From f574b0abe1bd47cd65c7ebaa89a8f4bbec7bbe70 Mon Sep 17 00:00:00 2001
From: Karl-Wilfried Zimmer <zimmerk4@students.uni-marburg.de>
Date: Sun, 31 Dec 2023 15:37:43 +0100
Subject: [PATCH] made project use FetchContent insteaf of relying on
 submodules

---
 CMakeLists.txt     | 13 ++++++++++---
 app/CMakeLists.txt |  2 --
 include/main.h     |  2 +-
 3 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 2b8d89e..1b67fb8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.10)
+cmake_minimum_required(VERSION 3.14)
 
 project(Geometry VERSION 0.1 LANGUAGES CXX)
 
@@ -8,9 +8,16 @@ endif ()
 
 set(CMAKE_CXX_STANDARD 17)
 
-include_directories(${PROJECT_SOURCE_DIR}/include)
+include(FetchContent)
 
-add_subdirectory(lib/eigen)
+FetchContent_Declare(
+        eigen
+        GIT_REPOSITORY https://gitlab.com/libeigen/eigen.git
+        GIT_TAG 3.4.0
+)
+FetchContent_MakeAvailable(eigen)
+
+include_directories(${PROJECT_SOURCE_DIR}/include)
 
 add_subdirectory(src)
 
diff --git a/app/CMakeLists.txt b/app/CMakeLists.txt
index c639e6e..c5a8f51 100644
--- a/app/CMakeLists.txt
+++ b/app/CMakeLists.txt
@@ -1,5 +1,3 @@
 add_executable(Geometry main.cpp)
 
 target_link_libraries(Geometry PUBLIC Eigen3::Eigen)
-
-target_include_directories(Geometry PUBLIC "${PROJECT_BINARY_DIR}" "${PROJECT_SOURCE_DIR}/lib/eigen/Eigen")
diff --git a/include/main.h b/include/main.h
index 74c6840..c9d4a50 100644
--- a/include/main.h
+++ b/include/main.h
@@ -6,7 +6,7 @@
 #define GEOMETRY_MAIN_H
 
 #include <iostream>
-#include <Dense>
+#include <Eigen/Dense>
 
 using namespace std;