graphene/LibOS/glibc-ld.gold.patch

diff --git a/configure b/configure
index fc023d0..b71c1f9 100755
--- a/configure
+++ b/configure
@@ -630,7 +630,8 @@ SED
 MAKEINFO
 MSGFMT
 MAKE
-LD
+LD_GOLD
+LD_BFD
 AS
 OBJCOPY
 OBJDUMP
@@ -4593,17 +4594,22 @@ if test $ac_verc_fail = yes; then
   AS=: critic_missing="$critic_missing as"
 fi

-for ac_prog in $LD
+LD_BFD=
+LD_GOLD=
+ld_is_gold="`$LD --version | sed -n 's/^GNU \(gold\).*$/\1/p'`"
+if test -z "$ld_is_gold"; then
+  LD_BFD=$LD
+  for ac_prog in $LD_BFD
 do
   # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
 $as_echo_n "checking for $ac_word... " >&6; }
-if ${ac_cv_prog_LD+:} false; then :
+if ${ac_cv_prog_LD_BFD+:} false; then :
   $as_echo_n "(cached) " >&6
 else
-  if test -n "$LD"; then
-  ac_cv_prog_LD="$LD" # Let the user override the test.
+  if test -n "$LD_BFD"; then
+  ac_cv_prog_LD_BFD="$LD_BFD" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH
@@ -4612,7 +4618,7 @@ do
   test -z "$as_dir" && as_dir=.
     for ac_exec_ext in '' $ac_executable_extensions; do
   if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
-    ac_cv_prog_LD="$ac_prog"
+    ac_cv_prog_LD_BFD="$ac_prog"
     $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
     break 2
   fi
@@ -4622,26 +4628,26 @@ IFS=$as_save_IFS

 fi
 fi
-LD=$ac_cv_prog_LD
-if test -n "$LD"; then
-  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD" >&5
-$as_echo "$LD" >&6; }
+LD_BFD=$ac_cv_prog_LD_BFD
+if test -n "$LD_BFD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD_BFD" >&5
+$as_echo "$LD_BFD" >&6; }
 else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi


-  test -n "$LD" && break
+  test -n "$LD_BFD" && break
 done

-if test -z "$LD"; then
+if test -z "$LD_BFD"; then
   ac_verc_fail=yes
 else
   # Found it, now check the version.
-  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD" >&5
-$as_echo_n "checking version of $LD... " >&6; }
-  ac_prog_version=`$LD --version 2>&1 | sed -n 's/^.*GNU ld.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD_BFD" >&5
+$as_echo_n "checking version of $LD_BFD... " >&6; }
+  ac_prog_version=`$LD_BFD --version 2>&1 | sed -n 's/^.*GNU ld.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
   case $ac_prog_version in
     '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
     2.1[0-9][0-9]*|2.[2-9][0-9]*|[3-9].*|[1-9][0-9]*)
@@ -4653,9 +4659,80 @@ $as_echo_n "checking version of $LD... " >&6; }
 $as_echo "$ac_prog_version" >&6; }
 fi
 if test $ac_verc_fail = yes; then
-  LD=: critic_missing="$critic_missing ld"
+  LD_BFD=:
 fi

+else
+# Accept gold 1.11 or higher.
+  LD_GOLD=$LD
+  for ac_prog in $LD_GOLD
+do
+  # Extract the first word of "$ac_prog", so it can be a program name with args.
+set dummy $ac_prog; ac_word=$2
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for $ac_word" >&5
+$as_echo_n "checking for $ac_word... " >&6; }
+if ${ac_cv_prog_LD_GOLD+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  if test -n "$LD_GOLD"; then
+  ac_cv_prog_LD_GOLD="$LD_GOLD" # Let the user override the test.
+else
+as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+for as_dir in $PATH
+do
+  IFS=$as_save_IFS
+  test -z "$as_dir" && as_dir=.
+    for ac_exec_ext in '' $ac_executable_extensions; do
+  if { test -f "$as_dir/$ac_word$ac_exec_ext" && $as_test_x "$as_dir/$ac_word$ac_exec_ext"; }; then
+    ac_cv_prog_LD_GOLD="$ac_prog"
+    $as_echo "$as_me:${as_lineno-$LINENO}: found $as_dir/$ac_word$ac_exec_ext" >&5
+    break 2
+  fi
+done
+  done
+IFS=$as_save_IFS
+
+fi
+fi
+LD_GOLD=$ac_cv_prog_LD_GOLD
+if test -n "$LD_GOLD"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $LD_GOLD" >&5
+$as_echo "$LD_GOLD" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+fi
+
+
+  test -n "$LD_GOLD" && break
+done
+
+if test -z "$LD_GOLD"; then
+  ac_verc_fail=yes
+else
+  # Found it, now check the version.
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking version of $LD_GOLD" >&5
+$as_echo_n "checking version of $LD_GOLD... " >&6; }
+  ac_prog_version=`$LD_GOLD --version 2>&1 | sed -n 's/^.*GNU gold.* \([0-9][0-9]*\.[0-9.]*\).*$/\1/p'`
+  case $ac_prog_version in
+    '') ac_prog_version="v. ?.??, bad"; ac_verc_fail=yes;;
+    1.1[1-9]*|1.[2-9][0-9]*|1.1[0-9][0-9]*|[2-9].*|[1-9][0-9]*)
+       ac_prog_version="$ac_prog_version, ok"; ac_verc_fail=no;;
+    *) ac_prog_version="$ac_prog_version, bad"; ac_verc_fail=yes;;
+
+  esac
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_prog_version" >&5
+$as_echo "$ac_prog_version" >&6; }
+fi
+if test $ac_verc_fail = yes; then
+  LD_GOLD=:
+fi
+
+fi
+# Neither ld nor gold are new enough.
+if test -z "$LD_BFD" && test -z "$LD_GOLD"; then
+  critic_missing="$critic_missing ld"
+fi
 
 # These programs are version sensitive.

@@ -6391,6 +6468,16 @@ $as_echo "$libc_cv_use_default_link" >&6; }
   use_default_link=$libc_cv_use_default_link
 fi

+# The gold linker has no builtin default linker script,
+# and the fallback of editing the builtin linker
+# script is not available. Therefore if use_default_link
+# is `no' then we can't use gold. This check is independent
+# of gold's version and is used to sanity check that the
+# linker continues to produce a useful shared link.
+if test "$ld_is_gold" && test "$use_default_link" = "no"; then
+  as_fn_error $? "$LD did not generate a useful shared link. Try using GNU ld.bfd?" "$LINENO" 5
+fi
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking linker output format" >&5
 $as_echo_n "checking linker output format... " >&6; }
 if ${libc_cv_output_format+:} false; then :
@@ -6409,6 +6496,17 @@ fi
 $as_echo "$libc_cv_output_format" >&6; }


+# The gold linker has no builtin default linker script,
+# and the fallback of parsing the builtin linker
+# script to determine the target is not available.
+# Therefore if libc_cv_output_format is `unknown' then
+# we can't use gold. This check is independent of gold's
+# version and is used to sanity check that the linker
+# continues to support --print-output-format.
+if test "$ld_is_gold" && test "$libc_cv_output_format" = "unknown"; then
+  as_fn_error $? "$LD did not support --print-output-format. Try using GNU ld.bfd?" "$LINENO" 5
+fi
+
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for -fno-toplevel-reorder -fno-section-anchors" >&5
 $as_echo_n "checking for -fno-toplevel-reorder -fno-section-anchors... " >&6; }
 if ${libc_cv_fno_toplevel_reorder+:} false; then :