Rewrite init app in C, introduce MSL (MOP3 System Library)

make/user.mk

@@ -0,0 +1,26 @@
+cc := clang
+o :=
+c :=
+ldflags := -L ../libmsl/build -l:libmsl.a
+cflags := -isystem ../libmsl
+
+include src.mk
+include app.mk
+include ../generic/flags.mk
+include ../$(platform)/flags.mk
+
+all: $(app)
+
+$(app): $(o)
+	$(cc) -o $@ $(ldflags) -T ../$(platform)/link.ld $^
+
+%.o: %.c
+	$(cc) -c -o $@ $(cflags) $<
+
+%.o: %.S
+	$(cc) -c -o $@ $(cflags) $<
+
+clean:
+	rm -f $(o) $(app)
+
+.PHONY: all clean