config FREETZ_GCC_ABI
	string
	default "aapcs-linux" if FREETZ_TARGET_ARCH_ARM
	default "32"          if FREETZ_TARGET_ARCH_MIPS

#
# The following code is a trade-off between being absolutely correct on the one hand
# and our wish to reduce the number of download toolchains to support on the other hand.
#
# Being correct means the GCC_TUNE value must be the same as the CPU_MODEL value. Being
# a bit incorrect (we use a downward compatible value) allows us to use the same
# download toolchain for different CPU_MODEL's. As of now our download toolchains
# are only uClibc and kernel-version dependent but not GCC_TUNE value. Being absolutely
# correct would require to make them also GCC_TUNE value dependent.
#
# TODO: Analyse performance loss (if any) resulting from using compatible values.
#       According to some sources on the net [1] there is no gain from using
#       values above 24kc.
#
#       [1] http://lists.infradead.org/pipermail/lede-dev/2016-August/002351.html
#

# -march=%
config FREETZ_GCC_ARCH
	string
	#
	default "armv7-a" if \
		FREETZ_CPU_MODEL_ARM_cortex_a9
	#
	# 4KEc CPUs are mips32r2, so the correct value is actually mips32r2
	# s. https://github.com/gcc-mirror/gcc/blob/gcc-8_1_0-release/gcc/config/mips/mips-cpus.def#L107
	#
	# For some reasons AVM uses mips32 for AR7-{SANGAM,OHIO} boxes and mips32r2 for UR8 boxes.
	#
	# TODO: check if we can use mips32r2 even though AVM uses mips32
	#
	default "mips32"   if \
		FREETZ_CPU_MODEL_MIPS_4KEc
	#
	default "mips32r2" if \
		FREETZ_CPU_MODEL_MIPS_24KEc || \
		FREETZ_CPU_MODEL_MIPS_34Kc  || \
		FREETZ_CPU_MODEL_MIPS_74Kc  || \
		FREETZ_CPU_MODEL_MIPS_interAptiv
	#
	default "atom" if \
		FREETZ_CPU_MODEL_X86_ATOM

# -mcpu=%, -mtune=%
config FREETZ_GCC_CPU
	string
	default "cortex-a9" if \
		FREETZ_CPU_MODEL_ARM_cortex_a9
	#
	# TODO: the correct value is "4kec", which would result in mips32r2 binaries instead of mips32
	#
	default "4kc"      if \
		FREETZ_CPU_MODEL_MIPS_4KEc
	#
	# we use the same download toolchain for all uClibc-XXX / kernel-2.6.28..2.6.32 based boxes
	#
	# all mips BE boxes with kernel <= 2.6.32.X, i.e
	# - IKS     - all Fritz!OS versions
	# - AR9     - all Fritz!OS versions
	# - AR934x  - all Fritz!OS versions
	# - AR10    - all Fritz!OS versions
	# - VR9     - Fritz!OS versions < 6.5X
	# - QCA955x - all Fritz!OS versions
	# - QCA956x - all Fritz!OS versions
	default "24kc"     if \
		FREETZ_CPU_MODEL_MIPS_24KEc || \
		(FREETZ_CPU_MODEL_MIPS_34Kc && FREETZ_KERNEL_VERSION_2_6_32_MAX) || \
		FREETZ_CPU_MODEL_MIPS_74Kc
	#
	# we use the same download toolchain for all VR9/GRX5 / uClibc-XXX / kernel-3.10 based boxes
	#
	# all mips BE boxes with kernel >= 3.10.X, i.e.
	# - VR9     - Fritz!OS versions >= 6.5X
	# - GRX5    - Fritz!OS versions >= 6.5X
	#
	# @interAptiv: not sure if 34kc is the correct value, it's at least the value used by AVM.
	#              AVM patches GRX5 kernel sources and sets 34kc instead of mips32r2 for CPU_MIPS32_R2 symbol.
	#
	default "34kc"     if \
		(FREETZ_CPU_MODEL_MIPS_34Kc && FREETZ_KERNEL_VERSION_3_10_MIN) || \
		FREETZ_CPU_MODEL_MIPS_interAptiv
	#
	default "atom" if \
		FREETZ_CPU_MODEL_X86_ATOM

# -mfpu=%
config FREETZ_GCC_FPU
	string
	default "neon"     if FREETZ_TARGET_ARCH_ARM  && FREETZ_CPU_MODEL_ARM_cortex_a9

# -mfloat-abi=% (ARM) / -m%-float (MIPS)
config FREETZ_GCC_FLOAT_ABI
	string
	default "softfp"   if FREETZ_TARGET_ARCH_ARM  && FREETZ_CPU_MODEL_ARM_cortex_a9
	default "soft"     if FREETZ_TARGET_ARCH_MIPS

# -mmode=%
config FREETZ_GCC_MODE
	string
	default "arm"      if FREETZ_TARGET_ARCH_ARM  && FREETZ_CPU_MODEL_ARM_cortex_a9