uclibc: add explicit setup of ARC-specific options

As with other architectures for ARC we need to have an ability to set
specific options in uClibc.

In particular this is required for selection of ARC ISA version.

[Peter: string type, so must be in quotes as noted by Yann]
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: Anton Kolesov <akolesov@synopsys.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/uclibc/Config.in

@@ -194,6 +194,12 @@ config BR2_UCLIBC_TARGET_ARCH
 	default i386	   if BR2_i386
 	default x86_64	   if BR2_x86_64
 
+config BR2_UCLIBC_ARC_TYPE
+	string
+	depends on BR2_UCLIBC_TARGET_ARCH = "arc"
+	default "ARC_CPU_700"	if BR2_arc750d
+	default "ARC_CPU_700"	if BR2_arc770d
+
 config BR2_UCLIBC_ARM_BX
 	bool
 	depends on BR2_UCLIBC_TARGET_ARCH = "arm"

package/uclibc/uclibc.mk

@@ -56,6 +56,17 @@ UCLIBC_LOCALES = $(foreach locale,$(GENERATE_LOCALE),\
 		   $(firstword $(subst .,$(space),$(locale))))
 endif
 
+#
+# ARC definitions
+#
+
+ifeq ($(UCLIBC_TARGET_ARCH),arc)
+UCLIBC_ARC_TYPE = CONFIG_$(call qstrip,$(BR2_UCLIBC_ARC_TYPE))
+define UCLIBC_ARC_TYPE_CONFIG
+	$(call KCONFIG_ENABLE_OPT,$(UCLIBC_ARC_TYPE),$(@D)/.config)
+endef
+endif # arc
+
 #
 # ARM definitions
 #
@@ -410,6 +421,7 @@ define UCLIBC_KCONFIG_FIXUP_CMDS
 	$(call KCONFIG_SET_OPT,DEVEL_PREFIX,"/usr",$(@D)/.config)
 	$(call KCONFIG_SET_OPT,SHARED_LIB_LOADER_PREFIX,"/lib",$(@D)/.config)
 	$(UCLIBC_MMU_CONFIG)
+	$(UCLIBC_ARC_TYPE_CONFIG)
 	$(UCLIBC_ARM_ABI_CONFIG)
 	$(UCLIBC_ARM_BX_CONFIG)
 	$(UCLIBC_MIPS_ABI_CONFIG)