csky: Select ARCH_WANT_FRAME_POINTERS only if compiler supports it

Compiling csky:allmodconfig with an upstream C compiler results
in the following error.

csky-linux-gcc: error:
	unrecognized command-line option '-mbacktrace';
	did you mean '-fbacktrace'?

Select ARCH_WANT_FRAME_POINTERS only if gcc supports it to
avoid the error.

Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Guo Ren <guoren@kernel.org>

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index 9d4d898..58ca3ef 100644 (file)
--- 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
-       select ARCH_WANT_FRAME_POINTERS if !CPU_CK610
+       select ARCH_WANT_FRAME_POINTERS if !CPU_CK610 && $(cc-option,-mbacktrace)
        select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
        select COMMON_CLK
        select CLKSRC_MMIO