From 25a0b06db68e5f506f98decc7ab0a4c18b10d55a Mon Sep 17 00:00:00 2001
From: klzgrad <kizdiv@gmail.com>
Date: Sat, 30 Nov 2019 21:52:42 +0800
Subject: [PATCH] libc++: Disable exceptions and RTTI

Except on Mac, where exceptions are required.
And except on Android, where rtti is required.
---
 src/buildtools/third_party/libc++/BUILD.gn    |  4 ---
 src/buildtools/third_party/libc++abi/BUILD.gn | 30 +++++++++++++++++++
 2 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/src/buildtools/third_party/libc++/BUILD.gn b/src/buildtools/third_party/libc++/BUILD.gn
index 30fad21ed7..b29b678d6a 100644
--- a/src/buildtools/third_party/libc++/BUILD.gn
+++ b/src/buildtools/third_party/libc++/BUILD.gn
@@ -164,8 +164,6 @@ target(_libcxx_target_type, "libc++") {
   }
   configs -= [
     "//build/config/compiler:chromium_code",
-    "//build/config/compiler:no_exceptions",
-    "//build/config/compiler:no_rtti",
     "//build/config/coverage:default_coverage",
   ]
   if ((is_android || is_apple) && libcxx_is_shared) {
@@ -179,8 +177,6 @@ target(_libcxx_target_type, "libc++") {
   configs += [
     ":config",
     "//build/config/compiler:no_chromium_code",
-    "//build/config/compiler:exceptions",
-    "//build/config/compiler:rtti",
   ]
 
   if (libcxx_is_shared && !is_win) {
diff --git a/src/buildtools/third_party/libc++abi/BUILD.gn b/src/buildtools/third_party/libc++abi/BUILD.gn
index bf3db7adc3..0321740443 100644
--- a/src/buildtools/third_party/libc++abi/BUILD.gn
+++ b/src/buildtools/third_party/libc++abi/BUILD.gn
@@ -98,4 +98,34 @@ source_set("libc++abi") {
 
   # libc++abi depends on libc++ internals.
   include_dirs = [ "//third_party/libc++/src/src" ]
+  if (!is_apple) {
+    sources -= [
+      "//third_party/libc++abi/src/src/cxa_exception.cpp",
+      "//third_party/libc++abi/src/src/cxa_personality.cpp",
+      "//third_party/libc++abi/src/src/private_typeinfo.cpp",
+    ]
+    sources += [
+      "//third_party/libc++abi/src/src/cxa_noexception.cpp",
+    ]
+    defines += [ "_LIBCXXABI_NO_EXCEPTIONS" ]
+    configs -= [
+      "//build/config/compiler:exceptions",
+      "//build/config/compiler:rtti",
+    ]
+    configs += [
+      "//build/config/compiler:no_exceptions",
+      "//build/config/compiler:no_rtti",
+    ]
+  }
+  if (is_android) {
+    sources += [
+      "//third_party/libc++abi/src/src/private_typeinfo.cpp",
+    ]
+    configs -= [
+      "//build/config/compiler:no_rtti",
+    ]
+    configs += [
+      "//build/config/compiler:rtti",
+    ]
+  }
 }