tce-load -i compiletc meson vala-dev libsoup3-dev libgee-dev gobject-introspection-dev libadwaita-dev gtksourceview5-dev itstool mpc-dev libgee-gir gtk3-gir gettext

wget https://download.gnome.org/sources/gnome-calculator/45/gnome-calculator-45.0.2.tar.xz

cd gnome-calculator-45.0.2

mkdir build
cd build

CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --libexecdir=/usr/local/lib/gnome-calculator --buildtype=plain

ninja [0m 49.58s]
sudo ninja install

runtime dep gsettings-desktop-schemas

gnome-calculator 45.0.2

  User defined options
    buildtype    : plain
    libexecdir   : /usr/local/lib/gnome-calculator
    localstatedir: /var
    prefix       : /usr/local