Fix UMP logger boot initialization and configurable protocol build

tests/ump_logger/run_init_test.py

@@ -0,0 +1,35 @@
+"""Boot regression independent of the external shared protocol checkout.
+
+Run with GCC in PATH: python tests/ump_logger/run_init_test.py
+The negative control must fail without the boot initialization call.
+"""
+import os
+from pathlib import Path
+import subprocess
+import tempfile
+
+root = Path(__file__).resolve().parents[2]
+source = root / 'tests/ump_logger/init_test.c'
+compiler = os.environ.get('CC', 'gcc')
+with tempfile.TemporaryDirectory(prefix='ump-init-') as directory:
+    directory = Path(directory)
+    text = source.read_text().replace(
+        '../../Source/Internal/log_to_mem.c',
+        (root / 'Source/Internal/log_to_mem.c').as_posix(),
+    )
+    for initialize in (False, True):
+        case = directory / 'init_test.c'
+        case.write_text(text if initialize else text.replace('ump_log_init();', ';'))
+        executable = directory / 'init_test.exe'
+        subprocess.run([
+            compiler, '-Wno-unknown-pragmas', '-Wno-int-to-pointer-cast',
+            '-I' + str(root / 'tests/ump_logger/stubs'),
+            '-I' + str(root / 'Source/Internal/Include'),
+            str(case), '-o', str(executable),
+        ], check=True)
+        result = subprocess.run([str(executable)])
+        if initialize:
+            assert result.returncode == 0, f'Initialization failed: {result.returncode}'
+        else:
+            assert result.returncode != 0, 'Negative control unexpectedly passed'
+        print(f'{"Initialized boot" if initialize else "Dirty RAM negative control"}: PASS')