jp: fix linking on macOS (#38353)

* jp: fix linking on macOS

* mv to root

SConstruct

@@ -166,6 +166,11 @@ env = Environment(
   tools=["default", "cython", "compilation_db", "rednose_filter"],
   toolpath=["#site_scons/site_tools", "#rednose_repo/site_scons/site_tools"],
 )
+# SCons' Darwin linker tool doesn't define the variables used to expand RPATH.
+if arch == "Darwin":
+  env["RPATHPREFIX"] = "-Wl,-rpath,"
+  env["RPATHSUFFIX"] = ""
+  env["_RPATH"] = "${_concat(RPATHPREFIX, RPATH, RPATHSUFFIX, __env__)}"
 if arch != "larch64":
   env['_LIBFLAGS'] = _libflags
 

openpilot/tools/jotpluggler/test_jotpluggler.py

@@ -0,0 +1,11 @@
+import subprocess
+from pathlib import Path
+
+
+JOTPLUGGLER_DIR = Path(__file__).parent
+
+
+def test_help():
+  result = subprocess.run(["./jotpluggler", "-h"], cwd=JOTPLUGGLER_DIR, capture_output=True, text=True)
+  assert result.returncode == 0, result.stderr
+  assert "Usage:" in result.stderr