--- a/build/config/compiler/BUILD.gn.orig
+++ b/build/config/compiler/BUILD.gn
@@ -55,6 +55,10 @@
 }
 
 declare_args() {
+  is_musl = false
+}
+
+declare_args() {
   # Normally, Android builds are lightly optimized, even for debug builds, to
   # keep binary size down. Setting this flag to true disables such optimization
   android_full_debug = false
@@ -917,8 +917,13 @@
     } else if (current_cpu == "arm64") {
       if (is_clang && !is_android && !is_nacl && !is_fuchsia &&
           !(is_chromeos_lacros && is_chromeos_device)) {
-        cflags += [ "--target=aarch64-linux-gnu" ]
-        ldflags += [ "--target=aarch64-linux-gnu" ]
+        if (is_musl) {
+          cflags += [ "--target=aarch64-linux-musl" ]
+          ldflags += [ "--target=aarch64-linux-musl" ]
+        } else {
+          cflags += [ "--target=aarch64-linux-gnu" ]
+          ldflags += [ "--target=aarch64-linux-gnu" ]
+        }
       }
       if (is_android) {
         # Outline atomics crash on Exynos 9810. http://crbug.com/1272795
--- a/build/toolchain/linux/unbundle/BUILD.gn.orig
+++ b/build/toolchain/linux/unbundle/BUILD.gn
@@ -39,3 +39,22 @@
     current_os = host_os
   }
 }
+
+gcc_toolchain("v8_snapshot_cross") {
+  cc = getenv("BUILD_CC")
+  cxx = getenv("BUILD_CXX")
+  ar = getenv("BUILD_AR")
+  nm = getenv("BUILD_NM")
+  ld = cxx
+
+  extra_cflags = getenv("BUILD_CFLAGS")
+  extra_cppflags = getenv("BUILD_CPPFLAGS")
+  extra_cxxflags = getenv("BUILD_CXXFLAGS")
+  extra_ldflags = getenv("BUILD_LDFLAGS")
+
+  toolchain_args = {
+    current_cpu = host_cpu
+    current_os = host_os
+    v8_current_cpu = target_cpu
+  }
+}
--- a/build/config/linux/pkg_config.gni.orig
+++ b/build/config/linux/pkg_config.gni
@@ -91,7 +91,7 @@
   assert(defined(invoker.packages),
          "Variable |packages| must be defined to be a list in pkg_config.")
   config(target_name) {
-    if (host_toolchain == current_toolchain) {
+    if (current_cpu != target_cpu) {
       args = common_pkg_config_args + host_pkg_config_args + invoker.packages
     } else {
       args = common_pkg_config_args + pkg_config_args + invoker.packages