Replace strcpy with memcpy to fix -O3 build

Makefile

@@ -17,7 +17,8 @@ endif
 CC = $(CROSS_COMPILE)gcc
 LD = $(CC)
 PFLAGS = -g
-#PFLAGS += -O3 -s
+#PFLAGS += -O3
+#PFLAGS += -s
 #PFLAGS += -DDEBUG_MAPPER
 #PFLAGS += -DDEBUG_RENDER
 #PFLAGS += -DDEBUG_PPU -DDEBUG_VRAM -DDEBUG_OAM

src/file.c

@@ -31,7 +31,7 @@ int make_filename(char* filename, int max_len,
 
     // Part 1/4: Leading path
     if (0 == status && orig_path_len <= remain) {
-        strncpy(filename, orig_name, orig_path_len);
+        memcpy(filename, orig_name, orig_path_len);
         remain -= orig_path_len;
         filename += orig_path_len;
     } else {
@@ -42,7 +42,7 @@ int make_filename(char* filename, int max_len,
     if (0 == status && NULL != subdir) {
         int subdir_len = strlen(subdir);
         if ((subdir_len + 1) <= remain) {
-            strncpy(filename, subdir, subdir_len);
+            memcpy(filename, subdir, subdir_len);
             filename += subdir_len;
             *filename++ = '/';
             remain -= (subdir_len + 1);
@@ -53,7 +53,7 @@ int make_filename(char* filename, int max_len,
 
     // Part 3/4: Basename
     if (0 == status && orig_base_len <= remain) {
-        strncpy(filename, orig_name, orig_base_len);
+        memcpy(filename, orig_name, orig_base_len);
         remain -= orig_base_len;
         filename += orig_base_len;
     } else {
@@ -65,7 +65,7 @@ int make_filename(char* filename, int max_len,
         int ext_len = strlen(ext);
         if ((ext_len + 1) <= remain) {
             *filename++ = '.';
-            strncpy(filename, ext, ext_len);
+            memcpy(filename, ext, ext_len);
             remain -= (ext_len + 1);
             filename += ext_len;
         } else {