gdb-multiarch 7.4-2012.02-0ubuntu1 (amd64 binary) in ubuntu precise

 GDB is a source-level debugger, capable of breaking programs at
 any specific line, displaying variable values, and determining
 where errors occurred. Currently, it works for C, C++, Fortran
 Modula 2 and Java programs. A must-have for any serious
 programmer.
 .
 This package contains a version of GDB which supports multiple
 target architectures.