tce-load -i git automake libtool-dev intltool gettext-dev compiletc libgee-dev evolution-data-server-dev vala-dev gobject-introspection-dev intltool tracker2-dev readline-dev libgee-gir evolution-data-server-gir vala-dev tracker2-gir

git clone https://gitlab.gnome.org/GNOME/folks

cd folks

./autogen.sh

edit configure
LIBS="-lreadline -lncursesw $LIBS"
LIBREADLINE="-lreadline -lncursesw"

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 --enable-tracker-backend --disable-fatal-warnings

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

make [4m s]
sudo make install

Configure summary:

        Vala........................:  yes
        Vala Compiler...............:  /usr/local/bin/valac
        C Compiler Flags............:  -g -O2  -Werror=implicit -Werror=missing-declarations -Werror=missing-parameter-type -Werror=missing-prototypes -Werror=nested-externs -Werror=old-style-declaration -fdiagnostics-color=auto 
        Linker Flags................:   
        Prefix......................:  /usr/local
        Bugreporting URL............:  https://bugzilla.gnome.org/browse.cgi?product=folks
        Documentation...............:  no
        Import tool.................:  yes
        Inspector tool..............:  yes
        Telepathy backend...........:  yes
        Tracker backend.............:  yes
        Libsocialweb backend........:  no
        E-D-S backend...............:  yes
        Ofono backend...............:  yes
        BlueZ backend...............:  yes
        Zeitgeist support...........:  no
        Build tests.................:  yes
        Install tests...............:  no