tce-load -i compiletc meson libsigc++-dev

wget https://download.gnome.org/sources/glibmm/2.66/glibmm-2.66.7.tar.xz

cd glibmm-2.66.7

mkdir bld
cd bld

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-examples=false

ninja [9m 11.45s]
sudo ninja install

glibmm 2.66.7

         Maintainer mode: if-git-build (false)
       Compiler warnings: min (warning_level: 1, werror: false)
    Build deprecated API: true
Build HTML documentation: if-maintainer-mode (false)
  Build example programs: false
Directories:
                  prefix: /usr/local
              includedir: /usr/local/include
        includeglibmmdir: /usr/local/include/glibmm-2.4
         includegiommdir: /usr/local/include/giomm-2.4
                  libdir: /usr/local/lib
         glibmmconfigdir: /usr/local/lib/glibmm-2.4/include
          giommconfigdir: /usr/local/lib/giomm-2.4/include
              gmmprocdir: /usr/local/lib/glibmm-2.4/proc
            pkgconfigdir: /usr/local/lib/pkgconfig
                 datadir: /usr/local/share
                  docdir: /usr/local/share/doc/glibmm-2.4
              devhelpdir: /usr/local/share/devhelp/books/glibmm-2.4
------
Build targets in project: 59

glibmm 2.66.7

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