eeace1cc13
In the face of the vast amount of x86-64 CPU architecture variants, Linux distributions have worked together to define "micro-architecture levels" in the x86-64 psABI, called x86-64-v2, x86-64-v3 and x86-64-v4. They standardize a set of CPU features, and GCC since its version 11.x has support for these micro-architecture levels as -march= options. It makes sense to support them in Buildroot, especially for those who want to build toolchains that aim at targeting a reasonably broad family of x86-64 processors. It only really makes sense to use as 64-bit CPUs, and not as 32-bit ones, so we guard them behind BR2_x86_64. More details: https://gitlab.com/x86-psABIs/x86-64-ABI/-/blob/master/x86-64-ABI/low-level-sys-info.tex https://developers.redhat.com/blog/2021/01/05/building-red-hat-enterprise-linux-9-for-the-x86-64-v2-microarchitecture-level https://www.phoronix.com/scan.php?page=news_item&px=GCC-11-x86-64-Feature-Levels https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=59482fa1e7243bd905c7e27c92ae2b89c79fff87 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> [yann.morin.1998@free.fr: - they are x86-64-only CPUs - add gcc commit URL ] Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> |
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| .. | ||
| arch.mk | ||
| arch.mk.arc | ||
| arch.mk.csky | ||
| arch.mk.riscv | ||
| arch.mk.xtensa | ||
| Config.in | ||
| Config.in.arc | ||
| Config.in.arm | ||
| Config.in.csky | ||
| Config.in.m68k | ||
| Config.in.microblaze | ||
| Config.in.mips | ||
| Config.in.nds32 | ||
| Config.in.nios2 | ||
| Config.in.or1k | ||
| Config.in.powerpc | ||
| Config.in.riscv | ||
| Config.in.s390x | ||
| Config.in.sh | ||
| Config.in.sparc | ||
| Config.in.x86 | ||
| Config.in.xtensa | ||