Limit to 3.13 / Linux

Author: zanieb

cpython-unix/build-cpython.sh

@@ -427,7 +427,12 @@ if [ -n "${CPYTHON_OPTIMIZED}" ]; then
 
     # Allow users to enable the experimental JIT on 3.13+
     if [[ -n "${PYTHON_MEETS_MINIMUM_VERSION_3_13}" ]]; then
-        CONFIGURE_FLAGS="${CONFIGURE_FLAGS} --enable-experimental-jit=yes-off"
+
+        # The JIT build is failing on macOS and 3.14+ due to compiler errors
+        # Only enable on Linux / 3.13 until that's fixed upstream
+        if [[ -n "${PYTHON_MEETS_MAXIMUM_VERSION_3_13}" && "${PYBUILD_PLATFORM}" != "macos" ]]; then
+            CONFIGURE_FLAGS="${CONFIGURE_FLAGS} --enable-experimental-jit=yes-off"
+        fi
 
         if [[ -n "${PYTHON_MEETS_MAXIMUM_VERSION_3_13}" ]]; then
             # On 3.13, LLVM 18 is hard-coded into the configure script. Override it to our toolchain