tce-load -i compiletc meson atkmm-dev pangomm-dev gtk3-dev

wget https://download.gnome.org/sources/gtkmm/3.24/gtkmm-3.24.4.tar.xz

cd gtkmm-3.24.4

mkdir build-lib
cd build-lib

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -DNDEBUG" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain -Dbuild-documentation=false -Dbuild-examples=false

ninja [5m 11.30s]
sudo ninja install

gtkmm 3.24.4

         Maintainer mode: if-git-build (false)
       Compiler warnings: min
    Build deprecated API: true
         Build atkmm API: true
           Build X11 API: if-enabled-in-gdk (true)
Build HTML documentation: false
     Build demo programs: true
     Build test programs: true
Directories:
                  prefix: /usr/local
              includedir: /usr/local/include
         includegdkmmdir: /usr/local/include/gdkmm-3.0
         includegtkmmdir: /usr/local/include/gtkmm-3.0
                  libdir: /usr/local/lib
          gdkmmconfigdir: /usr/local/lib/gdkmm-3.0/include
          gtkmmconfigdir: /usr/local/lib/gtkmm-3.0/include
                   m4dir: /usr/local/lib/gtkmm-3.0/proc/m4
            pkgconfigdir: /usr/local/lib/pkgconfig
                 datadir: /usr/local/share
                  docdir: /usr/local/share/doc/gtkmm-3.0
              devhelpdir: /usr/local/share/devhelp/books/gtkmm-3.0