https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84044
Arnaud Giersch <arnaud.giersch at free dot fr> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |arnaud.giersch at free dot fr
--- Comment #9 from Arnaud Giersch <arnaud.giersch at free dot fr> ---
Hi,
A similar warning appeared recently with a gcc9 snapshot with a slightly
modified code. The main difference seems to be the enum declaration. By
"recently", I mean late october or early november (2018).
a.cpp
=====
struct B {
enum class E { V0, V1 };
virtual ~B();
E e;
};
B b;
int main() {}
b.cpp
=====
struct B {
enum class E { V0, V1 };
virtual ~B();
E e;
};
B::~B() = default;
=====
$ g++ -O2 -flto a.cpp b.cpp
a.cpp:2:14: warning: type 'E' violates the C++ One Definition Rule [-Wodr]
2 | enum class E { V0, V1 };
| ^
a.cpp:2:14: note: an enum with different values is defined in another
translation unit
a.cpp:4:11: warning: '__dt_del ' violates the C++ One Definition Rule [-Wodr]
4 | virtual ~B();
| ^
b.cpp:1:8: note: '__dt_del ' was previously declared here
1 | struct B {
| ^
a.cpp:4:11: warning: '__dt_comp ' violates the C++ One Definition Rule [-Wodr]
4 | virtual ~B();
| ^
b.cpp:1:8: note: '__dt_comp ' was previously declared here
1 | struct B {
| ^
$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc-snapshot/libexec/gcc/x86_64-linux-gnu/9/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Debian 20181110-2'
--with-bugurl=file:///usr/share/doc/gcc-snapshot/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++
--prefix=/usr/lib/gcc-snapshot --with-gcc-major-version-only --program-prefix=
--enable-shared --enable-linker-build-id --disable-nls --with-sysroot=/
--enable-clocale=gnu --enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-plugin --with-system-zlib
--with-target-system-zlib --enable-objc-gc=auto --enable-multiarch
--disable-werror --with-arch-32=i686 --with-abi=m64
--with-multilib-list=m32,m64,mx32 --enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none --enable-checking=yes
--build=x86_64-linux-gnu --host=x86_64-linux-gnu --target=x86_64-linux-gnu
Thread model: posix
gcc version 9.0.0 20181110 (experimental) [trunk revision 266003] (Debian
20181110-2)
Regards,
Arnaud Giersch
