04ea3d38dd
Until commit "arch/Config.in.sh: fixup MMU selection" in this series,
SH2A could either be used with BR2_USE_MMU disabled or BR2_USE_MMU
enabled.
The later made absolutely no sense, since SH2A does not have a MMU:
MMU support was introduced starting from SH3 according to
https://en.wikipedia.org/wiki/SuperH#SH-3
Also, since commit 22d5501e03 ("arch:
tidy up binary formats config"), which was merged in Buildroot
2015.05, the architecture tuple used when BR2_sh2a=y and BR2_USE_MMU
disabled is sh2a-buildroot-uclinux-uclibc, and this was already
unsupported back in the days of Buildroot 2015.08 and binutils 2.24,
causing the build to fail with:
*** BFD does not support target sh2a-buildroot-uclinux-uclibc.
just like it fails to build today with recent version of binutils.
So, this has been broken since 2015.08, and nobody complained. SH2A is
seldom used, so it's time to kill it.
It is worth mentioning that there had been an attempt at resurrecting
SH2 support around 2015 (see https://lwn.net/Articles/647636/) as part
of the J2 core. This effort led to the addition of FDPIC support for
SH2A in the musl C library (and therefore proper ELF binaries, with
shared libraries), but that was never supported in Buildroot. Now that
the J2 project is essentially dead, there is no reason to bother with
this.
Fixes:
http://autobuild.buildroot.net/results/63d01d33ae30f86b63b9f42a9fea116f2f3e9005/
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>
118 lines
4.3 KiB
Plaintext
118 lines
4.3 KiB
Plaintext
# Config entries for internal toolchain backend
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if BR2_TOOLCHAIN_BUILDROOT
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comment "Toolchain Buildroot Options"
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config BR2_TOOLCHAIN_BUILDROOT_VENDOR
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string "custom toolchain vendor name"
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default "buildroot"
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help
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This option allows to customize the "vendor" part of the
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toolchain tuple, where the toolchain tuple has the form
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<arch>-<vendor>-<os>-<libc>. The default value, "buildroot",
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is fine for most cases, except in very specific situations
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where gcc might make different decisions based on the vendor
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part of the tuple. The value "unknown" is not allowed, as the
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cross-compiling toolchain might then be confused with the
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native toolchain when the target and host architecture are
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identical. The value can not be empty either.
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If you're not sure, just leave the default "buildroot" value.
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choice
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prompt "C library"
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default BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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default BR2_TOOLCHAIN_BUILDROOT_GLIBC if BR2_powerpc64
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config BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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bool "uClibc-ng"
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depends on BR2_aarch64 || BR2_aarch64_be || BR2_arcle || BR2_arceb || \
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BR2_arm || BR2_armeb || \
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BR2_i386 || BR2_m68k || BR2_microblaze || \
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BR2_mips || BR2_mipsel || BR2_mips64 || BR2_mips64el || \
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BR2_or1k || BR2_powerpc || BR2_RISCV_64 || \
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BR2_sh4 || BR2_sh4eb || BR2_sparc || BR2_xtensa || \
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BR2_x86_64
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select BR2_TOOLCHAIN_USES_UCLIBC
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help
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This option selects uClibc-ng as the C library for the
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cross-compilation toolchain.
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http://uclibc-ng.org
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config BR2_TOOLCHAIN_BUILDROOT_GLIBC
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bool "glibc"
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depends on BR2_arm || BR2_armeb || BR2_aarch64 || \
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BR2_aarch64_be || BR2_i386 || BR2_mips || \
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BR2_mipsel || BR2_mips64 || BR2_mips64el|| \
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BR2_powerpc || BR2_powerpc64 || BR2_powerpc64le || \
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BR2_riscv || BR2_s390x || BR2_sh || \
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BR2_sparc64 || BR2_x86_64 || BR2_microblaze || \
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BR2_nios2 || (BR2_arc && BR2_ARC_ATOMIC_EXT) || BR2_csky
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depends on BR2_USE_MMU
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depends on !BR2_STATIC_LIBS
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depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
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depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10 || !BR2_powerpc64le
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depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5 || !BR2_MIPS_NAN_2008
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depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_0 || !BR2_RISCV_64
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depends on BR2_TOOLCHAIN_HEADERS_AT_LEAST_5_1 || !BR2_arc
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depends on !BR2_powerpc_SPE
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depends on BR2_RISCV_ISA_RVA || !BR2_riscv
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select BR2_TOOLCHAIN_USES_GLIBC
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help
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This option selects glibc as the C library for the
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cross-compilation toolchain.
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http://www.gnu.org/software/libc/
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comment "glibc needs a toolchain w/ dynamic library, kernel headers >= 3.2"
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depends on BR2_USE_MMU
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depends on BR2_STATIC_LIBS || !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_2
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# glibc >= 2.26 require kernel headers >= 3.10 on powerpc64le.
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comment "glibc on powerpc64le needs a toolchain w/ headers >= 3.10"
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depends on BR2_powerpc64le
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depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_3_10
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# Support for MIPS NAN2008 needs headers >= 4.5
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comment "glibc on MIPS w/ NAN2008 needs a toolchain w/ headers >= 4.5"
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depends on BR2_MIPS_NAN_2008
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depends on !BR2_TOOLCHAIN_HEADERS_AT_LEAST_4_5
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config BR2_TOOLCHAIN_BUILDROOT_MUSL
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bool "musl"
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depends on BR2_aarch64 || BR2_arm || BR2_armeb || BR2_i386 || \
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BR2_microblaze || BR2_mips || BR2_mipsel || BR2_mips64 || \
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BR2_mips64el || BR2_or1k || BR2_powerpc || BR2_powerpc64 || \
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BR2_powerpc64le || BR2_RISCV_64 || BR2_sh || BR2_x86_64
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depends on !BR2_powerpc_SPE # not supported, build breaks
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depends on !(BR2_powerpc64 || BR2_powerpc64le) || BR2_POWERPC_CPU_HAS_ALTIVEC
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# sh2 nommu is supported by musl, but we don't have support
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# for it in Buildroot.
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depends on BR2_USE_MMU
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select BR2_TOOLCHAIN_USES_MUSL
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help
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This option selects musl as the C library for the
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cross-compilation toolchain.
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https://www.musl-libc.org/
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endchoice
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config BR2_TOOLCHAIN_BUILDROOT_LIBC
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string
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default "uclibc" if BR2_TOOLCHAIN_BUILDROOT_UCLIBC
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default "glibc" if BR2_TOOLCHAIN_BUILDROOT_GLIBC
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default "musl" if BR2_TOOLCHAIN_BUILDROOT_MUSL
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source "package/linux-headers/Config.in.host"
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source "package/linux-headers/Config.in"
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source "package/musl/Config.in"
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source "package/uclibc/Config.in"
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source "package/glibc/Config.in"
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source "package/binutils/Config.in.host"
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source "package/gcc/Config.in.host"
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source "package/elf2flt/Config.in.host"
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endif
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