Added build dir, and gitignore

.gitignore

@@ -0,0 +1 @@
+build/

Makefile

@@ -1,14 +1,17 @@
-SHELL  := /bin/bash
-CC     := cc
-CFLAGS := -Wall -O2
-TARGET := fa2json
-SRCS   := fs-watcher.c json-writer.c
+SHELL		:= /bin/bash
+CC			:= cc
+MKDIR		:= mkdir
+CFLAGS		:= -Wall -Werror -Os
+BUILD_DIR	:= build
+TARGET		:= $(BUILD_DIR)/fa2json
+SRCS		:= fs-watcher.c json-writer.c
 
 .PHONY: all test dev clean
 
 all: $(TARGET)
 
 $(TARGET): $(SRCS)
+	$(MKDIR) -p $(BUILD_DIR)
 	$(CC) $(CFLAGS) -o $@ $^
 
 test: $(TARGET)
@@ -18,4 +21,4 @@ dev: $(TARGET)
 	node test/dev.mjs $(ARGS)
 
 clean:
-	rm -f $(TARGET)
+	rm -rf $(BUILD_DIR)

fs-watcher.c

@@ -58,7 +58,7 @@ static void handle_events(int fafd, int mount_fd) {
 				clock_gettime(CLOCK_MONOTONIC, &mono);
 				clock_gettime(CLOCK_REALTIME, &wall);
 
-				fprintf(stdout, "{\"ts\": [%i, %i, %i, %i]", wall.tv_sec, wall.tv_nsec, mono.tv_sec, mono.tv_nsec);
+				fprintf(stdout, "{\"ts\": [%li, %li, %li, %li]", wall.tv_sec, wall.tv_nsec, mono.tv_sec, mono.tv_nsec);
 
 				char *ptr = (char *)(metadata + 1);
 				char *end = (char *)metadata + metadata->event_len;
@@ -98,7 +98,7 @@ static void handle_events(int fafd, int mount_fd) {
 				}
 
 				if (entry_index++) { fprintf(stdout, ", "); }
-				fprintf(stdout, ", \"mask\": %i}\n", metadata->mask);
+				fprintf(stdout, ", \"mask\": %lli}\n", metadata->mask);
 
 				metadata = FAN_EVENT_NEXT(metadata, size);
 

test/lib/setup.mjs

@@ -3,7 +3,7 @@ import { mkdtempSync, mkdirSync } from 'node:fs';
 import { tmpdir } from 'node:os';
 import { join } from 'node:path';
 
-const FA2JSON = new URL('../../fa2json', import.meta.url).pathname;
+const FA2JSON = new URL('../../build/fa2json', import.meta.url).pathname;
 
 export async function setup() {
 	// Create image file and format