Your message dated Sun, 4 Sep 2016 13:46:35 +0200 with message-id <[email protected]> and subject line Fixed in 6.2.0-2 has caused the Debian Bug report #834492, regarding clang-3.9: "non-virtual thunk" abi_tag mangling is different from g++ to be marked as done.
This means that you claim that the problem has been dealt with. If this is not the case it is now your responsibility to reopen the Bug report if necessary, and/or fix the problem forthwith. (NB: If you are a system administrator and have no idea what this message is talking about, this may indicate a serious mail system misconfiguration somewhere. Please contact [email protected] immediately.) -- 834492: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=834492 Debian Bug Tracking System Contact [email protected] with problems
--- Begin Message ---Package: clang-3.9 Version: 1:3.9~+rc1-1~exp1 Severity: important Dear Maintainer, The new mangling behavior of clang++ for GCC abi_tag attribute seems to be different from the g++ one on some edge cases. Consider the following code: $ cat classes.hpp #include <string> struct Mother { virtual ~Mother() {}; int bar; }; struct Father { virtual std::string get_foo() = 0; }; class Derived: public Mother, public Father { public: std::string get_foo(); }; $ cat classes.cpp #include "classes.hpp" std::string Derived::get_foo() { return ""; } $ cat main.cpp #include "classes.hpp" struct Final: public Derived { }; int main() { Final().get_foo(); } When compiling the classes with clang++ and trying to link the executable with g++ one gets the following link error: $ clang++-3.9 -c classes.cpp && g++-5 main.cpp classes.o /tmp/cchpctTt.o:main.cpp:vtable for Final : erreur : référence à « non- virtual thunk to Derived::get_foo() » non définie collect2: error: ld returned 1 exit status And it seems this symbol is mangled differently by clang++ and g++: $ clang++-3.9 -c classes.cpp && nm -C classes.o | grep get_foo 0000000000000000 T Derived::get_foo[abi:cxx11]() 0000000000000070 T non-virtual thunk to Derived::get_foo[abi:cxx11]() $ g++-5 -c classes.cpp && nm -C classes.o | grep get_foo 0000000000000000 T Derived::get_foo[abi:cxx11]() 0000000000000065 T non-virtual thunk to Derived::get_foo() -- System Information: Debian Release: stretch/sid APT prefers testing APT policy: (990, 'testing'), (800, 'stable-updates'), (800, 'stable'), (700, 'unstable'), (90, 'experimental') Architecture: amd64 (x86_64) Kernel: Linux 4.6.0-1-amd64 (SMP w/8 CPU cores) Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Init: systemd (via /run/systemd/system) Versions of packages clang-3.9 depends on: ii binutils 2.26.1-1 ii libc6 2.23-4 ii libc6-dev 2.23-4 ii libclang-common-3.9-dev 1:3.9~+rc1-1~exp1 ii libclang1-3.9 1:3.9~+rc1-1~exp1 ii libgcc-6-dev 6.1.1-10 ii libgcc1 1:6.1.1-10 ii libllvm3.9 1:3.9~+rc1-1~exp1 ii libobjc-6-dev 6.1.1-10 ii libstdc++-6-dev 6.1.1-10 ii libstdc++6 6.1.1-10 Versions of packages clang-3.9 recommends: ii llvm-3.9-dev 1:3.9~+rc1-1~exp1 ii python 2.7.11-2 Versions of packages clang-3.9 suggests: pn clang-3.9-doc <none> pn gnustep <none> pn gnustep-devel <none> -- no debconf information
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--- Begin Message ---Version: 6.2.0-2
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