Build chain tweaks and cleanup

Makefile

@@ -3,25 +3,26 @@ $(error BUILDROOT IS NOT SET!)
 endif
 
 TARGET := x86_64-elf
-KERNELMAKE := TARGET=${TARGET} $(MAKE) -C src/kernel
-LIBMAKE := TARGET=${TARGET} $(MAKE) -C src/libmittos
+MAKE.kernel := TARGET=${TARGET} $(MAKE) -C src/kernel
+MAKE.libmittos := TARGET=${TARGET} $(MAKE) -C src/libmittos
 
 DIST := $(BUILDROOT)/mittos.iso
 SYSROOT := $(BUILDROOT)/sysroot
-SYS_ITEMS := $(SYSROOT)/kernel $(SYSROOT)/usr/lib/libc.a $(SYSROOT)/usr/lib/libmittos.a
 
-all: $(SYSROOT)/kernel $(SYS_ITEMS)
+
+all: kernel
+
 
 dist: $(DIST)
-
-$(DIST): $(SYS_ITEMS)
+$(DIST): kernel
 	$(BUILDROOT)/toolchain/setup-grub.sh
 	grub-mkrescue -o $@ $(SYSROOT)
 
+
 kernel: $(SYSROOT)/kernel
-$(SYSROOT)/kernel: $(SYSROOT)/usr/lib/libc.a $(SYSROOT)/usr/lib/libmittos.a FORCE
-ifeq ($(shell make -sqC src/kernel install || echo 1), 1)
-	$(KERNELMAKE) install
+$(SYSROOT)/kernel: musllib libmittos FORCE
+ifeq ($(shell $(MAKE.kernel) -sq install || echo 1), 1)
+	$(MAKE.kernel) install
 endif
 
 musllib: $(SYSROOT)/usr/lib/libc.a
@@ -30,17 +31,18 @@ $(SYSROOT)/usr/lib/libc.a:
 
 libmittos: $(SYSROOT)/usr/lib/libmittos.a
 $(SYSROOT)/usr/lib/libmittos.a: FORCE
-ifeq ($(shell make -sqC src/libmittos install || echo 1), 1)
-	$(LIBMAKE) install
+ifeq ($(shell $(MAKE.libmittos) -sq install || echo 1), 1)
+	$(MAKE.libmittos) install
 endif
 
-.PHONY: all dist sysroot FORCE
 
 clean:
 	rm -rf $(DIST)
-	$(KERNELMAKE) clean
-	$(LIBMAKE) clean
+	$(MAKE.kernel) clean
+	$(MAKE.libmittos) clean
 
 distclean:
 	$(MAKE) clean
-	rm -rf $(SYSROOT)
+	rm -rf $(SYSROOT)
+
+.PHONY: all dist sysroot FORCE