add license to shell

Makefile

@@ -2,46 +2,52 @@
 #
 # SPDX-License-Identifier: GPL-3.0-or-later
 
-# Default FLEX tool
 BINARY = bin/argon
 FLEX_TOOL = flex
 
-CFILES = external/xxhash/xxhash.c external/cwalk/src/cwalk.c external/libdye/src/dye.c external/linenoise/linenoise.c $(shell find src -name '*.c')
+SRC_DIRS = src external/xxhash external/cwalk/src external/libdye/src external/linenoise
+CFILES = $(shell find $(SRC_DIRS) -name '*.c' \
+    ! -path "*/tests/*" \
+    ! -path "*/fuzz/*" \
+    ! -path "*/cli/*" \
+    ! -path "*/example*") \
+ $(LEXER_C)
+OBJDIR = build
+OBJS = $(CFILES:%.c=$(OBJDIR)/%.o)
 
-LEXER_SRC = src/lexer/lex.l
-LEXER_C = src/lexer/lex.yy.c
-LEXER_H = src/lexer/lex.yy.h
-CFLAGS = $(ARCHFLAGS) -lm -lgc -lgmp -Wall -Wextra -Wno-unused-function -Werror=unused-result -Iexternal/cwalk/include -Iexternal/libdye/include
+CFLAGS = $(ARCHFLAGS) -Wall -Wextra -Wno-unused-function -Werror=unused-result \
+         -Iexternal/cwalk/include -Iexternal/libdye/include
 LDFLAGS = -lgc -lgmp -lm
 
 all: $(BINARY)
 
-
+# Rule to build lexer
 $(LEXER_C) $(LEXER_H): $(LEXER_SRC)
 	$(FLEX_TOOL) --header-file=$(LEXER_H) -o $(LEXER_C) $(LEXER_SRC)
 
-$(BINARY): $(CFILES) $(LEXER_C) $(LEXER_H)
-	mkdir -p bin
-	gcc -O3 -o $(BINARY) $(CFILES) $(CFLAGS) ${LDFLAGS} -s
+# Pattern rule for compiling .c -> .o
+$(OBJDIR)/%.o: %.c $(LEXER_C) $(LEXER_H)
+	@mkdir -p $(dir $@)
+	gcc -O3 -c $< -o $@ $(CFLAGS)
 
-native: $(CFILES) $(LEXER_C) $(LEXER_H)
-	mkdir -p bin
-	gcc -O3 -march=native -o $(BINARY) $(CFILES) $(CFLAGS) ${LDFLAGS}
+# Link final binary
+$(BINARY): $(OBJS)
+	@mkdir -p bin
+	gcc -o $@ $^ $(CFLAGS) $(LDFLAGS) -s
 
-debug: $(CFILES) $(LEXER_C) $(LEXER_H)
-	mkdir -p bin
-	gcc -g -O3 -o $(BINARY) $(CFILES) $(CFLAGS)
+native: CFLAGS += -march=native
+native: $(BINARY)
 
-full-debug: $(CFILES) $(LEXER_C) $(LEXER_H)
-	mkdir -p bin
-	gcc -g -O3 -fsanitize=address -fno-omit-frame-pointer -o $(BINARY) $(CFILES) $(CFLAGS) ${LDFLAGS}
+debug: CFLAGS += -g
+debug: $(BINARY)
 
-optimised: $(CFILES) $(LEXER_C) $(LEXER_H)
-	mkdir -p bin
-	gcc -O3 -fprofile-generate -o $(BINARY) $(CFILES) $(CFLAGS) ${LDFLAGS}
+full-debug: CFLAGS += -g -fsanitize=address -fno-omit-frame-pointer
+full-debug: $(BINARY)
+
+optimised: CFLAGS += -fprofile-generate
+optimised: $(BINARY)
 	${BINARY} rand_test.ar
-	gcc -O3 -fprofile-use -o $(BINARY) $(CFILES) $(CFLAGS) ${LDFLAGS}
-	
+	$(MAKE) CFLAGS="$(CFLAGS:-fprofile-generate=-fprofile-use)" $(BINARY)
 
 clean:
 	rm -rf build bin