https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82172
Jonathan Wakely <redi at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Last reconfirmed| |2017-09-21
Component|c++ |libstdc++
Assignee|unassigned at gcc dot gnu.org |redi at gcc dot gnu.org
Ever confirmed|0 |1
--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Another workaround is to disable the explicit instantiation declarations:
// Include a libstdc++ header, so config macros are defined:
#include <ciso646>
// Disable explicit insantiation declarations in later includes:
#undef _GLIBCXX_EXTERN_TEMPLATE
#include <sstream>
int main()
{
std::stringbuf myStringBuf{};
myStringBuf.sputc('a');
return 0;
}
This suggests the explicit instantiations in libstdc++.so are incompatible with
the C++17 declarations in the headers.
