使用-arch，而不是-target。
示例源/命令行/输出：

#include <stdio.h>

int main(void)
{
    printf("Hello world\n");
    return 0;
}

clang -arch x86_64 -masm=intel -S -Wall -O3 -o - t.c

.section    __TEXT,__text,regular,pure_instructions
    .build_version macos, 13, 0 sdk_version 13, 1
    .intel_syntax noprefix
    .globl  _main                           ## -- Begin function main
    .p2align    4, 0x90
_main:                                  ## @main
    .cfi_startproc
## %bb.0:
    push    rbp
    .cfi_def_cfa_offset 16
    .cfi_offset rbp, -16
    mov rbp, rsp
    .cfi_def_cfa_register rbp
    lea rdi, [rip + L_str]
    call    _puts
    xor eax, eax
    pop rbp
    ret
    .cfi_endproc
                                        ## -- End function
    .section    __TEXT,__cstring,cstring_literals
L_str:                                  ## @str
    .asciz  "Hello world"

.subsections_via_symbols

或者，如果你想使用-target，你需要指定一个像x86_64-apple-macos13这样的目标三元组：

clang -target x86_64-apple-macos13 -masm=intel -S -Wall -O3 -o - t.c

如果只指定x86_64，则将其视为x86_64-unknown-unknown。

[Solution]

❯ sudo port install x86_64-elf-gcc

❯ x86_64-elf-gcc -masm=intel -S hello.c

Hello Hackers 🤖 (for decoration purposes only.)

TLDR; I can't execute this code on my arm processor. so no hello world here!!

而且很管用！🎉