From 7d6612d0e53fdff882fa7bf61e0892287bcd78d3 Mon Sep 17 00:00:00 2001
From: YAMAMOTO Takashi <yamamoto@midokura.com>
Date: Thu, 4 Jan 2024 17:05:51 +0900
Subject: [PATCH] libcxxabi.cmake: fix build error

This tries to mirror the following change.
```
commit c260fee5163cdd3d7eb01576f606e83dcf6f7808
Author: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
Date:   Tue Aug 31 14:47:13 2021 -0300

    libs/libxx: Enforce RTTI for building libcxxabi

    It is okay for the application to be built without RTTI (-fno-rrti), but
    libcxxabi requires RTTI at least for the library.

    Signed-off-by: Gustavo Henrique Nihei <gustavo.nihei@espressif.com>
```
---
 libs/libxx/libcxxabi.cmake | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/libxx/libcxxabi.cmake b/libs/libxx/libcxxabi.cmake
index fb4589d020..63bd3f7b00 100644
--- a/libs/libxx/libcxxabi.cmake
+++ b/libs/libxx/libcxxabi.cmake
@@ -99,4 +99,7 @@ foreach(src ${SRCS})
   list(APPEND TARGET_SRCS ${src})
 endforeach()
 
+# RTTI is required for building the libcxxabi library
+target_compile_options(libcxxabi PRIVATE -frtti)
+
 target_sources(libcxxabi PRIVATE ${TARGET_SRCS})