For many linux build, use aarch64 instead of arm64 #7147
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NikolajBjorner
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This reverts commit 7694bca.
NikolajBjorner
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I did some research and it seems in modern linux, instead of arm64, it should be aarch64.
Some lookup, I found the following
"AArch64" and "ARM64" refer to the same thing.
AArch64 is the 64-bit state introduced in the Armv8-A architecture. The 32-bit state which is backwards compatible with Armv7-A and previous 32-bit Arm architectures is referred to as AArch32. Therefore the GNU triplet for the 64-bit ISA is aarch64. The Linux kernel community chose to call their port of the kernel to this architecture arm64 rather than aarch64, so that's where some of the arm64 usage comes from.
The Apple-developed backend for AArch64 was called "ARM64" whereas the LLVM community-developed backend was called "AArch64" (as it is the canonical name for the 64-bit ISA). The two were merged in 2014 and the backend now is called "AArch64".
from https://stackoverflow.com/a/47274698