tce-load -i compiletc gedit-dev intltool itstool vala-dev vte-gir py3.6gobject gucharmap-gir dbus-python3.6 libgit2-glib-gir

cd gedit-plugins-3.22.0

CC="gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" ./configure --prefix=/usr/local --disable-static --localstatedir=/var

find . -name Makefile -type f -exec sed -i 's/-g -O2//g' {} \;

make
make install

activate libgit2 plugin
...
Traceback (most recent call last):
  File "/usr/local/lib/gedit/plugins/git/windowactivatable.py", line 189, in do_deactivate
    self.refresh()
  File "/usr/local/lib/gedit/plugins/git/windowactivatable.py", line 193, in refresh
    self.bus.send('/plugins/filebrowser', 'refresh')
AttributeError: 'MessageBus' object has no attribute 'send'

Configuration:

        Source code location:   .
        Compiler:               gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe
        Prefix:                 /usr/local
        Python Plugins Support: yes
        Vala Plugins Support:   yes

        Plugins:
          bookmarks drawspaces wordcompletion bracketcompletion codecomment colorpicker colorschemer commander joinlines multiedit smartspaces textsize synctex terminal charmap git findinfiles

        Disabled plugins:
           zeitgeist dashboard (Zeitgeist disabled)