tce-load -i compiletc cmake gtk3-dev libxslt-dev webkitgtk-dev webkitgtk4-dev gettext guile-dev libofx-dev perl5 boost-1.65-dev

cd gnucash-3.0

edit common/cmake_modules/GncAddTest.cmake
    PATHS ${GMOCK_ROOT}/include /usr/include /usr/local/include)
  unset(GMOCK_SRC_DIR CACHE)
  FIND_PATH(GMOCK_SRC_DIR src/gmock-all.cc
    PATHS ${GMOCK_ROOT} /usr/src/gmock /usr/src/googletest-release-1.8.0/googlemock)

mkdir build
cd build

cmake -LAH -DCMAKE_C_FLAGS_RELEASE="-mtune=generic -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-mtune=generic -Os -pipe -D_GLIBCXX_USE_C99_MATH" -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 ../

[-flto, -fno-exceptions fail]

make [5m 36.40s]
sudo make install