d7d27b90   
   From: miles@gnu.org   
      
   ptyxs  writes:   
   > On Sep 24, 1:40 am, Miles Bader  wrote:   
   >> It looks, then, like the g++ installation on your machine may simply   
   >> be broken.   
   >>   
   >> [As I mentioned before, your example / command work fine with g++ on   
   >> Debian, with g++ 4.4 - 4.7, and clang++-trunk.]   
   >   
   > I tried the same programs (with and without 'std::' in front of sqrt)   
   > on g++ 4.5.2 on a completely different installation (Ubuntu 10.04) and   
   > I noticed exactly the same behaviors as with 4.6.1 on Mandriva 2011.   
      
   Then presumably ubuntu 10.04 is broken in the same way -- it may be an   
   upstream bug that has been fixed since (ubuntu 10.04 is somewhat old).   
      
   The Debian versions I tried (none of which exhibit your problem):   
      
     g++-4.4 (Debian 4.4.6-11) 4.4.6   
     g++-4.5 (Debian 4.5.3-9) 4.5.3   
     g++-4.6 (Debian 4.6.1-11) 4.6.1   
     g++ (Debian 20110914-1) 4.7.0 20110914 (experimental) [trunk revision 178863]   
      
   These probably all have fixes applied from the upstream maintenance   
   branch that are weren't in the original release.   
      
   > (btw gcc 4.7.0 is described as 'in development' on the official page   
   > of gcc).   
      
   Yes, it's the development trunk.  Can't hurt to try that too   
   though... :]   
      
   Maybe you could get a more informed answer by sending a message to   
   gcc-help@gcc.gnu.org ?   
      
   -Miles   
      
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