matplotplusplus: cimg_display error when compiling from source

Hi, Thank you for sharing this great project. I am attempting to compile matplot++ from source, however, I have faced some error as follows clang: error: no such file or directory: 'cimg_display=0'

Operating System: Ubuntu 18.04 CMake Version: 3.18 Clang: clang++10 The following is CMake terminal output.

CMAKE_MODULE_PATH=/home/user/develop/libraries/matplotplusplus/cmake
-- CPM: adding package nodesoup@0.1 (4bcd8cd2d6c963ccf053f8c19dbb63c065467527)
-- CPM: adding package cimg@0.221 (v.221)
JPEG Found
TIFF Found
ZLIB Found
PNG Found
-- A library with LAPACK API found.
LAPACK Found
BLAS Found
FFTW Found
OPENEXR Found
-- Checking for module 'Magick++'
--   Found Magick++, version 6.9.7
MAGICK Found
-- CPM: adding package glad@0.1.33 (df8e9e16110b305479a875399cee13daa0ccadd9)
-- CPM: adding package glfw@3.3.2 (3.3.2)
-- Using X11 for window creation
-- Configuring done
-- Generating done
-- Build files have been written to: /home/user/develop/libraries/matplotplusplus/build

May I know how can I edit the setting to compile successfully?