-D_FORTIFY_SOURCE=2 and C++

Hi! Starting with gcc-4.1.2-25 and glibc-2.6.90-14 -D_FORTIFY_SOURCE=2 protects not only C code, but also C++. There have been several security issues already which would have been unexploitable if this checking was in place earlier. All the mem*, str* etc. routines that were previously protected in C will now do so in C++ as well, similarly *printf won't accept %n if format string is in writable memory, open{,at}{,64} functions are checked too (compile time detecteable O_CREAT with only 2 arguments (3 for openat{,64}) results in link time errors, if it is unclear whether oflag arg has O_CREAT or not at compile time and only 2 (resp. 3 for openat{,64}) args are provided, runtime checking is done). BTW, even for C open is no longer a function-like macro, while it is desirable to fix packages that don't allow open to be defined as function-like macro, it will no longer be a necessity for F8 to change this. If you see any bugs on the toolchain side (rather than newly discovered package bugs), please let us know in bugzilla ASAP. Thanks. Jakub