fno-pic

Author: savannahostrowski

Python/jit.c

@@ -217,11 +217,9 @@ patch_32r(unsigned char *location, uint64_t value)
     // Check that we're not out of range of 32 signed bits:
     assert((int64_t)value >= -(1LL << 31));
 #if defined(__APPLE__) && defined(Py_DEBUG)
-    // On macOS debug builds with LLVM 20, external symbols may be out of range.
-    // This is handled by GOT indirection, so we allow the truncation here.
-    // Release builds (-O3) don't have this issue due to better optimization.
+    // LLVM 20 on macOS debug builds: GOT entries may exceed ±2GB PC-relative
+    // range. Truncation is safe as the target is a GOT trampoline.
     if ((int64_t)value >= (1LL << 31)) {
-        // Truncate to 32-bit; the GOT entry will handle the indirection
         value = (uint32_t)value;
     }
 #else

Tools/jit/_targets.py

@@ -585,8 +585,9 @@ def get_target(host: str) -> _COFF32 | _COFF64 | _ELF | _MachO:
     elif re.fullmatch(r"x86_64-apple-darwin.*", host):
         host = "x86_64-apple-darwin"
         condition = "defined(__x86_64__) && defined(__APPLE__)"
+        args = ["-fno-pic"]
         optimizer = _optimizers.OptimizerX86
-        target = _MachO(host, condition, optimizer=optimizer)
+        target = _MachO(host, condition, args=args, optimizer=optimizer)
     elif re.fullmatch(r"x86_64-pc-windows-msvc", host):
         host = "x86_64-pc-windows-msvc"
         condition = "defined(_M_X64)"