-* gcc: versions 4.5.x or later is recommended for ``i686/x86_64``. Versions 4.8.x or later is recommended
- for ``ppc_64`` and ``x86_x32`` ABI. On some distributions, some specific compiler flags and linker flags are enabled by
+* gcc: versions 4.9 or later is recommended for all platforms.
+ On some distributions, some specific compiler flags and linker flags are enabled by