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On Fri, Oct 2, 2015 at 10:13 PM, Mike Frysinger <vapier@g.o> wrote: |
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> Title: GCC 5 Defaults to the New C++11 ABI |
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> Author: Mike Frysinger <vapier@g.o> |
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> Content-Type: text/plain |
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> Posted: 2015-10-02 |
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> Revision: 1 |
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> News-Item-Format: 1.0 |
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> Display-If-Installed: >=sys-devel/gcc-5 |
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> |
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> GCC 5 uses the new C++ ABI by default. When building new code, you might run |
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> into link time errors like: |
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> ...: undefined reference to '_ZNSt6chrono12steady_clock3nowEv@GLIBCXX_3.4.17' |
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> Or you might see linkage failures with "std::__cxx11::string" in the output. |
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> |
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> These are signs that you need to rebuild packages using the new C++ ABI. |
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> You can quickly do so by using revdep-rebuild like so: |
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> # revdep-rebuild --library 'libstdc\+\+\.so\.6' |
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> |
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> For more details, feel free to peruse: |
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> https://developerblog.redhat.com/2015/02/05/gcc5-and-the-c11-abi/ |
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> https://blogs.gentoo.org/blueness/2015/03/10/the-c11-abi-incompatibility-problem-in-gentoo/ |
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Just a heads-up: the python-based revdep-rebuild which is included |
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with gentoolkit-0.3.1 requires slightly different syntax: |
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|
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# revdep-rebuild --library 'libstdc++.so.6' |
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|
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I pushed a revision to the news item with updated instructions. |
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