Split framebuffer functions into library

Makefile

@@ -4,12 +4,13 @@ endif
 
 TARGET := x86_64-elf
 KERNELMAKE := TARGET=${TARGET} $(MAKE) -C src/kernel
+LIBMAKE := TARGET=${TARGET} $(MAKE) -C src/libmittos
 
 DIST := $(BUILDROOT)/mittos.iso
 SYSROOT := $(BUILDROOT)/sysroot
-SYS_ITEMS := $(SYSROOT)/kernel $(SYSROOT)/usr/lib/libc.a
+SYS_ITEMS := $(SYSROOT)/kernel $(SYSROOT)/usr/lib/libc.a $(SYSROOT)/usr/lib/libmittos.a
 
-all: $(SYSROOT)/kernel
+all: $(SYSROOT)/kernel $(SYS_ITEMS)
 
 dist: $(DIST)
 
@@ -17,19 +18,28 @@ $(DIST): $(SYS_ITEMS)
 	$(BUILDROOT)/toolchain/setup-grub.sh
 	grub-mkrescue -o $@ $(SYSROOT)
 
-$(SYSROOT)/kernel: $(SYSROOT)/usr/lib/libc.a FORCE
-ifeq ($(shell make -sqC src/kernel || echo 1), 1)
+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
 endif
 
+musllib: $(SYSROOT)/usr/lib/libc.a
 $(SYSROOT)/usr/lib/libc.a:
 	toolchain/build-musl.sh
 
+libmittos: $(SYSROOT)/usr/lib/libmittos.a
+$(SYSROOT)/usr/lib/libmittos.a: FORCE
+ifeq ($(shell make -sqC src/libmittos install || echo 1), 1)
+	$(LIBMAKE) install
+endif
+
 .PHONY: all dist sysroot FORCE
 
 clean:
 	rm -rf $(DIST)
 	$(KERNELMAKE) clean
+	$(LIBMAKE) clean
 
 distclean:
 	$(MAKE) clean