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cmd/go, cmd/link: -buildmode=pie for linux/amd64

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Depends on external linking right now. I have no immediate use for
this, but wanted to check how hard it is to support as android/amd64
is coming and it will require PIE.

Change-Id: I65c6b19159f40db4c79cf312cd0368c2b2527bfd
Reviewed-on: https://go-review.googlesource.com/16072
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Run-TryBot: David Crawshaw <crawshaw@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
David Crawshaw 2015-10-19 16:31:20 -04:00
parent 22d4c8bf13
commit b7e4de4b1e
6 changed files with 50 additions and 4 deletions
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8
src/cmd/link/internal/ld/lib.go
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@ -303,7 +303,7 @@ func (mode *BuildMode) Set(s string) error {
*mode = BuildmodeExe
case "pie":
switch goos {
case "android":
case "android", "linux":
default:
return badmode()
}
@ -516,6 +516,12 @@ func loadlib() {
Linkmode = LinkExternal
}
// Force external linking for PIE executables, as
// internal linking does not support TLS_IE.
if Buildmode == BuildmodePIE {
Linkmode = LinkExternal
}
// cgo on Darwin must use external linking
// we can always use external linking, but then there will be circular
// dependency problems when compiling natively (external linking requires