Svadev mailing list

["Adve, Vikram Sadanand" <vadve AT illinois.edu>]

Why is svadev set to members-only posting?  I like the llvmdev policy better: anyone can post but replies only go to the list, so there is strong incentive to join the list if you want to ask questions.

--Vikram Adve
Professor, Department of Computer Science
University of Illinois at Urbana-Champaign
vadve AT illinois.edu

http://llvm.org

Begin forwarded message:

From: <svadev-owner AT cs.uiuc.edu>

Subject: svadev post from cieniuch77 AT gmail.com requires approval

Date: July 18, 2013 11:36:43 AM CDT

To: <svadev-owner AT cs.uiuc.edu>

As list administrator, your authorization is requested for the
following mailing list posting:

   List:    svadev AT cs.uiuc.edu
   From:    cieniuch77 AT gmail.com
   Subject: fmemsafety option and optimization level
   Reason:  Post by non-member to a members-only list

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From: Krzysztof Cieniuch <cieniuch77 AT gmail.com>

Subject: fmemsafety option and optimization level

Date: July 18, 2013 11:35:45 AM CDT

To: <svadev AT cs.uiuc.edu>

Hi,

I'm using CentOS 6.3, clang version 3.2  with latest ld checked out from cvs
I followed instructions on wiki and installed clang with lto (gold plugin)

I'm having troubles compiling this simple program:

#include<string>
#include<map>
#include<iostream>

using namespace std;
int main(int argc,char** argv){
   map<string,int> themap;
   string test(argv[0]);

   themap["key1"]=1;
   cout << test << endl;

   return 0;
}

clang++ -g  -O2 -flto -use-gold-plugin -fmemsafety  -o main main.cc  -L /opt/SAFECode/lib

FIXME: Ignoring global of size zero: @_ZNSs4_Rep20_S_empty_rep_storageE = external global [0 x i64]
lto-llvm.o-O8q9Q2:ld-temp.o:TargetList: error: undefined reference to 'std::string::_S_compare(unsigned long, unsigned long)'
lto-llvm.o-O8q9Q2:ld-temp.o:TargetList1: error: undefined reference to 'std::string::_S_compare(unsigned long, unsigned long)'

If I remove -O2 option it links fine.
What's strange if you comment  out line:  themap["key1"]=1; it will compile.
What even more strange :-) if you comment out:  cout << test << endl; instead it will also compile any ideas ?
Is this bug in clang ld or libstdc++ on centos 6.3 or combination of all.

Thanks
Krzysztof

From: <svadev-request AT cs.uiuc.edu>

Subject: confirm fc0c7bd496728a23df097e51d741e135e270cd13

Date: July 18, 2013 11:36:43 AM CDT

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