Sergio,
You answered my question - the same Qt build may be used with different
versions of gcc because (as you say) "since Qt doesn't use std:: in it's
ABI."
Thanks,
Alex
22.06.2017 14:36, Sérgio Martins пишет:
On Thu, Jun 22, 2017 at 11:58 AM, Oleksiy Balabay
<oleksiy.bala...@gmail.com> wrote:
Gcc ABI was significantly changed between 4.x and 5.x. If you try to link
application with third-party library that was compiled with an older version
of GCC then you get linker errors about undefined references to symbols that
involve types in the std::__cxx11 namespace. The problem is related to
https://gcc.gnu.org/onlinedocs/libstdc++/manual/using_dual_abi.html
But the same Qt pre-build binary distribution from the official site for
Linux links correctly with gcc 5.x and gcc 4.x.
How to get the same result with other 3rd-party libraries? How the problem
of different gcc ABI is resolved? Is _GLIBCXX_USE_CXX11_ABI=0 defined for Qt
pre-build version that is available to download?
I don't think Qt uses _GLIBCXX_USE_CXX11_ABI=0. It shouldn't even
care, since Qt doesn't use std:: in it's ABI.
Can you show us the linker errors that are related to Qt ?
Regards,
Sergio Martins
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