directory: '/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/x.cgo2.o'
/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/_cgo_gotypes.go:0:0: open /var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/_cgo_gotypes.go: no such file or directory
test.bash: line 22: pack: command not found
/Users/hiro/go/pkg/tool/darwin_amd64/link: cannot open file /var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments.a: open /var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments.a: no such file or directory
mv: /var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build826286268/command-line-arguments/_obj/exe/a.out: No such file or directory

Does this issue reproduce with the latest release (go1.8.3)?

I think so.

System details

go version devel +09ed0f6805 Sun Aug 13 10:08:42 2017 +0000 darwin/amd64
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/hiro/.go"
GORACE=""
GOROOT="/Users/hiro/go"
GOTOOLDIR="/Users/hiro/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/wq/dwn8hs0x7njbzty9f68y61700000gn/T/go-build794106771=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOROOT/bin/go version: go version devel +09ed0f6805 Sun Aug 13 10:08:42 2017 +0000 darwin/amd64
GOROOT/bin/go tool compile -V: compile version devel +09ed0f6805 Sun Aug 13 10:08:42 2017 +0000
uname -v: Darwin Kernel Version 16.7.0: Thu Jun 15 17:36:27 PDT 2017; root:xnu-3789.70.16~2/RELEASE_X86_64
ProductName:	Mac OS X
ProductVersion:	10.12.6
BuildVersion:	16G29
lldb --version: lldb-370.0.42
  Swift-3.1
gdb --version: GNU gdb (GDB) 7.12.1

Maybe this is not a bug report, but a feature request.
I think producing real commands is helpful for debugging.
@ianlancetaylor
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The problem is in the display of CGO_LDFLAGS. It probably needs to be fixed in Builder.runOut in cmd/go/internal/work/build.go.

@ianlancetaylor ianlancetaylor added this to the Go1.10 milestone Aug 14, 2017
@ianlancetaylor ianlancetaylor added the NeedsFix The path to resolution is known, but the work has not been done. label Aug 14, 2017
@hirochachacha
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Thanks. I'll take a look.

@gopherbot
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Change https://golang.org/cl/55350 mentions this issue: cmd/go: print executable shell command if -x flag is used

@gopherbot
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Change https://golang.org/cl/84736 mentions this issue: cmd/go: make -x output commands executable again

@golang golang locked and limited conversation to collaborators Dec 19, 2018
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FrozenDueToAge NeedsFix The path to resolution is known, but the work has not been done.
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@hirochachacha @ianlancetaylor @gopherbot