From: Jonathan Wakely <jwakely@redhat.com>
Date: Tue, 14 May 2024 13:32:23 +0000 (+0100)
Subject: libstdc++: Guard dynamic_cast use in src/c++23/print.cc [PR115015]
X-Git-Tag: basepoints/gcc-16~9068
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=6cc8698244b522ad079675022c9de9e40de85878;p=thirdparty%2Fgcc.git

libstdc++: Guard dynamic_cast use in src/c++23/print.cc [PR115015]

Do not use dynamic_cast unconditionally, in case libstdc++ is built with
-fno-rtti.

libstdc++-v3/ChangeLog:

	PR libstdc++/115015
	* src/c++23/print.cc (__open_terminal(streambuf*)) [!__cpp_rtti]:
	Do not use dynamic_cast.
---

diff --git a/libstdc++-v3/src/c++23/print.cc b/libstdc++-v3/src/c++23/print.cc
index aceca6f9139..99a19cd4500 100644
--- a/libstdc++-v3/src/c++23/print.cc
+++ b/libstdc++-v3/src/c++23/print.cc
@@ -87,7 +87,7 @@ namespace
   void*
   __open_terminal(std::streambuf* sb)
   {
-#ifndef _GLIBCXX_USE_STDIO_PURE
+#if ! defined _GLIBCXX_USE_STDIO_PURE && defined __cpp_rtti
     using namespace __gnu_cxx;
 
     if (auto fb = dynamic_cast<stdio_sync_filebuf<char>*>(sb))