Fix pedantic mesonery

meson.build

@@ -9,6 +9,14 @@ project(
   ],
 )
 
+add_project_arguments(
+  [
+    '-D_DEFAULT_SOURCE',
+    '-D_POSIX_C_SOURCE=200809L',
+  ],
+  language: 'c',
+)
+
 r_util_dep = dependency('r_util')
 
 conf = configuration_data()

src/lib/paths.c

@@ -3,6 +3,7 @@
 #define R_LOG_ORIGIN "r2unity.paths"
 
 #include "lib.h"
+#include <strings.h>
 #include <r_util.h>
 
 static bool str_ieq(const char *a, const char *b) {

src/main.c

@@ -589,7 +589,9 @@ static bool find_method_pointers_fast(R2UnityMetadata *meta, const char *path, u
 	ut8 magic[4] = { 0 };
 	FILE *fp = fopen (path, "rb");
 	if (fp) {
-		(void)fread (magic, 1, 4, fp);
+		if (fread (magic, 1, sizeof (magic), fp) != sizeof (magic)) {
+			memset (magic, 0, sizeof (magic));
+		}
 		fclose (fp);
 	}
 	if (!memcmp (magic, "\x7f"