golang/0004-cmd-link-use-gold-on-ARM-ARM64-only-if-gold-is-avail.patch

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From 5ccf9f47bf4f5ba53e0ab7338a7fd4626714cfb2 Mon Sep 17 00:00:00 2001
From: Jeffery To <jeffery.to@gmail.com>
Date: Tue, 23 Nov 2021 15:05:37 +0800
Subject: [PATCH] cmd/link: use gold on ARM/ARM64 only if gold is available
COPY relocation handling on ARM/ARM64 has been fixed in recent versions
of the GNU linker. This switches to gold only if gold is available.
Fixes #22040.
---
src/cmd/link/internal/ld/lib.go | 19 +++++++------------
1 file changed, 7 insertions(+), 12 deletions(-)
diff --git a/src/cmd/link/internal/ld/lib.go b/src/cmd/link/internal/ld/lib.go
index 9e13db7b71..2b379259a2 100644
--- a/src/cmd/link/internal/ld/lib.go
+++ b/src/cmd/link/internal/ld/lib.go
@@ -1390,25 +1390,20 @@ func (ctxt *Link) hostlink() {
}
if ctxt.Arch.InFamily(sys.ARM, sys.ARM64) && buildcfg.GOOS == "linux" {
- // On ARM, the GNU linker will generate COPY relocations
- // even with -znocopyreloc set.
+ // On ARM, older versions of the GNU linker will generate
+ // COPY relocations even with -znocopyreloc set.
// https://sourceware.org/bugzilla/show_bug.cgi?id=19962
//
- // On ARM64, the GNU linker will fail instead of
- // generating COPY relocations.
+ // On ARM64, older versions of the GNU linker will fail
+ // instead of generating COPY relocations.
//
- // In both cases, switch to gold.
- altLinker = "gold"
-
- // If gold is not installed, gcc will silently switch
- // back to ld.bfd. So we parse the version information
- // and provide a useful error if gold is missing.
+ // In both cases, switch to gold if gold is available.
name, args := flagExtld[0], flagExtld[1:]
args = append(args, "-fuse-ld=gold", "-Wl,--version")
cmd := exec.Command(name, args...)
if out, err := cmd.CombinedOutput(); err == nil {
- if !bytes.Contains(out, []byte("GNU gold")) {
- log.Fatalf("ARM external linker must be gold (issue #15696), but is not: %s", out)
+ if bytes.Contains(out, []byte("GNU gold")) {
+ altLinker = "gold"
}
}
}
--
2.32.0