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

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

cd fltk_projects

edit Makefile

CXXFLAGS += -Os -s -Wall -Wextra
CXXFLAGS += -mtune=generic # change or comment this out on other arches
CXXFLAGS += -fno-rtti -fno-exceptions
CXXFLAGS += -ffunction-sections -fdata-sections
CXXFLAGS += -flto -fuse-linker-plugin

make
sudo make install