From 1feb1c2bdb48e952d6ac88e7d5513ec662a35032 Mon Sep 17 00:00:00 2001
From: Boris Zbarsky <bzbarsky@apple.com>
Date: Thu, 21 Sep 2023 10:17:59 -0400
Subject: [PATCH] Add a compile flag to allow setting -fexceptions.

Fixes https://github.com/project-chip/connectedhomeip/issues/29368
---
 build/config/compiler/BUILD.gn | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
index 31f396a4574c3a..c508d657b17ab2 100644
--- a/build/config/compiler/BUILD.gn
+++ b/build/config/compiler/BUILD.gn
@@ -485,8 +485,12 @@ config("coverage_default") {
 }
 
 declare_args() {
-  # Enable Runtime Type Information (RTTI)
+  # Enable or disable Runtime Type Information (RTTI).
+  # Defaults true on darwin because Darwin.framework uses it.
   enable_rtti = current_os == "mac" || current_os == "ios"
+
+  # Enable or disable support for C++ exceptions.
+  enable_exceptions = false
 }
 
 config("no_rtti") {
@@ -514,7 +518,11 @@ config("exceptions") {
 }
 
 config("exceptions_default") {
-  configs = [ ":no_exceptions" ]
+  if (enable_exceptions) {
+    configs = [ ":exceptions" ]
+  } else {
+    configs = [ ":no_exceptions" ]
+  }
 }
 
 config("unwind_tables") {