Utilitze JS crypto.createUUID() when compiling with Emscripten

[negentropicdev]

Similar to the other platform defines, emscripten provides a mechanism for calling JS APIs from C++ and all modern browsers provide a secure UUID generation method.

I'm current experimenting with this for a cross platform I'm building, one of which is to WASM but I am not a cmake wizard and am just statically including all the necessary crossguid files in my app with crossguid as a submodule. I can get all the includes and everything straightened out but am not sure of the proper way to nest the crossguid build from another cmake project.

[neonsoftware]

Hi @negentropicdev,

[I am just a user]

In standard CMake practice it could be by using CMake's FetchContent, which handles dependent CMake-based libraries available on public git repositories.

Here is a sample micro-project using it. It should compile fine.

main.cpp

#include "crossguid/guid.hpp"
#include <iostream>

int main()
{
    std::cout << "Here is a new GUID : " << xg::newGuid() << std::endl;
    return 0;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.15)
project(mySample)

set(CMAKE_CXX_STANDARD 17)

# Using FetchContent to include crossguid
include(FetchContent)

# indicate crossguid's location and version to use
FetchContent_Declare(
        crossguid
        GIT_REPOSITORY https://github.com/graeme-hill/crossguid.git
        GIT_TAG master)

# making available throughout the project
FetchContent_MakeAvailable(crossguid)

add_executable(sample main.cpp)

# add crossguid as dependency (provides both link and include files)
target_link_libraries(sample PRIVATE crossguid)

NOTE: You will need, in your CMakeLists.txt, all the 4 lines where I have added a comment line. Each of those line is standard and needed (include, FetchContent_Declare, FetchContent_MakeAvailable, target_link_libraries).

Would this help ?

Let me know.

Cheers

[negentropicdev]

I would give that a shot but I'm currently relying on changes I've made to support the additional toolchain that aren't in the public repo right now.