https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115479
Bug ID: 115479
Summary: undefined reference to [abi:cxx11] with variadic
template of constexpr template structs
Product: gcc
Version: 14.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: awright at tradebot dot com
Target Milestone: ---
GCC fails to link in this example (https://godbolt.org/z/M5hz8Gxd7). This works
with the latest Clang and MSVC.
For std::string and std::list<> types, it appears the compiled source is
missing the [abi:cxx11] tag.
$ nm --demangle main.cpp.o | rg process
U process(Configurator<STRING_PARAM[abi:cxx11], LIST_PARAM[abi:cxx11]> const&)
$ nm --demangle config.cpp.o | rg process
0000000000000000 T process(Configurator<STRING_PARAM, LIST_PARAM> const&)
If the tag is specified explicitly with `__attribute__((abi_tag("cxx11")))`,
linkage succeeds.
