chore: added makefile

.gitignore

@@ -0,0 +1,2 @@
+build/
+compile_commands.json

Makefile

@@ -0,0 +1,41 @@
+LIB_FILENAME ?= libvieter.a
+
+BUILD_DIR ?= build
+SRC_DIR ?= src
+INC_DIRS ?= include
+
+SRCS != find '$(SRC_DIR)' -iname '*.c'
+OBJS := $(SRCS:%=$(BUILD_DIR)/%.o)
+DEPS := $(SRCS:%=$(BUILD_DIR)/%.d)
+
+INC_FLAGS := $(addprefix -I,$(INC_DIRS))
+
+# -MMD: generate a .d file for every source file. This file can be imported by
+#  make and makes make aware that a header file has been changed, ensuring an
+#  object file is also recompiled if only a header is changed.
+# -MP: generate a dummy target for every header file (according to the  docs it
+#  prevents some errors when removing header files)
+CFLAGS ?= $(INC_FLAGS) -O3 -MMD -MP -Wall -Werror -Wextra
+
+.PHONY: all
+all: vieter
+
+
+# =====COMPILATION=====
+.PHONY: vieter
+vieter: $(BUILD_DIR)/$(LIB_FILENAME)
+$(BUILD_DIR)/$(LIB_FILENAME): $(OBJS)
+	ar -rcs $@ $(OBJS)
+
+$(BUILD_DIR)/%.c.o: %.c
+	mkdir -p $(dir $@)
+	$(CC) $(CFLAGS) -c $< -o $@
+
+
+.PHONY: clean
+clean:
+	rm -rf $(BUILD_DIR)
+
+
+# Make make aware of the .d files
+-include $(DEPS)

src/cron/expression.c

@@ -1,4 +1,4 @@
-#include "expression.h"
+#include "vieter_cron.h"
 #include <time.h>
 
 const uint8_t month_days[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

src/cron/parse.c

@@ -1,4 +1,4 @@
-#include "expression.h"
+#include "vieter_cron.h"
 
 // This prefix is needed to properly compile
 const uint8_t parse_month_days[] = {31, 28, 31, 30, 31, 30,