tce-load -i compiletc cmake libgcrypt-dev qt-5.x-dev

http://tinycorelinux.net/11.x/x86_64/tcz/src/keepassx/keepassx-master-commit_1682ab9.zip

cd keepassx-master

mkdir build
cd build

cmake -DCMAKE_C_FLAGS_RELEASE="-flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe" -DCMAKE_CXX_FLAGS_RELEASE="-flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe -fno-exceptions -fno-rtti" -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_VERBOSE_MAKEFILE=TRUE -DWITH_GUI_TESTS=ON -DWITH_CXX11=ON ../

make [4m 40.81s]
sudo make install