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| author |   Mike Frysinger <vapier@gentoo.org> | 2015-10-22 09:56:54 -0400 |
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| committer | Mike Frysinger <vapier@gentoo.org> | 2015-10-22 12:04:55 -0400 |
| commit | 9e7f85087d04f931cba57ba019a8842a8af9470b (patch) | |
| tree | 62ff5605c1c9dc4778104f6934bbc41ea71acc8b | |
| parent | Revision 2 of news for 'Future Support of hardened-sources kernel' (diff) | |
| download | gentoo-news-9e7f85087d04f931cba57ba019a8842a8af9470b.tar.gz gentoo-news-9e7f85087d04f931cba57ba019a8842a8af9470b.tar.bz2 gentoo-news-9e7f85087d04f931cba57ba019a8842a8af9470b.zip | |
gcc-5: news item about C++ ABI breakage
| -rw-r--r-- | 2015-10-22-gcc-5-new-c++11-abi/2015-10-22-gcc-5-new-c++11-abi.en.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/2015-10-22-gcc-5-new-c++11-abi/2015-10-22-gcc-5-new-c++11-abi.en.txt b/2015-10-22-gcc-5-new-c++11-abi/2015-10-22-gcc-5-new-c++11-abi.en.txt new file mode 100644 index 0000000..5f6ffbb --- /dev/null +++ b/2015-10-22-gcc-5-new-c++11-abi/2015-10-22-gcc-5-new-c++11-abi.en.txt @@ -0,0 +1,21 @@ +Title: GCC 5 Defaults to the New C++11 ABI +Author: Mike Frysinger <vapier@gentoo.org> +Content-Type: text/plain +Posted: 2015-10-22 +Revision: 1 +News-Item-Format: 1.0 +Display-If-Installed: >=sys-devel/gcc-5 + +GCC 5 uses the new C++ ABI by default. When building new code, you might run +into link time errors that include lines similar to: +...: undefined reference to '_ZNSt6chrono12steady_clock3nowEv@GLIBCXX_3.4.17' + +Or you might see linkage failures with "std::__cxx11::string" in the output. + +These are signs that you need to rebuild packages using the new C++ ABI. +You can quickly do so by using revdep-rebuild (from gentoolkit) like so: +# revdep-rebuild --library 'libstdc\+\+\.so\.6' -- --exclude gcc + +For more details, feel free to peruse: +https://developerblog.redhat.com/2015/02/05/gcc5-and-the-c11-abi/ +https://blogs.gentoo.org/blueness/2015/03/10/the-c11-abi-incompatibility-problem-in-gentoo/ |