tce-load -i compiletc meson vala-dev libgee-dev gobject-introspection-dev telepathy-glib-dev evolution-data-server-dev intltool libgee-gir evolution-data-server-gir telepathy-glib-gir

wget https://download.gnome.org/sources/folks/0.15/folks-0.15.9.tar.xz

cd folks-0.15.9

mkdir build
cd build

CC="gcc -mtune=generic -Os -pipe" CXX="g++ -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain -Dbluez_backend=false [otherwise needs dbusmock]

ninja [0m 49.51s]
sudo ninja install

[lto causes folks to fail at run time with cannot register existing type 'FolksSmallSet']

folks 0.15.9

  User defined options
    buildtype    : plain
    localstatedir: /var
    prefix       : /usr/local
    bluez_backend: false