from
Jargon File (4.4.4, 14 Aug 2003)
toolchain
A collection of tools used to develop for a particular hardware
target, or to work with a particular data format (thus `the Crusoe
development toolchain', or the `DocBook toolchain'). Often used in the
context of building software on one system which will be installed or
run on some other device; in that case the chain of tools usually
consists of such items as a particular version of a compiler,
libraries, special headers, etc. May also be used of text-formatting,
page layout, or multimedia tools which render from some markup to a
variety of production formats. Differs from `toolkit' in that the
former implies a collection of semi-independent tools with
complementary functions, while `toolchain' implies that each of the
parts is a serial stage in a rather tightly bound pipeline. Seems to
have become current in early 1999 and 2000; now common.