Try adding -lstdc++fs

README.md

@@ -62,6 +62,16 @@ We can also still change the language of the source code (iso markdown). Atleast
 
 For the development environment I'm using VSCodium with `C/C++`, `Cmake` and `Cmake Tools` extensions installed.
 
+## Depedencies
+
+* GCC 9 or higher (GCC 8 should also work)
+* CMake
+* Qt (`qt5-default` package)
+
+For Release packaing:
+
+* CPack
+
 ### GUIs
 
 #### Qt

src/CMakeLists.txt

@@ -5,7 +5,8 @@ set (CMAKE_AUTOUIC ON)
 set (CMAKE_AUTOMOC ON)
 set (CMAKE_AUTORCC ON)
 
-set(CMAKE_CXX_FLAGS "-Wall -Wextra")
+# Also add -lstdc++fs for older GCC compilers 
+set(CMAKE_CXX_FLAGS "-Wall -Wextra -lstdc++fs")
 set(CMAKE_CXX_FLAGS_DEBUG "-g")
 set(CMAKE_CXX_FLAGS_RELEASE "-O3 -DNDEBUG")