arch: move definition of KERNEL_ARCH to Config.in.<arch> files

Similar to other arch-specific strings, the 'KERNEL_ARCH' variable can be
determined from Config.in.<arch> files.

Besides aligning with similar strings, this also means simplification: the
big 'sed' covers several architectures not even supported by Buildroot.

Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire@nokia.com>
Reviewed-by: Romain Naour <romain.naour@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

Makefile

@@ -437,22 +437,7 @@ QUIET := $(if $(findstring s,$(filter-out --%,$(MAKEFLAGS))),-q)
 
 # Strip off the annoying quoting
 ARCH := $(call qstrip,$(BR2_ARCH))
-
-KERNEL_ARCH := $(shell echo "$(ARCH)" | sed -e "s/-.*//" \
-	-e s/i.86/i386/ -e s/sun4u/sparc64/ \
-	-e s/arcle/arc/ \
-	-e s/arceb/arc/ \
-	-e s/arm.*/arm/ -e s/sa110/arm/ \
-	-e s/aarch64.*/arm64/ \
-	-e s/nds32.*/nds32/ \
-	-e s/or1k/openrisc/ \
-	-e s/parisc64/parisc/ \
-	-e s/powerpc64.*/powerpc/ \
-	-e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
-	-e s/riscv.*/riscv/ \
-	-e s/sh.*/sh/ \
-	-e s/s390x/s390/ \
-	-e s/microblazeel/microblaze/)
+KERNEL_ARCH := $(call qstrip,$(BR2_KERNEL_ARCH))
 
 ZCAT := $(call qstrip,$(BR2_ZCAT))
 BZCAT := $(call qstrip,$(BR2_BZCAT))

arch/Config.in

@@ -328,6 +328,9 @@ config BR2_ARCH_NEEDS_GCC_AT_LEAST_11
 config BR2_ARCH
 	string
 
+config BR2_KERNEL_ARCH
+	string
+
 config BR2_ENDIAN
 	string
 

arch/Config.in.arc

@@ -62,6 +62,9 @@ config BR2_ARCH
 	default "arc"	if BR2_arcle
 	default "arceb"	if BR2_arceb
 
+config BR2_KERNEL_ARCH
+	default "arc"
+
 config BR2_arc
 	bool
 	default y if BR2_arcle || BR2_arceb

arch/Config.in.arm

@@ -822,6 +822,10 @@ config BR2_ARCH
 	default "aarch64"	if BR2_aarch64
 	default "aarch64_be"	if BR2_aarch64_be
 
+config BR2_KERNEL_ARCH
+	default "arm"		if BR2_arm || BR2_armeb
+	default "arm64"		if BR2_aarch64 || BR2_aarch64_be
+
 config BR2_ENDIAN
 	default "LITTLE" if (BR2_arm || BR2_aarch64)
 	default "BIG"	 if (BR2_armeb || BR2_aarch64_be)

arch/Config.in.csky

@@ -39,6 +39,9 @@ config BR2_GCC_TARGET_FLOAT_ABI
 config BR2_ARCH
 	default "csky"
 
+config BR2_KERNEL_ARCH
+	default "csky"
+
 config BR2_ENDIAN
 	default "LITTLE"
 

arch/Config.in.m68k

@@ -1,6 +1,9 @@
 config BR2_ARCH
 	default "m68k"		if BR2_m68k
 
+config BR2_KERNEL_ARCH
+	default "m68k"
+
 config BR2_ENDIAN
 	default "BIG"
 

arch/Config.in.microblaze

@@ -2,6 +2,9 @@ config BR2_ARCH
 	default "microblazeel"  if BR2_microblazeel
 	default "microblaze"    if BR2_microblazebe
 
+config BR2_KERNEL_ARCH
+	default "microblaze"
+
 config BR2_ENDIAN
 	default "LITTLE" if BR2_microblazeel
 	default "BIG"	 if BR2_microblazebe

arch/Config.in.mips

@@ -235,6 +235,9 @@ config BR2_ARCH
 	default "mips64"	if BR2_mips64
 	default "mips64el"	if BR2_mips64el
 
