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43a4d45f51
This helps in switching toolchains cleanly for kernel build between gcc and clang Currently, some kernels allow building with clang but not all the distro might use clang as default system compiler but kernel may demand gcc which is provided via KERNEL_* variables, however kernel does use OBJCOPY at places during build and it maybe set to use llvm objcopy when using clang. That should be a deliberate setting when clang is used for kernel as well, otherwise it should use binutils provided objcopy (From OE-Core rev: 17b409f2fd97894e0943d13c2cb0d52abde647e3) Signed-off-by: Khem Raj <raj.khem@gmail.com> Cc: Bruce Ashfield <bruce.ashfield@gmail.com> Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
80 lines
3.1 KiB
Plaintext
80 lines
3.1 KiB
Plaintext
#
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# Copyright OpenEmbedded Contributors
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#
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# SPDX-License-Identifier: MIT
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#
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#
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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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loongarch64 \
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microblaze \
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nios2 arc riscv xtensa"
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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').split()
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if re.match('(i.86|athlon|x86.64)$', a): return 'x86'
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elif re.match('arceb$', a): return 'arc'
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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('aarch64_be$', a): return 'arm64'
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elif re.match('aarch64_ilp32$', a): return 'arm64'
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elif re.match('aarch64_be_ilp32$', a): return 'arm64'
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elif re.match('loongarch(32|64|)$', a): return 'loongarch'
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elif re.match('mips(isa|)(32|64|)(r6|)(el|)$', a): return 'mips'
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elif re.match('mcf', a): return 'm68k'
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elif re.match('riscv(32|64|)(eb|)$', a): return 'riscv'
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elif re.match('p(pc|owerpc)(|64)', a): return 'powerpc'
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elif re.match('sh(3|4)$', a): return 'sh'
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elif re.match('bfin', a): return 'blackfin'
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elif re.match('microblazee[bl]', a): return 'microblaze'
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elif a in valid_archs: return a
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else:
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if not d.getVar("TARGET_OS").startswith("linux"):
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return a
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bb.error("cannot map '%s' to a linux kernel architecture" % a)
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export ARCH = "${@map_kernel_arch(d.getVar('TARGET_ARCH'), 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'), 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 ?= "${TARGET_AR_KERNEL_ARCH}"
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TARGET_OBJCOPY_KERNEL_ARCH ?= ""
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HOST_OBJCOPY_KERNEL_ARCH ?= "${TARGET_OBJCOPY_KERNEL_ARCH}"
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KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_KERNEL_ARCH} -fuse-ld=bfd ${DEBUG_PREFIX_MAP} -fdebug-prefix-map=${STAGING_KERNEL_DIR}=${KERNEL_SRC_PATH} -fdebug-prefix-map=${STAGING_KERNEL_BUILDDIR}=${KERNEL_SRC_PATH}"
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KERNEL_LD = "${CCACHE}${HOST_PREFIX}ld.bfd ${HOST_LD_KERNEL_ARCH}"
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KERNEL_AR = "${CCACHE}${HOST_PREFIX}ar ${HOST_AR_KERNEL_ARCH}"
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KERNEL_OBJCOPY = "${CCACHE}${HOST_PREFIX}objcopy ${HOST_OBJCOPY_KERNEL_ARCH}"
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TOOLCHAIN ?= "gcc"
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