linux-kernel - [PATCH 1/3] csky: Select ARCH_WANT_FRAME_POINTERS only if compiler supports it

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Date:   Thu, 16 Sep 2021 21:38:36 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Guo Ren <guoren@...nel.org>
Cc:     linux-csky@...r.kernel.org, linux-kernel@...r.kernel.org,
        Guenter Roeck <linux@...ck-us.net>
Subject: [PATCH 1/3] 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@...ck-us.net>
---
 arch/csky/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/csky/Kconfig b/arch/csky/Kconfig
index 9d4d898df76b..58ca3ef02bab 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
-	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
-- 
2.33.0