diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..5ed94e2
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,31 @@
+include config.mk
+
+.PHONY: build clean install uninstall masm mld msim
+
+build: masm mld msim
+	./bin/masm/masm -o ./bin/runtime.o ./lib/runtime.asm
+
+clean:
+	rm -fr ./bin
+
+install:
+	install -m 755 -D -t $(PREFIX)/bin ./bin/masm/masm
+	install -m 755 -D -t $(PREFIX)/bin ./bin/mld/mld
+	install -m 755 -D -t $(PREFIX)/bin ./bin/msim/msim
+	install -m 444 -D -t $(PREFIX)/lib/mips ./bin/runtime.o
+
+uninstall:
+	rm $(PREFIX)/bin/masm
+	rm $(PREFIX)/bin/mld
+	rm $(PREFIX)/bin/msim
+	rm $(PREFIX)/lib/mips/runtime.o
+	rmdir $(PREFIX)/lib/mips
+
+masm:
+	make -C ./masm build
+
+mld:
+	make -C ./mld build
+
+msim:
+	make -C ./msim build
diff --git a/compile_flags.txt b/compile_flags.txt
index c36adb4..a3db3de 100644
--- a/compile_flags.txt
+++ b/compile_flags.txt
@@ -5,3 +5,4 @@
 -pedantic
 -Wno-gnu-binary-literal
 -Iinclude
+-DPREFIX=/usr/local
diff --git a/config.mk b/config.mk
index 4586fb9..dcc3bcf 100644
--- a/config.mk
+++ b/config.mk
@@ -8,6 +8,8 @@ CFLAGS += -Wall -Wextra -pedantic
 CFLAGS += -Wno-initializer-overrides
 CFLAGS += -O0 -g
 
+PREFIX=/usr/local
+
 # ======================== CONFIG OPTIONS ==
 #
 # MAX LEX LENGTH
diff --git a/test/masm/test.asm b/test/masm/test.asm
index d70f3e7..b099c2e 100644
--- a/test/masm/test.asm
+++ b/test/masm/test.asm
@@ -18,7 +18,6 @@ null:
 .text
 .align 2
 .globl main
-.globl _start
 
 # init the heap
 heap_init:
@@ -204,7 +203,6 @@ realloc_free:
 	jr	$ra
 
 
-_start:
 main:
 	# push return address
 	addi	$sp, $sp, -4
diff --git a/test/mld/test.o b/test/mld/test.o
index c0a5e03..7cf14c0 100644
Binary files a/test/mld/test.o and b/test/mld/test.o differ
diff --git a/test/msim/test b/test/msim/test
index f81c617..293d241 100644
Binary files a/test/msim/test and b/test/msim/test differ