ARM: remove sub-arch/variants selection from menuconfig

Rely on the compiler to be correctly set up to generate
appropriate code for the target variant.

This exposes the Thumb option, as it is no longer auto-selected.
The "Use BX" no longer depends on supported CPU to be selected,
so it now defaults to 'n' as it shall work by default on CPUs
that do not have BX.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr>
Cc: Khem Raj <raj.khem@gmail.com>
Cc: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Cc: Carmelo AMOROSO <carmelo.amoroso@st.com>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

Rules.mak

@@ -335,25 +335,6 @@ endif
 ifeq ($(TARGET_ARCH),arm)
 	CPU_CFLAGS-$(ARCH_LITTLE_ENDIAN)+=-mlittle-endian
 	CPU_CFLAGS-$(ARCH_BIG_ENDIAN)+=-mbig-endian
-	CPU_CFLAGS-$(CONFIG_GENERIC_ARM)+=
-	CPU_CFLAGS-$(CONFIG_ARM610)+=-mtune=arm610 -march=armv3
-	CPU_CFLAGS-$(CONFIG_ARM710)+=-mtune=arm710 -march=armv3
-	CPU_CFLAGS-$(CONFIG_ARM7TDMI)+=-mtune=arm7tdmi -march=armv4t
-	CPU_CFLAGS-$(CONFIG_ARM720T)+=-mtune=arm7tdmi -march=armv4t
-	CPU_CFLAGS-$(CONFIG_ARM920T)+=-mtune=arm9tdmi -march=armv4t
-	CPU_CFLAGS-$(CONFIG_ARM922T)+=-mtune=arm9tdmi -march=armv4t
-	CPU_CFLAGS-$(CONFIG_ARM926T)+=-mtune=arm9e -march=armv5te
-	CPU_CFLAGS-$(CONFIG_ARM10T)+=-mtune=arm10tdmi -march=armv5t
-	CPU_CFLAGS-$(CONFIG_ARM1136JF_S)+=-mtune=arm1136jf-s -march=armv6
-	CPU_CFLAGS-$(CONFIG_ARM1176JZ_S)+=-mtune=arm1176jz-s -march=armv6
-	CPU_CFLAGS-$(CONFIG_ARM1176JZF_S)+=-mtune=arm1176jzf-s -march=armv6
-	CPU_CFLAGS-$(CONFIG_ARM_SA110)+=-mtune=strongarm110 -march=armv4
-	CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4
-	CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110)
-	CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale
-	CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt
-	CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3
-	CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1
 	CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb
 endif
 

extra/Configs/Config.arm

@@ -30,129 +30,14 @@ config CONFIG_ARM_EABI
 
 endchoice
 
-choice
-	prompt "Target Processor Type"
-	default CONFIG_GENERIC_ARM
-	help
-	  This is the processor type of your CPU. This information is used for
-	  optimizing purposes.  To build a library that will run on all ARMCPU
-	  types (albeit not optimally fast), you can specify "Generic Arm" here.
-	  If you pick anything other than "Generic Arm", there is no guarantee 
-	  that uClibc will even run on anything other than the selected
-	  processor type.
-
-	  Here are the settings recommended for greatest speed:
-	  - "Generic Arm" select this if your compiler is already setup to
-	    optimize things properly, or if you want to run on pretty much
-	    everything, or you just don't much care.
-	  - For anything else, pick the ARM core type that best matches the
-	    cpu you will be using on your device.
-
-	  If you don't know what to do, choose "Generic Arm".
-
-config CONFIG_GENERIC_ARM
-	bool "Generic Arm"
-
-config CONFIG_ARM610
-	bool "Arm 610"
-	select ARCH_HAS_MMU
-
-config CONFIG_ARM710
-	bool "Arm 710"
-	select ARCH_HAS_MMU
-
-config CONFIG_ARM7TDMI
-	bool "Arm 7TDMI"
-	select ARCH_HAS_NO_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM720T
-	bool "Arm 720T"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM920T
-	bool "Arm 920T"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM922T
-	bool "Arm 922T"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM926T
-	bool "Arm 926T"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM10T
-	bool "Arm 10T"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM1136JF_S
-	bool "Arm 1136JF-S"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM1176JZ_S
-	bool "Arm 1176JZ-S"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM1176JZF_S
-	bool "Arm 1176JZF-S"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM_CORTEX_M3
-	bool "Arm Cortex-M3"
-	select ARCH_HAS_NO_MMU
-	select FORCE_THUMB
-
-config CONFIG_ARM_CORTEX_M1
-	bool "Arm Cortex-M1"
-	select ARCH_HAS_NO_MMU
-	select FORCE_THUMB
-
-config CONFIG_ARM_SA110
-	bool "Intel StrongArm SA-110"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM_SA1100
-	bool "Intel StrongArm SA-1100"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM_XSCALE
-	bool "Intel Xscale"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-config CONFIG_ARM_IWMMXT
-	bool "Intel Xscale With WMMX PXA27x"
-	select ARCH_HAS_MMU
-	select HAS_THUMB
-
-endchoice
-
-config HAS_THUMB
-	bool
-
-config FORCE_THUMB
-	bool
-	select HAS_THUMB
-	select COMPILE_IN_THUMB_MODE
-	select USE_BX
-
 config COMPILE_IN_THUMB_MODE
-	bool
+	bool "Build using Thumb mode"
+	select USE_BX
+	help
+	  Say 'y' here to force building uClibc in thumb mode.
+	  Say 'n' to use your compiler's default mode.
 
 config USE_BX
 	bool "Use BX in function return"
-	default y
-	depends on HAS_THUMB
 	help
 	  Use BX instruction for THUMB aware architectures.