tce-load -i compiletc meson dbus-glib-dev gnome-desktop-dev json-glib-dev upower-dev xmlto gettext

https://ftp.gnome.org/pub/GNOME/sources/gnome-session/3.36/gnome-session-3.36.0.tar.xz
https://gitweb.gentoo.org/repo/gentoo.git/tree/gnome-base/gnome-session/files/3.30.1-elogind-support.patch

cd gnome-session-3.36.0

patch -Np0 -i ../gnome-session-3.28.1_elogind_meson.patch
patch -Np0 -i ../gnome-session-3.28.1_elogind_gsm-autostart-app.patch
patch -Np1 -i ../gnome-session-3.28.1_elogind_gsm-systemd.c.patch
[patch -Np0 -i ../gnome-session-3.36.0_1.patch
patch -Np0 -i ../gnome-session-3.36.0_2.patch]

mkdir build
cd build

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" meson --prefix=/usr/local --libexecdir=/usr/local/lib/gnome-session --localstatedir=/var --buildtype=plain -Dsystemd_journal=false -Dman=false -Ddocbook=false [-Delogind=true -Dsystemd_session=disable -Dsystemd=false]=with only libelogind mod

ninja[0m 7.16s]
sudo ninja install

gnome-session-binary [30410]: WARNING: Could not get session id for session. Check that logind is properly installed and pam_systemd is getting used at login.
gnome-session-binary [30410]: WARNING: Unable to find required component `org.gnome.SettingsDaemon.UsbProtection`
Unable to init session: Could not connect: connection refused
** (gnome-session-failed: 30436): Warning ** : Could not open display

                gnome-session 3.36.0
                ====================

        prefix:                   /usr/local
        exec_prefix:              /usr/local/lib/gnome-session
        libdir:                   /usr/local/lib
        bindir:                   /usr/local/bin
        sbindir:                  /usr/local/sbin
        sysconfdir:               /usr/local/etc
        localstatedir:            /var
        datadir:                  /usr/local/share
        source code location:     /usr/src/gnome-session-3.36.0
        compiler:                 gcc
        cflags:                   
        Debug mode:               false
        Use *_DISABLE_DEPRECATED: false

        Session tracking:         elogind 
        Build Docbook:            false
        Build manpages:           false