CMAKE cannot find ftxui installed via AUR?

[peperonnii]

I am pretty new to c++ and im trying to follow https://arthursonzogni.github.io/FTXUI/index.html#build-cmake-find-package this tutorial but i cant get passed the cmake bit.

I have installed ftxui through the AUR and heres my setup

application/
---- src/
-------- main.cpp (with the code in the introduction)
---- build/

I paste CMakeLists.txt

cmake_minimum_required (VERSION 3.11)
find_package(ftxui 5 REQUIRED)
project(ftxui-starter LANGUAGES CXX VERSION 1.0.0)
add_executable(ftxui-starter src/main.cpp)
target_link_libraries(ftxui-starter
  PRIVATE ftxui::screen
  PRIVATE ftxui::dom
  PRIVATE ftxui::component # Not needed for this example.
)

then i do

mkdir build && cd build
cmake ..
make
./main

and then i get this cmake error

CMake Error at /usr/share/cmake/Modules/FindThreads.cmake:66 (message):
  FindThreads only works if either C or CXX language is enabled
Call Stack (most recent call first):
  /usr/share/cmake/Modules/CMakeFindDependencyMacro.cmake:76 (find_package)
  /usr/lib/cmake/ftxui/ftxui-config.cmake:38 (find_dependency)
  CMakeLists.txt:2 (find_package)

Can it not find the package?

[peperonnii]

CMakeLists.txt
cmake_minimum_required (VERSION 3.11)
 
include(FetchContent)
set(FETCHCONTENT_UPDATES_DISCONNECTED TRUE)
FetchContent_Declare(ftxui
  GIT_REPOSITORY https://github.com/ArthurSonzogni/ftxui
  GIT_TAG main # Important: Specify a version or a commit hash here.
)
FetchContent_MakeAvailable(ftxui)
 
project(ftxui-starter LANGUAGES CXX VERSION 1.0.0)
add_executable(ftxui-starter src/main.cpp)
target_link_libraries(ftxui-starter
  PRIVATE ftxui::screen
  PRIVATE ftxui::dom
  PRIVATE ftxui::component # Not needed for this example.
)

Okay i tried it with fetch content and it built no issues.

The problem is with the installation of the ftxui package. i have it installed for sure, im not sure why cmake doesnt find it.

Any ideas?

[ArthurSonzogni]

The error:

  FindThreads only works if either C or CXX language is enabled

Means you need to declare the language of your project.

This means you need to swap the order of the lines:

find_package(ftxui 5 REQUIRED)
project(ftxui-starter LANGUAGES CXX VERSION 1.0.0)

[peperonnii]

thanks a lot for the help, ill try that next time.