tce-load -i compiletc intltool libsoup-dev enchant-dev iso-codes gtksourceview-dev libpeas-dev gsettings-desktop-schemas-dev itstool vala-dev gtksourceview-gir

cd gedit-3.28.1

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 --libexecdir=/usr/local/lib/gedit --disable-spell

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

make
sudo make install

Configuration:

        Source code location:   .
        Compiler:               gcc -flto -fuse-linker-plugin -mtune=generic -Os -pipe
        Spell Plugin enabled:   no
        Gvfs metadata enabled:  yes
        Deprecations enabled:   
        GObject Introspection:  yes
        GDK Backend:            x11
        Python support:         no
        Vala support:           yes