csky: Fix build with upstream gcc

PATCH New Joerg Roedel 1 participant 1 message Jul 21, 2020 C-sky architecture

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Joerg Roedel

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2020-07-21 11:23 UTC #0 lore raw

PATCH 1/1 csky: Fix build with upstream gcc

From: Joerg Roedel <[email protected]>

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 <[email protected]>

---
 arch/csky/Kconfig | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

arch/csky/Kconfig +2 -2

index bd31ab12f77d..1622e1c56026 100644
@@ -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

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2.27.0