Prepare Library for CMake FetchContent (#217)

* Test for Cmake FetchContent
* Added generalized name for Interface

---------

Co-authored-by: FlorianXXIV <mail@florianxxiv.dev>
Co-authored-by: BoB <bobluppes@gmail.com>

.gitignore

@@ -1,6 +1,7 @@
 build/
 cmake-modules/
 venv
+cmake-build-debug
 
 # IDE
 .vscode/

CMakeLists.txt

@@ -10,6 +10,9 @@ project(Graaf
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
+# The target name of the Library, what name you give to the Interface
+set(GRAAF_LIB_TARGET_NAME ${PROJECT_NAME})
+
 # Example usages of the library
 option(SKIP_EXAMPLES "Skip building the examples" OFF)
 if(NOT SKIP_EXAMPLES)
@@ -29,3 +32,8 @@ if(NOT SKIP_BENCHMARKS)
 add_subdirectory(perf)
 endif()
 
+#Adding Interface to enable use of FetchContent
+add_library(${GRAAF_LIB_TARGET_NAME} INTERFACE)
+add_library(${PROJECT_NAME}::${GRAAF_LIB_TARGET_NAME} ALIAS ${PROJECT_NAME})
+
+target_include_directories(${GRAAF_LIB_TARGET_NAME} INTERFACE "${PROJECT_BINARY_DIR}" "${PROJECT_SOURCE_DIR}/include/")