From: Savannah Ostrowski <savannah@python.org>
Date: Mon, 4 May 2026 00:30:24 +0000 (-0700)
Subject: [3.14] GH-146475: Block Apple Clang for building JIT stencils (#149188) (#149339)
X-Git-Tag: v3.14.5rc1~7
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=c55cce2e5f2f30fa54c616395360ac2e1f9d5d5f;p=thirdparty%2FPython%2Fcpython.git

[3.14] GH-146475: Block Apple Clang for building JIT stencils (#149188) (#149339)

GH-146475: Block Apple Clang for building JIT stencils (#149188)

(cherry picked from commit c0e064003954142b4ba820dfe149f893227c4f11)
---

diff --git a/Misc/NEWS.d/next/Build/2026-04-30-08-43-47.gh-issue-146475.1cL4hX.rst b/Misc/NEWS.d/next/Build/2026-04-30-08-43-47.gh-issue-146475.1cL4hX.rst
new file mode 100644
index 000000000000..225c659393fa
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2026-04-30-08-43-47.gh-issue-146475.1cL4hX.rst
@@ -0,0 +1,2 @@
+Block Apple Clang from being used to build the JIT as it ships without
+required LLVM tools.
diff --git a/Tools/jit/_llvm.py b/Tools/jit/_llvm.py
index f09a8404871b..79b6b7ec5300 100644
--- a/Tools/jit/_llvm.py
+++ b/Tools/jit/_llvm.py
@@ -11,7 +11,9 @@ import typing
 import _targets
 
 _LLVM_VERSION = 19
-_LLVM_VERSION_PATTERN = re.compile(rf"version\s+{_LLVM_VERSION}\.\d+\.\d+\S*\s+")
+_LLVM_VERSION_PATTERN = re.compile(
+    rf"(?<!Apple )(LLVM|clang) version\s+{_LLVM_VERSION}\.\d+\.\d+\S*\s+"
+)
 _EXTERNALS_LLVM_TAG = "llvm-19.1.7.0"
 
 _P = typing.ParamSpec("_P")