tce-load -i compiletc yasm wxwidgets-dev fuse

cd VeraCrypt/src

edit Makefile
export CC ?= gcc -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe
export CXX ?= g++ -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe

[-fno-exceptions fails]

find . -name Makefile -type f -exec sed -i 's/-O2//g' {} \;

make [NOGUI=1]
sudo make install