[gcc r13-4997] libstdc++: Export the __gnu_cxx::zoneinfo_dir_override symbol [PR108228].

[Iain D Sandoe]

https://gcc.gnu.org/g:96cba8ebe512887025a9e8b74833074d8aa844c8

commit r13-4997-g96cba8ebe512887025a9e8b74833074d8aa844c8
Author: Iain Sandoe <iain@sandoe.co.uk>
Date:   Sat Dec 24 10:55:09 2022 +0000

    libstdc++: Export the __gnu_cxx::zoneinfo_dir_override symbol [PR108228].
    
    This symbol needs to be visible in the library interface for Darwin
    to override it with a user-provided one.
    
    Signed-off-by: Iain Sandoe <iain@sandoe.co.uk>
    
            PR libstdc++/108228
    
    libstdc++-v3/ChangeLog:
    
            * config/abi/pre/gnu.ver (GLIBCXX_3.4):
            Add __gnu_cxx::zoneinfo_dir_override().

Diff:
---
 libstdc++-v3/config/abi/pre/gnu.ver | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libstdc++-v3/config/abi/pre/gnu.ver b/libstdc++-v3/config/abi/pre/gnu.ver
index 570ffca8710..dc46f670b78 100644
--- a/libstdc++-v3/config/abi/pre/gnu.ver
+++ b/libstdc++-v3/config/abi/pre/gnu.ver
@@ -1104,6 +1104,9 @@ GLIBCXX_3.4 {
     # std::uncaught_exception()
     _ZSt18uncaught_exceptionv;
 
+    # __gnu_cxx::zoneinfo_dir_override()
+    _ZN9__gnu_cxx21zoneinfo_dir_overrideEv;
+
   # DO NOT DELETE THIS LINE.  Port-specific symbols, if any, will be here.
 
   local: