[PATCH v2 07/10] MIPS: Implement custom CC_CAN_LINK

[Thomas Weißschuh]

The generic CC_CAN_LINK detection does not handle different byte orders.
This may lead to userprogs which are not actually runnable on the target
kernel.

Use architecture-specific logic supporting byte orders instead.

Signed-off-by: Thomas Weißschuh <thomas.weissschuh at linutronix.de>
---
 arch/mips/Kconfig | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index e8683f58fd3e2a43bf9384e1c3c3e454a8e59861..b4f07558ad395eb9bb626a264a2e00fdfbdb7f72 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -4,6 +4,7 @@ config MIPS
 	default y
 	select ARCH_32BIT_OFF_T if !64BIT
 	select ARCH_BINFMT_ELF_STATE if MIPS_FP_SUPPORT
+	select ARCH_HAS_CC_CAN_LINK
 	select ARCH_HAS_CPU_CACHE_ALIASING
 	select ARCH_HAS_CPU_FINALIZE_INIT
 	select ARCH_HAS_CURRENT_STACK_POINTER
@@ -3126,6 +3127,20 @@ config CC_HAS_MNO_BRANCH_LIKELY
 config CC_HAS_BROKEN_INLINE_COMPAT_BRANCH
 	def_bool y if CC_IS_CLANG
 
+config ARCH_CC_CAN_LINK
+	bool
+	default $(cc_can_link_user,-m64 -EL) if 64BIT && CPU_LITTLE_ENDIAN
+	default $(cc_can_link_user,-m64 -EB) if 64BIT && CPU_BIG_ENDIAN
+	default $(cc_can_link_user,-m32 -EL) if CPU_LITTLE_ENDIAN
+	default $(cc_can_link_user,-m32 -EB) if CPU_BIG_ENDIAN
+
+config ARCH_USERFLAGS
+	string
+	default "-m64 -EL" if 64BIT && CPU_LITTLE_ENDIAN
+	default "-m64 -EB" if 64BIT && CPU_BIG_ENDIAN
+	default "-m32 -EL" if CPU_LITTLE_ENDIAN
+	default "-m32 -EB" if CPU_BIG_ENDIAN
+
 menu "Power management options"
 
 config ARCH_HIBERNATION_POSSIBLE

-- 
2.51.0