Use conan to add dependency on CLI11

(Also use some basic CLI11 to verify build/link works.)

CMakeLists.txt

@@ -2,6 +2,10 @@ cmake_minimum_required(VERSION 3.24.2)
 set(CMAKE_CXX_STANDARD 11)
 
 project(cppchallenge)
-set (CMAKE_RUNTIME_OUTPUT_DIRECTORY "build")
+find_package(CLI11 REQUIRED)
+set(BUILD_DIR "build")
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${BUILD_DIR})
+set(CLI11_DIR ${BUILD_DIR})
 file(GLOB SOURCES "src/*.cpp")
-add_executable(cppchallenge ${SOURCES})
+add_executable(${PROJECT_NAME} ${SOURCES})
+target_link_libraries(${PROJECT_NAME} CLI11::CLI11)

CMakeUserPresets.json

@@ -0,0 +1,9 @@
+{
+    "version": 4,
+    "vendor": {
+        "conan": {}
+    },
+    "include": [
+        "/home/ronh/work/cpp-challenge/build/CMakePresets.json"
+    ]
+}

conanfile.txt

@@ -0,0 +1,7 @@
+[requires]
+cli11/2.3.2
+
+[generators]
+CMakeDeps
+CMakeToolchain
+

cppchallenge.cpp

@@ -0,0 +1,11 @@
+#include "CLI/CLI.hpp"
+#include <iostream>
+
+int main(int argc, char *argv[]){
+   CLI::App app{"Just a simple 'hello'"};
+   CLI11_PARSE(app, argc, argv);
+   std::cout << "Hello World!" << std::endl;
+   return 0;
+}
+
+//  vim: set ts=4 expandtab :

src/cppchallenge.cpp

@@ -1,6 +1,9 @@
+#include "CLI/CLI.hpp"
 #include <iostream>
 
 int main(int argc, char *argv[]){
+   CLI::App app{"Just a simple 'hello'"};
+   CLI11_PARSE(app, argc, argv);
    std::cout << "Hello World!" << std::endl;
    return 0;
 }