Free Software Implementations
A GNU version of m4 exists. FreeBSD, NetBSD, and OpenBSD also provide independent implementations of the m4 language. Furthermore, the Heirloom Project Development Tools includes a free version of the m4 language, derived from OpenSolaris.
Read more about this topic: M4 (computer Language)
Famous quotes containing the word free:
“When we our betters see bearing our woes,
We scarcely think our miseries our foes.
Who alone suffers, suffers most i’ the mind,
Leaving free things and happy shows behind.
But then the mind much sufferance doth o’er skip,
When grief hath mates, and bearing fellowship.”
—William Shakespeare (1564–1616)