https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64560
Bug ID: 64560
Summary: [5 Regression] building libstdc++ with -fno-rtti fails
in new cxx11-shim-facets.cc file
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: redi at gcc dot gnu.org
Someone on IRC pointed out that the build fails when configuring with
--enable-cxx-flags=-fno-rtti
In file included from
/home/jwakely/src/gcc/libstdc++-v3/src/c++11/cow-shim_facets.cc:35:0:
/home/jwakely/src/gcc/libstdc++-v3/src/c++11/cxx11-shim_facets.cc: In member
function ‘const std::locale::facet* std::locale::facet::_M_cow_shim(const
std::locale::id*) const’:
/home/jwakely/src/gcc/libstdc++-v3/src/c++11/cxx11-shim_facets.cc:772:51:
error: ‘dynamic_cast’ not permitted with -fno-rtti
if (auto* p = dynamic_cast<const __shim*>(this))
^
