tce-load -i compiletc popt-dev

cd efivar-37

edit Make.defaults
prefix	?= /usr/local/
libdir	?= $(prefix)/lib/
OPTIMIZE ?= 
CFLAGS	?= $(OPTIMIZE)

make CC="gcc -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe" CXX="g++ -flto -fuse-linker-plugin -march=i486 -mtune=i686 -Os -pipe -fno-exceptions -fno-rtti"

sudo make install