From: Christophe LEROY
> Sent: 13 January 2017 12:15
> > Which leads to TARGET_LIBC_PROVIDES_SSP being undefined (it would normally
> > be true for glibc >= 2.4), and that is all.  Mystery solved.  Thanks!
> >
> Is there a way to know during compilation how the compiler will behave,
> in order to select the correct method ?
> I have drafted a new approach in the kernel that uses -0x7008(r2)
> instead of the global __stack_chk_guard, but how can I select the proper
> approach during kernel compilation in line with the selected GCC ?

Worse, how can you ensure that loadable modules are compiled with the
same option as the rest of the kernel.


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