From acdb51541e4eb73177b28c79d395d8d6964ed161 Mon Sep 17 00:00:00 2001
From: Andrej Valek <andrej.valek@siemens.com>
Date: Fri, 17 Apr 2020 09:43:32 +0200
Subject: [PATCH] chromium: icu: use system library only targets

 - use bundled one for native/v8 internal builds

Complete system ICU library using requires ICU dev package
be installed on host. Enabling dependency on native package
is not enough due to V8 hosttools toolchain. V8 toolchain
is not using native sysroot, only a host packages.
On the other hand webenegine does not produce external
native artifacts. So external system ICU linking is not
needed.

Signed-off-by: Andrej Valek <andrej.valek@siemens.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
---
 chromium/third_party/icu/BUILD.gn | 18 ++++++++++++++----
 1 file changed, 14 insertions(+), 4 deletions(-)

diff --git a/chromium/third_party/icu/BUILD.gn b/chromium/third_party/icu/BUILD.gn
index 2430d3e48e5..5d00226667d 100644
--- a/chromium/third_party/icu/BUILD.gn
+++ b/chromium/third_party/icu/BUILD.gn
@@ -8,9 +8,13 @@ import("//build/config/linux/pkg_config.gni")
 import("//build/shim_headers.gni")
 import("//third_party/icu/config.gni")
 import("//third_party/icu/sources.gni")
+import("//v8/gni/snapshot_toolchain.gni")
 
 declare_args() {
   use_system_icu = false
+
+  # Use only target icu library, when system using is enabled
+  use_system_icu_target_only = false
 }
 
 if (is_android) {
@@ -24,6 +28,12 @@ if (is_mac && !icu_is_in_fuchsia) {
 assert(!icu_disable_thin_archive || !is_component_build,
        "icu_disable_thin_archive only works in static library builds")
 
+if (use_system_icu) {
+  # Use system library only for target, otherwise use bundled
+  if ((current_toolchain != host_toolchain) && (current_toolchain != v8_snapshot_toolchain)) {
+    use_system_icu_target_only = true
+  }
+}
 # Meta target that includes both icuuc and icui18n. Most targets want both.
 # You can depend on the individually if you need to.
 group("icu") {
@@ -413,7 +423,7 @@ config("system_icu_config") {
   }
 }
 
-if (use_system_icu) {
+if (use_system_icu_target_only) {
   pkg_config("system_icui18n") {
     packages = [ "icu-i18n" ]
   }
@@ -626,7 +636,7 @@ shim_headers("icuuc_shim") {
 }
 
 config("icu_config") {
-  if (use_system_icu) {
+  if (use_system_icu_target_only) {
     configs = [ ":system_icu_config"]
   } else {
     configs = [ ":bundled_icu_config"]
@@ -634,7 +644,7 @@ config("icu_config") {
 }
 
 group("icuuc") {
-  if (use_system_icu) {
+  if (use_system_icu_target_only) {
     deps = [ ":icuuc_shim" ]
     public_configs = [
       ":system_icu_config",
@@ -646,7 +656,7 @@ group("icuuc") {
 }
 
 group("icui18n") {
-  if (use_system_icu) {
+  if (use_system_icu_target_only) {
     deps = [ ":icui18n_shim" ]
     public_configs = [
       ":system_icu_config",
