Silence some warnings.

dep/fatfs/build.py

@@ -15,4 +15,5 @@ clibrary(
         "ffconf.h": "./source/ffconf.h",
         "diskio.h": "./source/diskio.h",
     },
+    cflags=["-Wno-pointer-sign"],
 )

dep/hfsutils/build.py

@@ -22,4 +22,5 @@ clibrary(
         "libhfs.h": "./libhfs/libhfs.h",
         "os.h": "./libhfs/os.h",
     },
+    cflags=["-Wno-pointer-sign"],
 )

dep/libusbp/build.py

@@ -60,7 +60,11 @@ else:
 clibrary(
     name="libusbp",
     srcs=srcs,
-    cflags=["-Idep/libusbp/include", "-Idep/libusbp/src"],
+    cflags=[
+        "-Idep/libusbp/include",
+        "-Idep/libusbp/src",
+        "-Wno-deprecated-declarations",
+    ],
     caller_ldflags=ldflags,
     deps=deps,
     hdrs={