How would I install hpx with CMake alongside my application?

[McKillroy]

I want to install the dependencies of my application alongside the binaries with CMake.
What I'm trying is the CMake command install(IMPORTED_RUNTIME_ARTIFACTS <dependency targets list>).
It works nicely with fmt, mimalloc, lua and others.
HPX however is not added to my target with the usual target_link_libraries but with HPX_SETUP_TARGET.
My attempts to use HPX:hpx or HPX:wrap_main didn't work to get hpx.dll installed.
The HPX::iostreams_component works. Which target could I use to install the hpx main library ?

Example cmake command:

install(IMPORTED_RUNTIME_ARTIFACTS 
    fmt::fmt
    ${LUA_LIBRARIES}        
    mimalloc
    nng::nng
    #HPX::hpx #<-- Doesn't work: .. given target "HPX::hpx" which is not an executable, library, or module.		
    #HPX::wrap_main #<-- Doesn't work either
    HPX::iostreams_component  # <-- Works nicely
) 

[msimberg]

Have you tried not installing HPX explicitly at all? I'm assuming you're using fetchcontent (or similar) in your project, and HPX knows how to install itself (it issues those install commands for itself). I just tried the following minimal example:

cmake_minimum_required(VERSION 3.19)
project(myproject CXX)
include(FetchContent)
fetchcontent_declare(
  HPX
  GIT_REPOSITORY https://github.com/STEllAR-GROUP/hpx.git
  GIT_TAG master
)
fetchcontent_makeavailable(HPX)
add_executable(myexe main.cpp)
target_link_libraries(myexe PRIVATE HPX::hpx)

and building the install target builds and installs HPX.

As a side note, please consider using the CMake targets provided by HPX, not the macros. We're planning to remove the macros sooner or later. HPX::hpx, HPX::wrap_main, HPX::component, and HPX::plugin should cover all the use cases of the macro. If there's something missing that should be considered a bug. See here for more details: https://hpx-docs.stellar-group.org/latest/html/manual/creating_hpx_projects.html#using-cmake-targets.

[McKillroy]

Sorry, I was probably not explicit enough.
I am using vcpkg manifest mode to build my project and resolve all dependencies.
When running CMakes INSTALL(TARGETS ...) my application gets installed, but not the dependencies.
That's why I'm using install(IMPORTED_RUNTIME_ARTIFACTS ... to get the DLLs I need installed.

[msimberg]

Just to add a bit of context from the HPX side, the reason e.g. HPX::hpx and HPX::wrap_main can't be installed like the others is because they are interface targets and so they do not on their own have any imported artifacts, only transitively from other targets; HPX::iostreams_component is a plain SHARED CMake library and can be installed directly.

[McKillroy]

Finally found an experimental feature in vcpkg:
set(X_VCPKG_APPLOCAL_DEPS_INSTALL ON)
Also asked here: [https://github.com/microsoft/vcpkg/discussions/20526]
Also see [https://github.com/microsoft/vcpkg/issues/1653]