[cannot compile in 4gb ram]

tce-load -i compiletc zip unzip gperf perl_archive_zip automake libtool-dev gtk3-dev gtk2-dev cups-dev curl-dev gst-plugins-base-dev harfbuzz-icu-dev lcms2-dev librsvg-dev libxslt-dev nss-dev poppler21-dev libsane-dev bash tar coreutils dbus-glib-dev wget neon-dev python3.6-dev dconf-dev desktop-file-utils nasm zenity glu-dev libatomic_ops-dev hunspell-dev libxml2-bin apr-dev redland-dev glm-dev serf-dev clucene-dev icu67-bin gettext glibc_apps clang boost-1.74-dev libexttextcat-dev krb5-dev

wget https://download.documentfoundation.org/libreoffice/src/7.2.2/libreoffice-7.2.2.2.tar.xz

cd /usr/local/bin
sudo rm python
sudo ln -s python3.6 python

cd libreoffice-7.2.2.2

sed -e "/gzip -f/d" -e "s|.1.gz|.1|g" -i bin/distro-install-desktop-integration
sed -e "/distro-install-file-lists/d" -i Makefile.in

edit configure
    if test "$gccvisbroken" = "no"; then
        as_fn_error $? "Your gcc is not -fvisibility=hidden safe. This is no longer supported." "$LINENO" 5


PGCONFIG=/usr/local/pgsql13/bin/pg_config CC="gcc -flto -mtune=generic -Os -pipe" CXX="g++ -flto -mtune=generic -Os -pipe -DNDEBUG" ./autogen.sh --prefix=/usr/local --localstatedir=/var --with-lang='fr en-GB' --without-help --without-myspell-dicts --without-junit --without-system-dicts --disable-odk --enable-release-build=yes --enable-python=system --without-java --with-system-apr --with-system-boost --with-system-clucene --with-system-curl --with-system-epoxy --with-system-expat --with-system-glm --with-system-graphite --with-system-icu --with-system-harfbuzz --with-system-jpeg --with-system-lcms2 --with-system-libatomic_ops --with-system-libexttextcat --with-system-libpng --with-system-libxml  --with-system-neon --with-system-nss --with-system-odbc --with-system-openldap --with-system-openssl --with-system-poppler --with-system-postgresql --with-system-redland --with-system-serf --with-system-zlib --with-system-hunspell --with-system-sane --disable-firebird-sdbc --without-fonts

ln -sv src/libreoffice-translations-7.2.2.2/translations/

time make build-nocheck [5h 4m 13s]
sudo make distro-pack-install