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

savannahostrowski · web-flow · commit c55cce2e5f2f · 2026-05-04T00:30:24.000Z
GH-146475: Block Apple Clang for building JIT stencils (#149188) (cherry picked from commit c0e0640)
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
@@ -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
@@ -11,7 +11,9 @@
 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")

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Block Apple Clang from being used to build the JIT as it ships without`
	`2`	`+required LLVM tools.`