Build

Build time switches:

• ENABLE_GAMMA=1 (to enable gamma support)
• ENABLE_DPMS=1 (to enable dpms support)
• ENABLE_DDC=1 (to enable ddcutil support)
• ENABLE_SCREEN=1 (to enable screen emitted backlight computation support, X only)
• ENABLE_YOCTOLIGHT=1 (to enable YoctoLight ALS devices support)

Build deps

• libsystemd >= 221 (systemd/sd-bus.h) or elogind (elogind/sd-bus.h)
• libudev or libeudev (libudev.h)
• libmodule >= 5.0.0 (module/module_easy.h, module/modules_easy.h, module/map.h)
• libjpeg-turbo (jpeglib.h)
• polkit-gobject-1
• dbus-1 (needed to let pkg-config find SESSION_BUS_DIR variable)
• cmake >= 3.5
• gcc or clang
• pkg-config

Needed only if built with gamma support:

• libxrandr (X11/extensions/Xrandr.h)
• libx11 (X11/Xlib.h)
• libwayland (wayland-client.h)
• libdrm (xf86drm.h, xf86drmMode.h)
• wayland-scanner

Needed only if built with dpms support:

• libxext (X11/extensions/Xext.h)
• libx11 (X11/Xlib.h)
• libwayland (wayland-client.h)
• libdrm (xf86drm.h, xf86drmMode.h)
• wayland-scanner

Needed only if built with screen support:

• libx11 (X11/Xlib.h)
• libwayland (wayland-client.h)
• wayland-scanner

Needed only if built with ddcutil support:

• ddcutil >= 0.9.5 (ddcutil_c_api.h)

Needed only if built with Yoctolight sensor support:

• libusb (libusb.h)

Runtime deps:

• shared objects from build libraries
• polkit

Build instructions:

Install needed dependencies;
On Debian based distros:

$ sudo apt install build-essential pkg-config cmake libsystemd-dev libxrandr-dev libxext-dev policykit-1 libpolkit-gobject-1-dev libjpeg-dev libusb-dev libwayland-dev libdrm-dev libddcutil-dev libdbus-1-dev libudev-dev

If libddcutil-dev is missing, you need to manually build and install it from source to support external monitors.

On Fedora:

$ sudo dnf install @development-tools cmake systemd-devel libXrandr-devel libXext-devel polkit-devel libjpeg-turbo-devel libusb-devel wayland-devel libdrm-devel ddcutil-lib dbus-devel

On OpenSuse:

$ sudo zypper install --type pattern devel_basis
$ sudo zypper install cmake systemd-devel libXrandr-devel libXext-devel polkit-devel libjpeg-turbo-devel libusb-1_0-devel wayland-devel libdrm-devel libddcutil3 dbus-1-devel

If ddcutil-lib is missing, you need to manually build and install it from source to support external monitors.

---

Plus, you have to manually install libmodule and, where missing ddcutil from sources.

Then, to build clightd, you just need to issue a:

$ mkdir build
$ cd build
$ cmake \
    -G "Unix Makefiles" \
    -DCMAKE_INSTALL_PREFIX=/usr \
    -DCMAKE_INSTALL_LIBDIR=lib \
    -DCMAKE_BUILD_TYPE="Release" \
    -DENABLE_DDC=1 -DENABLE_GAMMA=1 -DENABLE_DPMS=1 -DENABLE_SCREEN=1 -DENABLE_YOCTOLIGHT=1 \
    ..
$ make

Installation - Generic OS

# make install

Installation - Red Hat

$ cpack -G RPM

And finally install generated RPM package.

Installation - Debian / Ubuntu

$ cpack -G DEB

And finally install generated DEB package.