(compile -s -O2 -d1 lzma.scm -llzma -j lzma)
(compile -c -O2 -d1 lzma.scm -llzma -unit lzma)
(compile -s -O2 -d1 lzma.import.scm)
;
(install-extension
  'lzma
  '("lzma.o" "lzma.so" "lzma.import.so")
  '((version 1.3)
    (static "lzma.o") ;; for static linking
    (documentation "lzma.html")))