cmd/go: TestScript/build_trimpath broken for gccgo #35617
Description
cmd/go.TestScript/build_trimpath seems to be failing at head with gccgo 8.3.0.
$ go test cmd/go '-run=TestScript/^build_trimpath$'
go test proxy running at GOPROXY=http://127.0.0.1:37513/mod
--- FAIL: TestScript (0.01s)
--- FAIL: TestScript/build_trimpath (1.26s)
script_test.go:192:
# A binary built without -trimpath should contain the current workspace
# and GOROOT for debugging and stack traces. (0.332s)
# A binary built with -trimpath should not contain the current workspace
# or GOROOT. (0.316s)
# A binary from an external module built with -trimpath should not contain
# the current workspace or GOROOT. (0.385s)
# Two binaries built from identical packages in different directories
# should be identical.
# TODO(golang.org/issue/35435): at the moment, they are not.
#mkdir $GOPATH/src/b
#cp $GOPATH/src/a/go.mod $GOPATH/src/b/go.mod
#cp $GOPATH/src/a/paths.go $GOPATH/src/b/paths.go
#cd $GOPATH/src/b
#go build -trimpath -o $WORK/paths-b.exe .
#cmp -q $WORK/paths-a.exe $WORK/paths-b.exe (0.000s)
# A binary built with gccgo without -trimpath should contain the current
# GOPATH and GOROOT. (0.205s)
> env GO111MODULE=off # The current released gccgo does not support builds in module mode.
> cd $GOPATH/src/a
$WORK/gopath/src/a
> go build -compiler=gccgo -o $WORK/gccgo-paths-a.exe .
> exec $WORK/gccgo-paths-a.exe $WORK/gccgo-paths-b.exe
[stderr]
2019/11/15 08:43:04 open $WORK/gccgo-paths-b.exe: no such file or directory
[exit status 1]
FAIL: testdata/script/build_trimpath.txt:44: unexpected command failure
FAIL
FAIL cmd/go 2.587s
$ gccgo --version
gccgo (Debian 8.3.0-6) 8.3.0
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This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.