+config BR2_KERNEL_ARCH
+	default "mips"
+
 config BR2_ENDIAN
 	default "LITTLE"	if BR2_mipsel || BR2_mips64el
 	default "BIG"		if BR2_mips || BR2_mips64

arch/Config.in.nds32

@@ -1,6 +1,9 @@
 config BR2_ARCH
 	default "nds32le"
 
+config BR2_KERNEL_ARCH
+	default "nds32"
+
 config BR2_GCC_TARGET_ARCH
 	default "v3"
 

arch/Config.in.nios2

@@ -1,6 +1,9 @@
 config BR2_ARCH
 	default "nios2"
 
+config BR2_KERNEL_ARCH
+	default "nios2"
+
 config BR2_ENDIAN
 	default "LITTLE"
 

arch/Config.in.or1k

@@ -1,6 +1,9 @@
 config BR2_ARCH
 	default "or1k"
 
+config BR2_KERNEL_ARCH
+	default "openrisc"
+
 config BR2_ENDIAN
 	default "BIG"
 

arch/Config.in.powerpc

@@ -157,6 +157,9 @@ config BR2_ARCH
 	default "powerpc64"	if BR2_powerpc64
 	default "powerpc64le"	if BR2_powerpc64le
 
+config BR2_KERNEL_ARCH
+	default "powerpc"
+
 config BR2_ENDIAN
 	default "BIG"    if BR2_powerpc || BR2_powerpc64
 	default "LITTLE" if BR2_powerpc64le

arch/Config.in.riscv

@@ -118,6 +118,9 @@ config BR2_ARCH
 	default "riscv32" if !BR2_ARCH_IS_64
 	default "riscv64" if BR2_ARCH_IS_64
 
+config BR2_KERNEL_ARCH
+	default "riscv"
+
 config BR2_ENDIAN
 	default "LITTLE"
 

arch/Config.in.s390x

@@ -17,6 +17,9 @@ endchoice
 config BR2_ARCH
 	default "s390x"	if BR2_s390x
 
+config BR2_KERNEL_ARCH
+	default "s390"
+
 config BR2_ENDIAN
 	default "BIG"
 

arch/Config.in.sh

@@ -24,6 +24,9 @@ config BR2_ARCH
 	default "sh4a"		if BR2_sh4a
 	default "sh4aeb"	if BR2_sh4aeb
 
+config BR2_KERNEL_ARCH
+	default "sh"
+
 config BR2_ENDIAN
 	default "LITTLE"	if BR2_sh4 || BR2_sh4a
 	default "BIG"		if BR2_sh2a || BR2_sh4eb || BR2_sh4aeb

arch/Config.in.sparc

@@ -21,6 +21,10 @@ config BR2_ARCH
 	default "sparc"	if BR2_sparc
 	default "sparc64" if BR2_sparc64
 
+config BR2_KERNEL_ARCH
+	default "sparc"	if BR2_sparc
+	default "sparc64" if BR2_sparc64
+
 config BR2_ENDIAN
 	default "BIG"
 

arch/Config.in.x86

@@ -564,6 +564,10 @@ config BR2_ARCH
 	default "i686"		if BR2_i386
 	default "x86_64"	if BR2_x86_64
 
+config BR2_KERNEL_ARCH
+	default "i386"		if !BR2_x86_64
+	default "x86_64"	if BR2_x86_64
+
 config BR2_ENDIAN
 	default "LITTLE"
 

arch/Config.in.xtensa

@@ -48,6 +48,9 @@ config BR2_ENDIAN
 config BR2_ARCH
 	default "xtensa"	if BR2_xtensa
 
+config BR2_KERNEL_ARCH
+	default "xtensa"
+
 config BR2_READELF_ARCH_NAME
 	default "Tensilica Xtensa Processor"