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powerpc: Fix stackprotector detection for non-glibc toolchains
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If GCC is not built with glibc support then we must explicitly tell it
which register to use for TLS mode stack protector, otherwise it will
error out and the cc-option check will fail.

Signed-off-by: Michael Ellerman <[email protected]>
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@mpe
mpe committed Oct 13, 2018
1 parent 50530f5 commit bf6cbd0
Showing 1 changed file with 2 additions and 1 deletion.
3 changes: 2 additions & 1 deletion arch/powerpc/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -180,7 +180,8 @@ config PPC
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_CBPF_JIT if !PPC64
select HAVE_STACKPROTECTOR if $(cc-option,-mstack-protector-guard=tls)
select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13)
select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2)
select HAVE_CONTEXT_TRACKING if PPC64
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_STACKOVERFLOW
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