From b63d35d9cf0d13e03ed4582908ce7b66b07dcf9e Mon Sep 17 00:00:00 2001
From: Jcw87 <Jcw87@users.noreply.github.com>
Date: Thu, 26 Jan 2023 21:30:17 -0800
Subject: [PATCH] transform-dep.py: fake the -MP compiler option

---
 tools/transform-dep.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/transform-dep.py b/tools/transform-dep.py
index 5c5f7e7b690..0e2d4d05318 100755
--- a/tools/transform-dep.py
+++ b/tools/transform-dep.py
@@ -50,6 +50,7 @@ def import_d_file(in_file: str) -> str:
         else:
             out_lines.append(line.replace('\\', '/'))
 
+        headers: List[str] = []
         for line in it:
             suffix = ''
             if line.endswith(' \\\n'):
@@ -59,7 +60,10 @@ def import_d_file(in_file: str) -> str:
                 path = line.strip()
 
             path = convert_path(path)
+            headers.append(path)
             out_lines.append(f"\t{path}{suffix}\n")
+        # the metrowerks compiler doesn't support -MP
+        out_lines.extend([f'{header}:\n' for header in headers])
 
     return ''.join(out_lines)