1 files changed, 94 insertions, 0 deletions
diff --git a/build/unix/build-binutils/build-binutils.sh b/build/unix/build-binutils/build-binutils.sh
new file mode 100755
index 0000000000..cab5f3f150
--- /dev/null
+++ b/build/unix/build-binutils/build-binutils.sh
@@ -0,0 +1,94 @@
+#!/bin/bash
+
+make_flags="-j$(nproc)"
+
+root_dir="$1"
+
+cd $root_dir/binutils-source
+
+patch -p1 <<'EOF'
+From 4476cc67e657d6b26cd453c555a611f1ab956660 Mon Sep 17 00:00:00 2001
+From: "H.J. Lu" <hjl.tools@gmail.com>
+Date: Thu, 30 Aug 2018 09:21:57 -0700
+Subject: [PATCH] ld: Lookup section in output with the same name
+
+When there are more than one input sections with the same section name,
+SECNAME, linker picks the first one to define __start_SECNAME and
+__stop_SECNAME symbols.  When the first input section is removed by
+comdat group, we need to check if there is still an output section
+with section name SECNAME.
+
+	PR ld/23591
+	* ldlang.c (undef_start_stop): Lookup section in output with
+	the same name.
+---
+ ld/ldlang.c | 18 ++++++++++++++++++
+ 1 file changed, 18 insertions(+)
+
+diff --git a/ld/ldlang.c b/ld/ldlang.c
+index 8878ccd..d644b56 100644
+--- a/ld/ldlang.c
++++ b/ld/ldlang.c
+@@ -6097,6 +6097,24 @@ undef_start_stop (struct bfd_link_hash_entry *h)
+       || strcmp (h->u.def.section->name,
+ 		 h->u.def.section->output_section->name) != 0)
+     {
++      asection *sec = bfd_get_section_by_name (link_info.output_bfd,
++					       h->u.def.section->name);
++      if (sec != NULL)
++	{
++	  /* When there are more than one input sections with the same
++	     section name, SECNAME, linker picks the first one to define
++	     __start_SECNAME and __stop_SECNAME symbols.  When the first
++	     input section is removed by comdat group, we need to check
++	     if there is still an output section with section name
++	     SECNAME.  */
++	  asection *i;
++	  for (i = sec->map_head.s; i != NULL; i = i->map_head.s)
++	    if (strcmp (h->u.def.section->name, i->name) == 0)
++	      {
++		h->u.def.section = i;
++		return;
++	      }
++	}
+       h->type = bfd_link_hash_undefined;
+       h->u.undef.abfd = NULL;
+     }
+-- 
+2.17.1
+EOF
+
+cd ..
+
+TARGETS="aarch64-linux-gnu"
+
+# Build target-specific GNU as ; build them first so that the few documentation
+# files they install are overwritten by the full binutils build.
+
+for target in $TARGETS; do
+
+  mkdir binutils-$target
+  cd binutils-$target
+
+  ../binutils-source/configure --prefix /tools/binutils/ --disable-gold --disable-ld --disable-binutils --disable-gprof --disable-nls --target=$target || exit 1
+  make $make_flags || exit 1
+  make install $make_flags DESTDIR=$root_dir || exit 1
+
+  cd ..
+done
+
+# Build binutils
+mkdir binutils-objdir
+cd binutils-objdir
+
+# --enable-targets builds extra target support in ld.
+# Enabling aarch64 support brings in arm support, so we don't need to specify that too.
+../binutils-source/configure --prefix /tools/binutils/ --enable-gold --enable-plugins --disable-nls --enable-targets="$TARGETS" || exit 1
+make $make_flags || exit 1
+make install $make_flags DESTDIR=$root_dir || exit 1
+
+cd ..
+
+# Make a package of the built binutils
+cd $root_dir/tools
+tar caf $root_dir/binutils.tar.xz binutils/