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[libc++] Fix extern template visibility for Windows

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On Windows, marking an `extern template class` declaration as exported
actually forces an instantiation, which is not the desired behavior.
Instead, the actual explicit instantiations need to be exported.

Differential Revision: https://reviews.llvm.org/D24679

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@281925 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Shoaib Meenai
2016-09-19 18:29:07 +00:00
parent 7d7f3cc9b1
commit e5cbce437b
5 changed files with 85 additions and 56 deletions
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18
src/ios.cpp
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@@ -25,19 +25,19 @@
_LIBCPP_BEGIN_NAMESPACE_STD
template class basic_ios<char>;
template class basic_ios<wchar_t>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ios<char>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ios<wchar_t>;
template class basic_streambuf<char>;
template class basic_streambuf<wchar_t>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_streambuf<char>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_streambuf<wchar_t>;
template class basic_istream<char>;
template class basic_istream<wchar_t>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_istream<char>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_istream<wchar_t>;
template class basic_ostream<char>;
template class basic_ostream<wchar_t>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ostream<char>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_ostream<wchar_t>;
template class basic_iostream<char>;
template class _LIBCPP_CLASS_TEMPLATE_INSTANTIATION_VIS basic_iostream<char>;
class _LIBCPP_HIDDEN __iostream_category
: public __do_message