Initial implementation of logging library

Signed-off-by: Aidan Hahn <aidan@aidanis.online>

Makefile

@@ -0,0 +1,35 @@
+CC ?= gcc
+CFLAGS = -fPIC -Wall -Wextra -O2 -c
+LDFLAGS = -shared
+BUILD_DIR ?= $(shell pwd)/build
+TARGET_DIR ?= $(shell pwd)/target
+
+ifdef ALOG_HIJACK_PRINTF
+CFLAGS += -DALOG_HIJACK_PRINTF
+endif
+
+ifdef ALOG_DEBUG
+CFLAGS += -g
+endif
+
+OBJ = $(BUILD_DIR)/alog.o
+LIB = $(TARGET_DIR)/alog.so
+
+.PHONY: so
+so: $(if $(shell stat $(LIB)), clean) $(LIB)
+
+$(LIB): $(TARGET_DIR) $(OBJ)
+	$(CC) $(LDFLAGS) -o $(LIB) $(OBJ)
+
+$(OBJ): $(BUILD_DIR)
+	$(CC) $(CFLAGS) alog.c -o $(OBJ)
+
+$(BUILD_DIR):
+	mkdir $(BUILD_DIR)
+
+$(TARGET_DIR):
+	mkdir $(TARGET_DIR)
+
+.PHONY: clean
+clean:
+	rm $(LIB) $(OBJ)