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Declare some explicit instantiations for strings in Debug Mode

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The empty reps and the I/O functions do not need to be implicitly
instantiated to enable assertions, so declare the explicit
instantiations when _GLIBCXX_EXTERN_TEMPLATE == -1 (i.e. when
_GLIBCXX_ASSERTIONS is defined).

	PR libstdc++/86138
	* include/bits/basic_string.tcc: [_GLIBCXX_EXTERN_TEMPLATE < 0]
	Declare explicit instantiations of COW empty reps and I/O functions.

From-SVN: r262167
This commit is contained in:
Jonathan Wakely 2018-06-27 01:11:53 +01:00 • committed by Jonathan Wakely
parent 3beb455a05
commit db9e7b2a12
2 changed files with 10 additions and 4 deletions
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6
libstdc++-v3/ChangeLog
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@ -1,3 +1,9 @@
2018-06-27 Jonathan Wakely <jwakely@redhat.com>
PR libstdc++/86138
* include/bits/basic_string.tcc: [_GLIBCXX_EXTERN_TEMPLATE < 0]
Declare explicit instantiations of COW empty reps and I/O functions.
2018-06-26 David Edelsohn <dje.gcc@gmail.com>
* testsuite/experimental/algorithm/sample-2.cc: Add TLS DejaGNU

8
libstdc++-v3/include/bits/basic_string.tcc
View file

@ -1597,13 +1597,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
// Inhibit implicit instantiations for required instantiations,
// which are defined via explicit instantiations elsewhere.
#if _GLIBCXX_EXTERN_TEMPLATE > 0
#if _GLIBCXX_EXTERN_TEMPLATE
// The explicit instantiations definitions in src/c++11/string-inst.cc
// are compiled as C++14, so the new C++17 members aren't instantiated.
// Until those definitions are compiled as C++17 suppress the declaration,
// so C++17 code will implicitly instantiate std::string and std::wstring
// as needed.
# if __cplusplus <= 201402L
# if __cplusplus <= 201402L && _GLIBCXX_EXTERN_TEMPLATE > 0
extern template class basic_string<char>;
# elif ! _GLIBCXX_USE_CXX11_ABI
// Still need to prevent implicit instantiation of the COW empty rep,
@ -1626,7 +1626,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
getline(basic_istream<char>&, string&);
#ifdef _GLIBCXX_USE_WCHAR_T
# if __cplusplus <= 201402L
# if __cplusplus <= 201402L && _GLIBCXX_EXTERN_TEMPLATE > 0
extern template class basic_string<wchar_t>;
# elif ! _GLIBCXX_USE_CXX11_ABI
extern template basic_string<wchar_t>::size_type
@ -1646,7 +1646,7 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
basic_istream<wchar_t>&
getline(basic_istream<wchar_t>&, wstring&);
#endif // _GLIBCXX_USE_WCHAR_T
#endif // _GLIBCXX_EXTERN_TEMPLATE > 0
#endif // _GLIBCXX_EXTERN_TEMPLATE
_GLIBCXX_END_NAMESPACE_VERSION
} // namespace std