[pletter.cpp](https://www.xl2s.tk/) for GCC

build.md

$ tree
.
├── CMakeLists.txt
├── linux-gcc.patch
└── src
    └── pletter.cpp
$ patch -p1 < linux-gcc.patch
$ mkdir build && cd build
$ cmake ..
$ make
$ ls -laF pletter
-rwxrwxr-x 1 hiromasa hiromasa 28440  4月 20 10:24 pletter*
$ ./pletter

Pletter v0.5c1 - www.xl2s.tk

Usage:
pletter [-s[ave_length]] sourcefile [[offset [length]] [destinationfile]]

CMakeLists.txt

cmake_minimum_required(VERSION 3.10)

project(Pletter)

set(CMAKE_CXX_STANDARD 11)

include_directories(src)

add_executable(pletter src/pletter.cpp)

linux-gcc.patch

diff --git a/src/pletter.cpp b/src/pletter.cpp
index b1cc197..9fa070c 100644
--- a/src/pletter.cpp
+++ b/src/pletter.cpp
@@ -9,6 +9,7 @@
 #include <stdlib.h>
 #include <string>
 #include <iostream>
+#include <cstring>
 using namespace std;
 
 unsigned char *d;