Added human-readable compilation date in usage output.

Remove verbatim unix timestamp compilation date in usage output on release builds.

Fortune for naka's current commit: Blessing − 吉

include/project.h

@@ -2,6 +2,7 @@
 #ifndef _PROJECT_H
 #define _PROJECT_H
 
+#include <time.h>
 #include <limits.h>
 
 #include "macros.h"
@@ -24,7 +25,7 @@
 /// Project license
 #define PROG_LICENSE _PROJECT_LICENSE
 /// Compiled time (UTC unix timestamp)
-#define PROG_COMPILED_TIMESTAMP AS(_PROJECT_COMPILED, u64)
+#define PROG_COMPILED_TIMESTAMP AS(_PROJECT_COMPILED, time_t)
 
 
 // Returns from the program

src/main.c

@@ -3,6 +3,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/mman.h>
+#include <time.h>
 
 #include <ints.h>
 #include <macros.h>
@@ -15,6 +16,21 @@
 #include <map.h>
 #include <comp.h>
 
+static const char* _compdate_readable()
+{
+	static const time_t comp = PROG_COMPILED_TIMESTAMP;
+
+	static _Thread_local char date[40] = {0};
+	debug_assert(sizeof(date) == 40);
+
+	struct tm* time = gmtime(&comp);
+	if(!date[0]) {
+		usize w = strftime(date, sizeof(date), "%Y-%m-%d %H:%M:%S", time);
+		TRACE("size of hr time: %lu / %lu", w, sizeof(date));
+	}
+	return date;
+}
+
 static void pi_print_trace_infos(FILE* out)
 {
 	const char* name;
@@ -42,10 +58,19 @@ void prog_info(FILE* out)
 #ifdef DEBUG
 	" (debug build)"
 #endif
-		"\n written by %s with <3 (compiled at %lu UTC (unix ts))\n  license %s.\n", 
+		"\n written by %s with <3 (compiled at %s UTC." 
+#ifdef DEBUG
+				" %lu uts)" 
+#else
+				")"
+#endif
+				"\n  license %s.\n", 
 			v_ctoss(v_rawtoc(PROG_VERSION)),
 			PROG_AUTHOUR,
+			_compdate_readable(),
+#ifdef DEBUG
 			PROG_COMPILED_TIMESTAMP,
+#endif
 			PROG_LICENSE);
 	fprintf(out, "\nLogging levels: (set with env-var `%s')\n", _TRACE_CONTROL_ENV_NAME);
 	pi_print_trace_infos(out);