http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56557
Bug #: 56557
Summary: Link error about `std::fstream' or `std::stringstream'
with `-flto' and `-rdynamic' options
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ai.az...@gmail.com
Created attachment 29605
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=29605
Output of -v option
The following code results in a link error when compiling on GCC 4.8.0 20130303
with `-flto' and `-rdynamic' options;
//================
#include <fstream>
int main()
{
std::fstream x;
}
//================
The link error is;
cryolite@ubuntu:~/work/gcc-bugs/20130306$ ~/local/gcc-4.8-20130303/bin/g++
-flto -rdynamic main.cpp
/usr/bin/ld: a.out: hidden symbol
`_ZTCSt13basic_fstreamIcSt11char_traitsIcEE0_Sd' isn't defined
/usr/bin/ld: final link failed: Bad value
collect2: error: ld returned 1 exit status
Other specializations of `std::basic_fstream' or `std::basic_stringstream' have
the similar issue.
As far as I can confirm, this problem is not reproduced with 4.6.4 20130301 or
4.7.3 20130302. Thus, this seems a regression.
