build: merge everything to a single top-level Makefile

Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>

.gitignore

@@ -1,3 +1,9 @@
+# programs
+rgbasm
+rgbfix
+xlib
+xlink
+
 *.o
 
 # indent backup files

Makefile

@@ -1,11 +1,60 @@
 all:
-	make -C src/asm rgbasm
-	make -C src/lib xlib
-	make -C src/link xlink
-	make -C src/rgbfix rgbfix
+
+rgbasm_obj := \
+	src/asm/alloca.o \
+	src/asm/asmy.o \
+	src/asm/fstack.o \
+	src/asm/globlex.o \
+	src/asm/lexer.o \
+	src/asm/main.o \
+	src/asm/math.o \
+	src/asm/output.o \
+	src/asm/rpn.o \
+	src/asm/symbol.o \
+	src/asm/gameboy/locallex.o
+
+xlib_obj := \
+	src/lib/library.o \
+	src/lib/main.o
+
+xlink_obj := \
+	src/link/assign.o \
+	src/link/library.o \
+	src/link/main.o \
+	src/link/mapfile.o \
+	src/link/object.o \
+	src/link/output.o \
+	src/link/patch.o \
+	src/link/symbol.o
+
+rgbfix_obj := \
+	src/rgbfix/main.o
+
+all: rgbasm xlib xlink rgbfix
 
 clean:
-	make -C src/asm clean
-	make -C src/lib clean
-	make -C src/link clean
-	make -C src/rgbfix clean
+	rm -rf rgbasm $(rgbasm_obj)
+	rm -rf xlib $(xlib_obj)
+	rm -rf xlink $(xlink_obj)
+	rm -rf rgbfix $(rgbfix_obj)
+
+rgbasm: $(rgbasm_obj)
+	gcc -Wall -o $@ $^ -lm
+
+xlib: $(xlib_obj)
+	gcc -Wall -o $@ $^
+
+xlink: $(xlink_obj)
+	gcc -Wall -o $@ $^
+
+rgbfix: $(rgbfix_obj)
+	gcc -Wall -o $@ $^
+
+.c.o:
+	gcc -Wall -DGAMEBOY -Iinclude -Iinclude/asm/gameboy -g -c -o $@ $<
+
+.y.c:
+	bison -d -o $@ $^
+
+src/asm/asmy.y: src/asm/yaccprt1.y src/asm/gameboy/yaccprt2.y src/asm/yaccprt3.y src/asm/gameboy/yaccprt4.y
+	cat $^ > $@

src/asm/.gitignore

@@ -1,5 +1,3 @@
-# executable
-rgbasm
-
+asmy.c
 asmy.h
 asmy.y

src/asm/Makefile

@@ -1,29 +0,0 @@
-obj := \
-	alloca.o \
-	asmy.o \
-	fstack.o \
-	globlex.o \
-	lexer.o \
-	main.o \
-	math.o \
-	output.o \
-	rpn.o \
-	symbol.o \
-	gameboy/locallex.o
-
-all: rgbasm
-
-clean:
-	rm -rf rgbasm $(obj) asmy.y asmy.c asmy.h
-
-rgbasm: $(obj)
-	gcc -Wall -o $@ $^ -lm
-
-.c.o:
-	gcc -Wall -DGAMEBOY -I../../include -Igameboy -g -c -o $@ $<
-
-.y.c:
-	bison -d -o $@ $^
-
-asmy.y: yaccprt1.y gameboy/yaccprt2.y yaccprt3.y gameboy/yaccprt4.y
-	cat $^ > $@

src/lib/.gitignore

@@ -1,2 +0,0 @@
-# executable
-xlib

src/lib/Makefile

@@ -1,12 +0,0 @@
-obj := library.o main.o
-
-all: xlib
-
-clean:
-	rm -rf xlib $(obj)
-
-xlib: $(obj)
-	gcc -Wall -o $@ $^
-
-.c.o:
-	gcc -Wall -I../../include -g -c -o $@ $<

src/link/.gitignore

@@ -1,2 +0,0 @@
-# executable
-xlink

src/link/Makefile

@@ -1,21 +0,0 @@
-obj := \
-	assign.o \
-	library.o \
-	main.o \
-	mapfile.o \
-	object.o \
-	output.o \
-	patch.o \
-	symbol.o
-
-all: xlink
-
-clean:
-	rm -rf xlink $(obj)
-
-xlink: $(obj)
-	gcc -Wall -o $@ $^
-
-.c.o:
-	gcc -Wall -I../../include -g -c -o $@ $<
-

src/rgbfix/.gitignore

@@ -1,2 +0,0 @@
-# executable
-rgbfix

src/rgbfix/Makefile

@@ -1,13 +0,0 @@
-obj := \
-	main.o
-
-all: rgbfix
-
-clean:
-	rm -rf rgbfix $(obj)
-
-rgbfix: $(obj)
-	gcc -Wall -o $@ $^
-
-.c.o:
-	gcc -Wall -I../../include -g -c -o $@ $<