How do I embed my file into an executable and how do I retrieve my resources from it?

[iamalinaji]

Hi, I hope you are doing well.

What I don't understand is how it's possible to embed arbitrary files into my executable. Would you mind explaining that to me? Of course I followed the exact method that was in the README.md file. However, the size of my executable didn't change no matter how large my resources were.

There is my project structure:

-CMakeLists.txt
-CMakeRC.cmake
-resources/
Photo.jpg

My configuration for CMake:

cmake_minimum_required(VERSION 3.10)


project(AddResource)#========== Global Configurations 
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_VERBOSE_MAKEFILE ON)set(CMAKE_CXX_EXTENSIONS OFF)
include(CMakeRC.cmake)



cmrc_add_resource_library(    app1-resources
ALIAS app1::rc    NAMESPACE app1    resources/archive.zip    resources/photo.jpg )
add_executable(MyExe code.cpp)
target_link_libraries(MyExe app1::rc)

My code is:

#include <stdio.h>
#include <cmrc/cmrc.hpp>

CMRC_DECLARE(app1);

int main()

{

    getchar();

    return 0;

}

[vector-of-bool]

The linker will discard your resources since you are not referring to them in your application. You need to call cmrc::app1::get_filesystem() in your program to gain access to the embedded resources. Check the embedded_filesystem API document in the README file.

[iamalinaji]

Thanks:)
I have one more question and I would really appreciate it if you hint me about it a bit. If I have an exe file for example somefile.exe, how could I retrieve my resources from it?

[vector-of-bool]

The object returned by get_filesystem() encodes the filesystem structure of your original resources. You just need to call open() with the path to the resource.

[iamalinaji]

Thanks:)
So I built an executable with one embedded resource which was a zip file. In another project I tried to read the zip file but unfortunately I got an error...
My code:

#include <cmrc/cmrc.hpp>
#include <iostream>
CMRC_DECLARE(app1);
int main()
{
    auto fs = cmrc::app1::get_filesystem();
    auto archive = fs.open("archive.zip");
    return 0;
}

My CMake Configuration file:

cmake_minimum_required(VERSION 3.10)
project(shelter)
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_VERBOSE_MAKEFILE ON)
set(CMAKE_CXX_EXTENSIONS OFF)
include(CMakeRC.cmake)
cmrc_add_resource_library(
    app1-resources

    ALIAS app1::rc
    NAMESPACE app1
    myprogram.exe 
    )
add_executable(myprogram code.cpp)
target_link_libraries(myprogram PRIVATE app1::rc)

What am I doing wrong ?
Thanks in advance for helping me!

[vector-of-bool]

It appears that you are not embedding the Zip file in your cmrc_add_resource_library call. You are passing myprogram.exe, which is likely not what you want to do.

[iamalinaji]

I think I misunderstood the function of this module, however, thank you for your help!