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* [Bug libstdc++/64560] New: [5 Regression] building libstdc++ with -fno-rtti fails in new cxx11-shim-facets.cc file
@ 2015-01-11 13:11 redi at gcc dot gnu.org
2015-01-11 13:11 ` [Bug libstdc++/64560] " redi at gcc dot gnu.org
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: redi at gcc dot gnu.org @ 2015-01-11 13:11 UTC (permalink / raw)
To: gcc-bugs
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))
^
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/64560] [5 Regression] building libstdc++ with -fno-rtti fails in new cxx11-shim-facets.cc file
Date: Sun, 11 Jan 2015 15:23:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?idd560
--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
--- a/libstdc++-v3/src/c++11/cxx11-shim_facets.cc
+++ b/libstdc++-v3/src/c++11/cxx11-shim_facets.cc
@@ -768,9 +768,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION
{
using namespace __facet_shims;
+#if __cpp_rtti
// If this is already a shim just use its underlying facet.
if (auto* p = dynamic_cast<const __shim*>(this))
return p->_M_get();
+#endif
if (which == &numpunct<char>::id)
return new numpunct_shim<char>{this};
^ permalink raw reply [flat|nested] 5+ messages in thread
end of thread, other threads:[~2015-01-12 21:47 UTC | newest]
Thread overview: 5+ messages (download: mbox.gz / follow: Atom feed)
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2015-01-11 13:11 [Bug libstdc++/64560] New: [5 Regression] building libstdc++ with -fno-rtti fails in new cxx11-shim-facets.cc file redi at gcc dot gnu.org
2015-01-11 13:11 ` [Bug libstdc++/64560] " redi at gcc dot gnu.org
2015-01-12 9:35 ` rguenth at gcc dot gnu.org
2015-01-12 21:46 ` redi at gcc dot gnu.org
2015-01-12 21:47 ` redi at gcc dot gnu.org
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