Tested x86_64-linux. Pushed to trunk.
-- >8 --
When building src/c++20/tzdb.cc we currently get a build error for
--with-default-libstdcxx-abi=gcc4-compatible because std::chrono::tzdb
and related types are not declared for the gcc4-compatible ABI (unless
--disable-libstdcxx-dual-abi is also used, so that the gcc4-compatible
ABI is the only one built).
Define _GLIBCXX_USE_CXX11_ABI in tzdb.cc so that for a dual-abi build we
always build it for the cxx11 ABI.
libstdc++-v3/ChangeLog:
* src/c++20/tzdb.cc (_GLIBCXX_USE_CXX11_ABI): Define to 1.
---
libstdc++-v3/src/c++20/tzdb.cc | 3 +++
1 file changed, 3 insertions(+)
diff --git a/libstdc++-v3/src/c++20/tzdb.cc b/libstdc++-v3/src/c++20/tzdb.cc
index 2ce53d38768..20399b91e47 100644
--- a/libstdc++-v3/src/c++20/tzdb.cc
+++ b/libstdc++-v3/src/c++20/tzdb.cc
@@ -25,6 +25,9 @@
// The -Wabi warnings in this file are all for non-exported symbols.
#pragma GCC diagnostic ignored "-Wabi"
+// In the usual dual-abi build, std::chrono::tzdb is only defined for cxx11.
+#define _GLIBCXX_USE_CXX11_ABI 1
+
#include <chrono>
#include <fstream> // ifstream
#include <sstream> // istringstream
--
2.39.0
