Had a new known issue: ccache will break the build because we're sym-linking to have our own compiler for host and build systems, but that screws up ccache finding the real compiler.
There is no fix, so the only way to inform the users is to document it: remove ccache.

/trunk/docs/known-issues.txt | 25 21 4 0 +++++++++++++++++++++----
1 file changed, 21 insertions(+), 4 deletions(-)

 # x86 specific options

 config ARCH_x86

     select ARCH_SUPPORT_ARCH

     select ARCH_SUPPORT_CPU

     select ARCH_SUPPORT_TUNE

     help

       The x86 architecture, as defined by:

         http://www.intel.com/