Bump buidlroot version to 2018.02.6

bsp/buildroot/arch/Config.in

@@ -79,12 +79,22 @@ config BR2_aarch64_be
 config BR2_bfin
 	bool "Blackfin"
 	select BR2_ARCH_HAS_FDPIC_SUPPORT
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_6
 	help
 	  The Blackfin is a family of 16 or 32-bit microprocessors developed,
 	  manufactured and marketed by Analog Devices.
 	  http://www.analog.com/
 	  http://en.wikipedia.org/wiki/Blackfin
 
+config BR2_csky
+	bool "csky"
+	select BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
+	select BR2_ARCH_HAS_MMU_MANDATORY
+	help
+	  csky is processor IP from china.
+	  http://www.c-sky.com/
+	  http://www.github.com/c-sky
+
 config BR2_i386
 	bool "i386"
 	select BR2_ARCH_HAS_MMU_MANDATORY
@@ -242,6 +252,37 @@ config BR2_xtensa
 
 endchoice
 
+# For some architectures or specific cores, our internal toolchain
+# backend is not suitable (like, missing support in upstream gcc, or
+# no ChipCo fork exists...)
+config BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
+	bool
+
+config BR2_ARCH_HAS_TOOLCHAIN_BUILDROOT
+	bool
+	default y if !BR2_ARCH_HAS_NO_TOOLCHAIN_BUILDROOT
+
+# The following symbols are selected by the individual
+# Config.in.$ARCH files
+config BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8
+	bool
+
+config BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9
+	bool
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_4_8
+
+config BR2_ARCH_NEEDS_GCC_AT_LEAST_5
+	bool
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_4_9
+
+config BR2_ARCH_NEEDS_GCC_AT_LEAST_6
+	bool
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_5
+
+config BR2_ARCH_NEEDS_GCC_AT_LEAST_7
+	bool
+	select BR2_ARCH_NEEDS_GCC_AT_LEAST_6
+
 # The following string values are defined by the individual
 # Config.in.$ARCH files
 config BR2_ARCH
@@ -256,6 +297,12 @@ config BR2_GCC_TARGET_ARCH
 config BR2_GCC_TARGET_ABI
 	string
 
+config BR2_GCC_TARGET_NAN
+	string
+
+config BR2_GCC_TARGET_FP32_MODE
+	string
+
 config BR2_GCC_TARGET_CPU
 	string
 
@@ -284,6 +331,12 @@ config BR2_GCC_TARGET_MODE
 config BR2_BINFMT_SUPPORTS_SHARED
 	bool
 
+# Must match the name of the architecture from readelf point of view,
+# i.e the "Machine:" field of readelf output. See get_machine_name()
+# in binutils/readelf.c for the list of possible values.
+config BR2_READELF_ARCH_NAME
+	string
+
 # Set up target binary format
 choice
 	prompt "Target Binary Format"
@@ -369,6 +422,10 @@ if BR2_bfin
 source "arch/Config.in.bfin"
 endif
 
+if BR2_csky
+source "arch/Config.in.csky"
+endif
+
 if BR2_m68k
 source "arch/Config.in.m68k"
 endif