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cmd/go: support -trimpath with gccgo

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Fixes #32162

Change-Id: I164665108fa8ae299229054bded82cb3b027bccb
Reviewed-on: https://go-review.googlesource.com/c/go/+/196023
Run-TryBot: Bryan C. Mills <bcmills@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Bryan C. Mills 2019-09-17 16:33:54 -04:00
parent d3595f7171
commit eb6ce1cff4
2 changed files with 38 additions and 14 deletions
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9
src/cmd/go/internal/work/gccgo.go
View File

@ -91,6 +91,10 @@ func (tools gccgoToolchain) gc(b *Builder, a *Action, archive string, importcfg
args = append(args, "-I", root)
}
}
if cfg.BuildTrimpath && b.gccSupportsFlag(args[:1], "-ffile-prefix-map=a=b") {
args = append(args, "-ffile-prefix-map="+base.Cwd+"=.")
args = append(args, "-ffile-prefix-map="+b.WorkDir+"=/tmp/go-build")
}
args = append(args, a.Package.Internal.Gccgoflags...)
for _, f := range gofiles {
args = append(args, mkAbs(p.Dir, f))
@ -535,7 +539,10 @@ func (tools gccgoToolchain) cc(b *Builder, a *Action, ofile, cfile string) error
defs = append(defs, "-fsplit-stack")
}
defs = tools.maybePIC(defs)
if b.gccSupportsFlag(compiler, "-fdebug-prefix-map=a=b") {
if b.gccSupportsFlag(compiler, "-ffile-prefix-map=a=b") {
defs = append(defs, "-ffile-prefix-map="+base.Cwd+"=.")
defs = append(defs, "-ffile-prefix-map="+b.WorkDir+"=/tmp/go-build")
} else if b.gccSupportsFlag(compiler, "-fdebug-prefix-map=a=b") {
defs = append(defs, "-fdebug-prefix-map="+b.WorkDir+"=/tmp/go-build")
}
if b.gccSupportsFlag(compiler, "-gno-record-gcc-switches") {

43
src/cmd/go/testdata/script/build_trimpath.txt vendored
View File

@ -16,10 +16,10 @@ grep -q $GOROOT_REGEXP hello.exe
go build -trimpath -o hello.exe hello.go
! grep -q $GOROOT_REGEXP hello.exe
! grep -q $WORK_REGEXP hello.exe
cd ..
# A binary from an external module built with -trimpath should not contain
# the current workspace or GOROOT.
cd $WORK
env GO111MODULE=on
go build -trimpath -o fortune.exe rsc.io/fortune
! grep -q $GOROOT_REGEXP fortune.exe
@ -27,18 +27,35 @@ go build -trimpath -o fortune.exe rsc.io/fortune
# Two binaries built from identical packages in different directories
# should be identical.
mkdir b
cp a/go.mod a/hello.go b
cd a
go build -trimpath -o ../a.exe .
cd ../b
go build -trimpath -o ../b.exe .
cd ..
cmp -q a.exe b.exe
cd $GOPATH/src/a
go build -trimpath -o $WORK/a-GOPATH.exe .
cd $WORK/_alt/src/a
go build -trimpath -o $WORK/a-alt.exe .
cmp -q $WORK/a-GOPATH.exe $WORK/a-alt.exe
-- a/hello.go --
[!exec:gccgo] stop
# Binaries built using gccgo should also be identical to each other.
env GO111MODULE=off # The current released gccgo does not support builds in module mode.
cd $GOPATH/src/a
go build -compiler=gccgo -trimpath -o $WORK/gccgo-GOPATH.exe .
env old_gopath=$GOPATH
env GOPATH=$WORK/_alt
cd $WORK/_alt/src/a
go build -compiler=gccgo -trimpath -o $WORK/gccgo-alt.exe .
cd $WORK
! grep -q $GOROOT_REGEXP gccgo-GOPATH.exe
! grep -q $WORK_REGEXP gccgo-GOPATH.exe
cmp -q gccgo-GOPATH.exe gccgo-alt.exe
-- $GOPATH/src/a/hello.go --
package main
func main() { println("hello") }
-- a/go.mod --
module m
-- $GOPATH/src/a/go.mod --
module example.com/a
-- $WORK/_alt/src/a/hello.go --
package main
func main() { println("hello") }
-- $WORK/_alt/src/a/go.mod --
module example.com/a