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

wget https://download.gnome.org/sources/gtkmm/3.24/gtkmm-3.24.9.tar.xz

cd gtkmm-3.24.9

mkdir gtkmm3-build
cd gtkmm3-build

CC="gcc -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" CXX="g++ -flto -march=armv8-a+crc -mtune=cortex-a72 -Os -pipe" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain -Dbuild-demos=false -Dbuild-tests=false

ninja [15m 45.88s]
sudo ninja install

gtkmm 3.24.9

         Maintainer mode: if-git-build (false)
       Compiler warnings: min (warning_level: 1, werror: false)
    Build deprecated API: true
         Build atkmm API: true
           Build X11 API: if-enabled-in-gdk (true)
Build HTML documentation: if-maintainer-mode (false)
     Build demo programs: false
     Build test programs: false
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
------
Build targets in project: 22

gtkmm 3.24.9

  User defined options
    buildtype    : plain
    localstatedir: /var
    prefix       : /usr/local
    build-demos  : false
    build-tests  : false