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a3ca06c3b4
kernel compiler is not special and we currently have it so we want to pass -march and -mtune options as CFLAGS to kernel build so that compiler picks the right subarch flags when compiling assembly files in particular. Otherwise defaults are chosen which may not be right in many case e.g. when compiling kernel for collie machine we should use arch=armv4 but it uses toolchain/as defaults which is armv5te in some case e.g. thumb1 we know that kernel can not be compiled in thumb1 mode so we can provide that information e.g. -marm option through KERNEL_HOST_CC_ARCH variable as we do now (From OE-Core rev: c49f967384ccbfe131bbb33ee518014f3fc4b38f) Signed-off-by: Khem Raj <raj.khem@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
59 lines
2.0 KiB
Plaintext
59 lines
2.0 KiB
Plaintext
#
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# set the ARCH environment variable for kernel compilation (including
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# modules). return value must match one of the architecture directories
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# in the kernel source "arch" directory
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#
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valid_archs = "alpha cris ia64 \
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i386 x86 \
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m68knommu m68k ppc powerpc powerpc64 ppc64 \
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sparc sparc64 \
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arm aarch64 \
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m32r mips \
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sh sh64 um h8300 \
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parisc s390 v850 \
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avr32 blackfin \
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microblaze"
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def map_kernel_arch(a, d):
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import re
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valid_archs = d.getVar('valid_archs', True).split()
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if re.match('(i.86|athlon|x86.64)$', a): return 'x86'
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elif re.match('armeb$', a): return 'arm'
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elif re.match('aarch64$', a): return 'arm64'
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elif re.match('mips(el|64|64el)$', a): return 'mips'
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elif re.match('p(pc|owerpc)(|64)', a): return 'powerpc'
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elif re.match('sh(3|4)$', a): return 'sh'
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elif re.match('bfin', a): return 'blackfin'
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elif re.match('microblazeel', a): return 'microblaze'
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elif a in valid_archs: return a
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else:
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bb.error("cannot map '%s' to a linux kernel architecture" % a)
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export ARCH = "${@map_kernel_arch(d.getVar('TARGET_ARCH', True), d)}"
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def map_uboot_arch(a, d):
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import re
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if re.match('p(pc|owerpc)(|64)', a): return 'ppc'
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elif re.match('i.86$', a): return 'x86'
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return a
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export UBOOT_ARCH = "${@map_uboot_arch(d.getVar('ARCH', True), d)}"
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# Set TARGET_??_KERNEL_ARCH in the machine .conf to set architecture
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# specific options necessary for building the kernel and modules.
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TARGET_CC_KERNEL_ARCH ?= ""
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HOST_CC_KERNEL_ARCH ?= "${TARGET_CC_KERNEL_ARCH}"
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TARGET_LD_KERNEL_ARCH ?= ""
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HOST_LD_KERNEL_ARCH ?= "${TARGET_LD_KERNEL_ARCH}"
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TARGET_AR_KERNEL_ARCH ?= ""
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HOST_AR_KERNEL_ARCH ?= "${TARGET_AR_KERNEL_ARCH}"
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KERNEL_CC = "${CC} ${HOST_CC_KERNEL_ARCH}"
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KERNEL_LD = "${LD} ${HOST_LD_KERNEL_ARCH}"
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KERNEL_AR = "${AR} ${HOST_AR_KERNEL_ARCH}"
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