If this is not the right place to export the symbol (or you do not want to export it in the general case), I can always add a platform-specific file for it. So far, tested on x86_64-darwin21, wider testing will follow over the holidays.
OK for trunk? Iain --- 8< --- 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 <i...@sandoe.co.uk> libstdc++-v3/ChangeLog: * config/abi/pre/gnu.ver (GLIBCXX_3.4): Add __gnu_cxx::zoneinfo_dir_override(). --- 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..bd4ab450652 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: -- 2.37.1 (Apple Git-137.1)