~ via C v16.0.0-clang 🌸 clang -o cpuid cpuid.c
cpuid.c:7:25: error: invalid output constraint '=a' in asm
    7 |                       : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d)
      |                         ^
cpuid.c:13:25: error: invalid output constraint '=a' in asm
   13 |                       : "=a" (*a), "=b" (*b), "=c" (*c), "=d" (*d)
      |                         ^
2 errors generated.
~ via C v16.0.0-clang took 49ms ✗ ./cpuid
Feature flags from cpuid(1):
EDX: FPU DE TSC CX8 APIC SEP CMOV PAT PSE36 CLFLUSH MMX FXSR SSE SSE2 SS 
ECX: SSE3 PCLMULQDQ DTES64 MONITOR SSSE3 CX16 SSE4_1 SSE4_2 POPCNT AES 
Extended feature flags from cpuid(7, 0):
EBX: 
ECX: 
EDX: 
~ via C v16.0.0-clang took 34ms 🌸