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5 changes: 3 additions & 2 deletions include/fmt/chrono.h
Original file line number Diff line number Diff line change
Expand Up @@ -398,8 +398,9 @@ auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc)
if (detail::is_utf8() && loc != get_classic_locale()) {
// char16_t and char32_t codecvts are broken in MSVC (linkage errors) and
// gcc-4.
#if FMT_MSC_VERSION != 0 || \
(defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI))
#if FMT_MSC_VERSION != 0 || \
(defined(__GLIBCXX__) && \
(!defined(_GLIBCXX_USE_DUAL_ABI) || _GLIBCXX_USE_DUAL_ABI == 0))
// The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5
// and newer.
using code_unit = wchar_t;
Expand Down