tce-load -i compiletc git fltk-1.3-dev sstrip

git clone https://github.com/tinycorelinux/fltk_projects

cd fltk_projects/flit

patch -Np0 -i ../../fltk-1.3.2_1.patch

edit Makefile
CXXFLAGS=-flto -fuse-linker-plugin -mtune=generic -Os -pipe -fno-exceptions -fno-rtti

make

sudo ./build-tcz.sh