OpenDuet: Avoid building non-required boot sector files

Saves only a minimal amount of time, but avoids building e.g. unused StartX64
with default PAGE_TABLE location in IA32.

Legacy/BootSector/Makefile

@@ -10,6 +10,10 @@ PRODUCTS64=$(BINDIR)/StartX64_$(PAGE_TABLE).com $(BINDIR)/StartX64_$(PAGE_TABLE_
 
 all: $(PRODUCTS32) $(PRODUCTS64)
 
+IA32: $(PRODUCTS32)
+
+X64: $(PRODUCTS64)
+
 clean:
 	$(RM) -f $(BINDIR)/*.com
 

build_duet.tool

@@ -77,7 +77,7 @@ imgbuild() {
   # Build bootsectors.
   mkdir -p "${BOOTSECTORS}" || exit 1
   cd "${BOOTSECTORS}"/.. || exit 1
-  make || exit 1
+  make "${arch}" || exit 1
   cd - || exit 1
 
   # Concatenate bootsector into the resulting image.