lang/golang/golang/patches/001-cmd-link-use-gold-on-ARM-ARM64-only-if-gold-is-available.patch

   1 From 5ccf9f47bf4f5ba53e0ab7338a7fd4626714cfb2 Mon Sep 17 00:00:00 2001
   2 From: Jeffery To <jeffery.to@gmail.com>
   3 Date: Tue, 23 Nov 2021 15:05:37 +0800
   4 Subject: [PATCH] cmd/link: use gold on ARM/ARM64 only if gold is available
   5
   6 COPY relocation handling on ARM/ARM64 has been fixed in recent versions
   7 of the GNU linker. This switches to gold only if gold is available.
   8
   9 Fixes #22040.
  10 ---
  11  src/cmd/link/internal/ld/lib.go | 19 +++++++------------
  12  1 file changed, 7 insertions(+), 12 deletions(-)
  13
  14 --- a/src/cmd/link/internal/ld/lib.go
  15 +++ b/src/cmd/link/internal/ld/lib.go
  16 @@ -1393,25 +1393,20 @@ func (ctxt *Link) hostlink() {
  17                 }
  18
  19                 if ctxt.Arch.InFamily(sys.ARM, sys.ARM64) && buildcfg.GOOS == "linux" {
  20 -                       // On ARM, the GNU linker will generate COPY relocations
  21 -                       // even with -znocopyreloc set.
  22 +                       // On ARM, older versions of the GNU linker will generate
  23 +                       // COPY relocations even with -znocopyreloc set.
  24                         // https://sourceware.org/bugzilla/show_bug.cgi?id=19962
  25                         //
  26 -                       // On ARM64, the GNU linker will fail instead of
  27 -                       // generating COPY relocations.
  28 +                       // On ARM64, older versions of the GNU linker will fail
  29 +                       // instead of generating COPY relocations.
  30                         //
  31 -                       // In both cases, switch to gold.
  32 -                       altLinker = "gold"
  33 -
  34 -                       // If gold is not installed, gcc will silently switch
  35 -                       // back to ld.bfd. So we parse the version information
  36 -                       // and provide a useful error if gold is missing.
  37 +                       // In both cases, switch to gold if gold is available.
  38                         name, args := flagExtld[0], flagExtld[1:]
  39                         args = append(args, "-fuse-ld=gold", "-Wl,--version")
  40                         cmd := exec.Command(name, args...)
  41                         if out, err := cmd.CombinedOutput(); err == nil {
  42 -                               if !bytes.Contains(out, []byte("GNU gold")) {
  43 -                                       log.Fatalf("ARM external linker must be gold (issue #15696), but is not: %s", out)
  44 +                               if bytes.Contains(out, []byte("GNU gold")) {
  45 +                                       altLinker = "gold"
  46                                 }
  47                         }
  48                 }