Use gold as default linker for host toolchain

.orchestra/config/components/toolchain/arch/host.lib.yml

@@ -39,6 +39,8 @@ extra_gcc_configure_options:
   - CFLAGS_FOR_TARGET="-I/usr/include/tirpc (@= options["use_old_glibc_cflags"] @)"
   - CXXFLAGS_FOR_TARGET="-I/usr/include/tirpc (@= options["use_old_glibc_cflags"] @)"
   - LDFLAGS_FOR_TARGET="(@= options["use_old_glibc_lflags"] @) -Wl,-z,origin -Wl,--enable-new-dtags -Wl,-rpath,$RPATH_PLACEHOLDER/lib"
+extra_binutils_configure_options:
+  - --enable-gold=default
 extra_gcc_make_variables: LIBRARY_PATH=/usr/lib/x86_64-linux-gnu
 #@ end
 

.orchestra/config/components/toolchain/lib/binutils.lib.yml

 #@ load("/lib/fn_args.lib.yml", "mandatory")
 #@ load("/lib/create_component.lib.yml", "single_build_component")
+#@ load("/lib/shell.lib.yml", "expand_args")
 #@ load("/components/toolchain/lib/common.lib.yml", "linker_flags")
 
 #@yaml/text-templated-strings
 ---
-#@ def _binutils_args(triple=mandatory, binutils_version=mandatory):
+#@ def _binutils_args(triple=mandatory, binutils_version=mandatory, extra_binutils_configure_options=""):
 
 #@   source_url = "https://ftp.gnu.org/gnu/binutils/binutils-" + binutils_version + ".tar.bz2"
 configure: |
@@ -39,6 +40,7 @@ configure: |
     --disable-readline \
     --disable-sim \
     --without-stage1-ldflags \
+    (@= expand_args(extra_binutils_configure_options) @) \
     CFLAGS="-w -ggdb3 -O3" \
     CXXFLAGS="-w -ggdb3 -O3" \
     LDFLAGS="(@= linker_flags @)"

.orchestra/config/components/toolchain/lib/toolchain.lib.yml

@@ -29,13 +29,14 @@
 #@    gcc_sysroot=None,
 #@    mingw64_version=None,
 #@    extra_gcc_configure_options=None,
+#@    extra_binutils_configure_options=None,
 #@    extra_gcc_make_variables="",
 #@    dynamic=None,
 #@    spec=False,
 #@ ):
 
 #@ if/end binutils_version:
-(@= "toolchain/" + toolchain_name + "/binutils" @): #@ create_binutils_component(triple=triple, binutils_version=binutils_version)
+(@= "toolchain/" + toolchain_name + "/binutils" @): #@ create_binutils_component(triple=triple, binutils_version=binutils_version, extra_binutils_configure_options=extra_binutils_configure_options)
 
 #@ if/end gdb_version:
 (@= "toolchain/" + toolchain_name + "/gdb" @): #@ create_gdb_component(triple=triple, gdb_version=gdb_version)