From 40c5bb4aa3fa4bc9a489fa15c3bb0ce828e683bc 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 78e270c731..7e48795223 100644
--- a/src/buildtools/third_party/libc++/BUILD.gn
+++ b/src/buildtools/third_party/libc++/BUILD.gn
@@ -543,12 +543,8 @@ target(libcxx_target_type, "libc++") {
   # so that modules can be used for other chromium targets which don't enable
   # exception and rtti.
   configs -= configs_to_remove + [
-               "//build/config/compiler:no_exceptions",
-               "//build/config/compiler:no_rtti",
              ]
   configs += configs_to_add + [
-               "//build/config/compiler:exceptions",
-               "//build/config/compiler:rtti",
              ]
 
   deps = [ "//third_party/llvm-libc:llvm-libc-shared" ]
diff --git a/src/buildtools/third_party/libc++abi/BUILD.gn b/src/buildtools/third_party/libc++abi/BUILD.gn
index c39830cf15..f79f507228 100644
--- a/src/buildtools/third_party/libc++abi/BUILD.gn
+++ b/src/buildtools/third_party/libc++abi/BUILD.gn
@@ -100,4 +100,34 @@ target(libcxxabi_target_type, "libc++abi") {
   if (use_libcxx_modules) {
     configs -= [ "//build/config/compiler:libcxx_module" ]
   }
+  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",
+    ]
+  }
 }