Use latest LLVM for musl builds

closes #829

Author: jjhelmus

pythonbuild/downloads.py

@@ -176,12 +176,6 @@
         "licenses": ["MIT"],
         "license_file": "LICENSE.libxcb.txt",
     },
-    "llvm-14-x86_64-linux": {
-        "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20220508/llvm-14.0.3+20220508-gnu_only-x86_64-unknown-linux-gnu.tar.zst",
-        "size": 158614671,
-        "sha256": "04cb77c660f09df017a57738ae9635ef23a506024789f2f18da1304b45af2023",
-        "version": "14.0.3+20220508",
-    },
     # Remember to update LLVM_URL in src/release.rs whenever upgrading.
     "llvm-21-aarch64-linux": {
         "url": "https://github.com/indygreg/toolchain-tools/releases/download/toolchain-bootstrap%2F20251029/llvm-21.1.4+20251029-gnu_only-aarch64-unknown-linux-gnu.tar.zst",

pythonbuild/utils.py

@@ -475,11 +475,7 @@ def sort_key(v):
 
 def clang_toolchain(host_platform: str, target_triple: str) -> str:
     if host_platform == "linux_x86_64":
-        # musl currently has issues with LLVM 15+.
-        if "musl" in target_triple:
-            return "llvm-14-x86_64-linux"
-        else:
-            return "llvm-21-x86_64-linux"
+        return "llvm-21-x86_64-linux"
     elif host_platform == "linux_aarch64":
         return "llvm-21-aarch64-linux"
     elif host_platform == "macos_arm64":