tce-load -i compiletc cmake gtk3-dev libxslt-dev webkitgtk4-dev gettext guile-dev libofx-dev perl5 boost-1.74-dev googletest-dev bash swig

wget https://github.com/Gnucash/gnucash/releases/download/4.2/gnucash-4.2.tar.bz2

cd gnucash-4.2

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-mtune=generic -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-mtune=generic -Os -pipe" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -Wno-dev -DSYSCONFDIR=/usr/local/etc -DWITH_AQBANKING=OFF -DGTEST_INCLUDE_DIR=/usr/local/include/gtest -DWITH_SQL=OFF -DLIBDIR=lib -DCMAKE_INSTALL_LIBDIR=lib ../

[-flto, -fno-exceptions fail]

make [7m 2.39s]
sudo make install