tce-load -i compiletc meson gtk4-dev gtk4-gir pcre2-dev.tcz gobject-introspection-dev vala-dev

wget https://download.gnome.org/sources/gtksourceview/5.14/gtksourceview-5.14.1.tar.xz

cd gtksourceview-5.14.1

mkdir build
cd 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 -fno-exceptions -fno-rtti" meson --prefix=/usr/local --localstatedir=/var --buildtype=plain

[flto fails]

ninja [5m 46.19s]
sudo ninja install

gtksourceview 5.14.1

    Documentation  : NO
    Build Testsuite: YES
    Install tests  : NO
    Introspection  : YES
    Vala vapi      : YES

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