build system refresh

programs/rockterm/makefile

@@ -0,0 +1,29 @@
+CC = i686-elf-gcc
+LD = i686-elf-ld
+
+SYSROOT = ../sysroot
+USR_INCLUDE = $(SYSROOT)/usr/include
+USR_LIB		= $(SYSROOT)/usr/lib
+
+CFLAGS = -ffreestanding -O2 -Wall -Wextra -I$(USR_INCLUDE)
+LDFLAGS = -m elf_i386 -nostdlib
+
+TARGET = rockterm
+
+all: $(TARGET)
+
+crt0.o: crt0.S
+	$(CC) $(CFLAGS) -c crt0.S -o crt0.o
+
+main.o: main.c
+	$(CC) $(CFLAGS) -c main.c -o main.o
+
+$(TARGET): crt0.o main.o $(USR_LIB)/*
+	$(LD) $(LDFLAGS) -T linker.ld crt0.o main.o $(USR_LIB)/* -o $(TARGET)
+	cp $(TARGET) $(SYSROOT)/usr/bin
+
+clean:
+	rm -f *.o $(TARGET) compile_commands.json
+	rm -rf .cache
+
+.PHONY: all clean test