openfirmware: fix jamfiles

Without the MultiArchDirSetup, these would not use the boot cflags, and
end up being compiled position-independant. Of course, the a.out format
does not allow relocations, so this could not work.

Change-Id: I6bb570e545f1533200511e6881f71feedb77025b
Reviewed-on: https://review.haiku-os.org/c/1481
Reviewed-by: waddlesplash <[email protected]>

src/system/boot/platform/openfirmware/arch/ppc/Jamfile

@@ -8,14 +8,20 @@ UsePrivateHeaders kernel [ FDirName kernel arch $(TARGET_KERNEL_ARCH) ]
 
 SubDirC++Flags -fno-rtti ;
 
-BootStaticLibrary boot_platform_openfirmware_ppc.o :
-	arch_mmu.cpp
-	arch_cpu_asm.S
-	arch_start_kernel.S
-	cpu.cpp
-	mmu.cpp
-	start.cpp
-;
+local platform ;
+for platform in [ MultiBootSubDirSetup openfirmware ] {
+	on $(platform) {
+
+		BootMergeObject boot_platform_openfirmware_ppc.o :
+			arch_mmu.cpp
+			arch_cpu_asm.S
+			arch_start_kernel.S
+			cpu.cpp
+			mmu.cpp
+			start.cpp
+		;
+		SEARCH on [ FGristFiles arch_cpu_asm.S arch_mmu.cpp ]
+    		= [ FDirName $(HAIKU_TOP) src system kernel arch $(TARGET_KERNEL_ARCH) ] ;
+	}
+}
 
-SEARCH on [ FGristFiles arch_cpu_asm.S arch_mmu.cpp ]
-    = [ FDirName $(HAIKU_TOP) src system kernel arch $(TARGET_KERNEL_ARCH) ] ;

src/system/boot/platform/openfirmware/arch/sparc/Jamfile

@@ -8,12 +8,18 @@ UsePrivateHeaders kernel [ FDirName kernel arch $(TARGET_KERNEL_ARCH) ]
 
 SubDirC++Flags -fno-rtti ;
 
-BootMergeObject boot_platform_openfirmware_sparc.o :
-	arch_start_kernel.S
-	cpu.cpp
-	mmu.cpp
-	start.cpp
-;
+local platform ;
+for platform in [ MultiBootSubDirSetup openfirmware ] {
+	on $(platform) {
 
-SEARCH on [ FGristFiles arch_cpu_asm.S arch_mmu.cpp ]
-    = [ FDirName $(HAIKU_TOP) src system kernel arch $(TARGET_KERNEL_ARCH) ] ;
+		BootMergeObject boot_platform_openfirmware_sparc.o :
+			arch_start_kernel.S
+			cpu.cpp
+			mmu.cpp
+			start.cpp
+		;
+
+		SEARCH on [ FGristFiles arch_cpu_asm.S arch_mmu.cpp ]
+		    = [ FDirName $(HAIKU_TOP) src system kernel arch $(TARGET_KERNEL_ARCH) ] ;
+	}
+}