title: i want to compile python3.9 with clang. What requirements does Python3.9 have for LLVM and clang versions?
body: <p>i want to compile python3.9 with clang</p>
  <p>What requirements does Python3.9 have for LLVM and clang versions?</p>
  <p>such as :
  llvm &gt;**
  clang &gt;**
  I am searching for a long time on net. But no use.
  very thankful !</p>