https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104325
Bug ID: 104325
Summary: undefined reference to `virtual thunk to ...'
Product: gcc
Version: 11.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: nospam at woho dot de
Target Milestone: ---
Created attachment 52324
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=52324&action=edit
minimal testcase
gcc doesn't generate virtual thunk to MPropertyLocalImpl<Model::Enum>::obs()
member of the attached minimal testcase when building with -O2 and -fno-inline:
woho@atrala-wohoo:~$ gcc -fPIC -O2 -fno-inline property.cpp
/usr/bin/ld: /tmp/ccNxYRJL.o: in function `MPropertyLocal<Model::Enum>::obs()
[clone .isra.0]':
property.cpp:(.text+0x11): undefined reference to `virtual thunk to
MPropertyLocalImpl<Model::Enum>::obs()'
/usr/bin/ld: property.cpp:(.text+0x18): undefined reference to `virtual thunk
to MPropertyLocalImpl<Model::Enum>::obs()'
collect2: error: ld returned 1 exit status
Environment:
woho@atrala-wohoo:~$ gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/11/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none:amdgcn-amdhsa
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
11.2.0-13ubuntu1' --with-bugurl=file:///usr/share/doc/gcc-11/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++,m2 --prefix=/usr
--with-gcc-major-version-only --program-suffix=-11
--program-prefix=x86_64-linux-gnu- --enable-shared --enable-linker-build-id
--libexecdir=/usr/lib --without-included-gettext --enable-threads=posix
--libdir=/usr/lib --enable-nls --enable-bootstrap --enable-clocale=gnu
--enable-libstdcxx-debug --enable-libstdcxx-time=yes
--with-default-libstdcxx-abi=new --enable-gnu-unique-object
--disable-vtable-verify --enable-plugin --enable-default-pie --with-system-zlib
--enable-libphobos-checking=release --with-target-system-zlib=auto
--enable-objc-gc=auto --enable-multiarch --disable-werror --enable-cet
--with-arch-32=i686 --with-abi=m64 --with-multilib-list=m32,m64,mx32
--enable-multilib --with-tune=generic
--enable-offload-targets=nvptx-none=/build/gcc-11-pWTZs6/gcc-11-11.2.0/debian/tmp-nvptx/usr,amdgcn-amdhsa=/build/gcc-11-pWTZs6/gcc-11-11.2.0/debian/tmp-gcn/usr
--without-cuda-driver --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=x86_64-linux-gnu
--with-build-config=bootstrap-lto-lean --enable-link-serialization=2
Thread model: posix
Supported LTO compression algorithms: zlib zstd
gcc version 11.2.0 (Ubuntu 11.2.0-13ubuntu1)
woho@atrala-wohoo:~$ cat /proc/version
Linux version 5.11.0-37-generic (buildd@lcy01-amd64-021) (gcc (Ubuntu
9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34)
#41~20.04.2-Ubuntu SMP Fri Sep 24 09:06:38 UTC 2021
woho@atrala-wohoo:~$ cat /etc/issue
Ubuntu Jammy Jellyfish (development branch)
