https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90670
Bug ID: 90670
Summary: const& template parameter in a header trips
-Wsubobject-linkage
Product: gcc
Version: 8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: adam1.byrd at gmail dot com
Target Milestone: ---
Placing the following code in a header and including it will spuriously cause
the -Wsubobject-linkage warning. No special flags need to be set to trigger
this. I've tested with 7.4 and 8.0.
template <const int&>
class seChildScheduleAccess {};
constexpr int DummyId = 0;
struct seGccBugJob
{
seChildScheduleAccess<DummyId> m_test;
};
In file included from gcc_bug_job.cpp:1:0:
gcc_bug_job.h:6:8: warning: ‘seGccBugJob’ has a field ‘seGccBugJob::m_test’
whose type uses the anonymous namespace [-Wsubobject-linkage]
struct seGccBugJob
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-linux-gnu/7/lto-wrapper
OFFLOAD_TARGET_NAMES=nvptx-none
OFFLOAD_TARGET_DEFAULT=1
Target: x86_64-linux-gnu
Configured with: ../src/configure -v --with-pkgversion='Ubuntu
7.4.0-1ubuntu1~18.04' --with-bugurl=file:///usr/share/doc/gcc-7/README.Bugs
--enable-languages=c,ada,c++,go,brig,d,fortran,objc,obj-c++ --prefix=/usr
--with-gcc-major-version-only --program-suffix=-7
--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 --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-libmpx --enable-plugin --enable-default-pie
--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 --without-cuda-driver
--enable-checking=release --build=x86_64-linux-gnu --host=x86_64-linux-gnu
--target=x86_64-linux-gnu
Thread model: posix
gcc version 7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04)
