http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53675
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> 2012-07-04 09:22:58 UTC --- I'm still seeing junk dwarf info: /usr/bin/ld: Dwarf Error: found dwarf version '0', this reader only handles version 2 and 3 information. 2.cc:(.text._Z6test01v+0x73): undefined reference to `std::chrono::steady_clock::now()' /usr/bin/ld: Dwarf Error: found dwarf version '12425', this reader only handles version 2 and 3 information. 2.cc:(.text._Z6test01v+0xe1): undefined reference to `std::chrono::steady_clock::now()' collect2: error: ld returned 1 exit status Will investigate ...