Add long arguments with getopt_long().

adapters/standalone.cpp

@@ -24,13 +24,13 @@
 #include <library.hpp>
 #include <network.hpp>
 
-#include <osdialog.h>
-#include <thread>
+#include <getopt.h>
 #include <unistd.h> // for getopt
 #include <signal.h> // for signal
 #if defined ARCH_WIN
 	#include <windows.h> // for CreateMutex
 #endif
+#include <osdialog.h>
 
 #if defined ARCH_MAC
 	#define GLFW_EXPOSE_NATIVE_COCOA
@@ -73,9 +73,20 @@ int main(int argc, char* argv[]) {
 	float screenshotZoom = 1.f;
 
 	// Parse command line arguments
+	static const struct option longOptions[] = {
+		{"safe", no_argument, NULL, 'a'},
+		{"dev", no_argument, NULL, 'd'},
+		{"headless", no_argument, NULL, 'h'},
+		{"screenshot", required_argument, NULL, 't'},
+		{"system", required_argument, NULL, 's'},
+		{"user", required_argument, NULL, 'u'},
+		{"version", no_argument, NULL, 'v'},
+		{NULL, 0, NULL, 0}
+	};
 	int c;
 	opterr = 0;
-	while ((c = getopt(argc, argv, "adht:s:u:p:")) != -1) {
+
+	while ((c = getopt_long(argc, argv, "adht:s:u:vp:", longOptions, NULL)) != -1) {
 		switch (c) {
 			case 'a': {
 				settings::safeMode = true;
@@ -96,6 +107,10 @@ int main(int argc, char* argv[]) {
 			case 'u': {
 				asset::userDir = optarg;
 			} break;
+			case 'v': {
+				std::fprintf(stderr, "%s %s %s %s\n", APP_NAME.c_str(), APP_EDITION_NAME.c_str(), APP_VERSION.c_str(), APP_ARCH.c_str());
+				return 0;
+			}
 			// Mac "app translocation" passes a nonsense -psn_... flag, so -p is reserved.
 			case 'p': break;
 			default: break;