On Tue, Jul 21, 2020 at 01:23:14PM +0200, Joerg Roedel wrote:
> From: Joerg Roedel <jroedel@xxxxxxx>
>
> Building a kernel for the CSKY architecture with CONFIG_FRAME_POINTER
> set requires a gcc supporting the non-upstream '-mbacktrace' option.
> Check for the '-mbacktrace' option before enabling CONFIG_FRAMEPOINTER
> and fix building CSKY with an upstream gcc compiler.
>
> Signed-off-by: Joerg Roedel <jroedel@xxxxxxx>
Reviewed-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
> ---
> arch/csky/Kconfig | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
> index bd31ab12f77d..1622e1c56026 100644
> --- a/arch/csky/Kconfig
> +++ b/arch/csky/Kconfig
> @@ -8,7 +8,7 @@ config CSKY
> select ARCH_HAS_SYNC_DMA_FOR_DEVICE
> select ARCH_USE_BUILTIN_BSWAP
> select ARCH_USE_QUEUED_RWLOCKS if NR_CPUS>2
> - select ARCH_WANT_FRAME_POINTERS if !CPU_CK610
> + select ARCH_WANT_FRAME_POINTERS if (!CPU_CK610 && STACKTRACE_SUPPORT)
> select COMMON_CLK
> select CLKSRC_MMIO
> select CSKY_MPINTC if CPU_CK860
> @@ -125,7 +125,7 @@ config MMU
> def_bool y
>
> config STACKTRACE_SUPPORT
> - def_bool y
> + def_bool $(success,echo 'int foo(void) { return 0; }' | $(CC) -mbacktrace -x c - -c -o /dev/null)
>
> config TIME_LOW_RES
> def_bool y
> --
> 2.27.0
>
