Everything about Gnat totally explained
GNAT is the
GNU Ada Compiler based on
GCC. Originally its name was an
acronym that stood for
GNU
NYU
Ada
Translator, but that name no longer applies. The front-end and run-time are written in Ada.
The project started in
1992 when the
United States Air Force awarded the
New York University (NYU) a contract to build an open source compiler for Ada to help with the Ada 9X standardization process. The 3-million-dollar contract required the use of the
GNU GPL for all developments, and assignment of copyright to the
Free Software Foundation. The first official validation of GNAT happened in
1995.
In
1994 and
1996, the original authors of GNAT founded two sister companies, Ada Core Technologies in New York City and ACT-Europe in Paris, to provide continuing development and commercial support of GNAT. Both companies were integrated and renamed to
AdaCore in
2004.
GNAT was initially released separately from the main GCC sources. On
October 2,
2001 the GNAT sources were contributed to the GCC
CVS repository. The last version to be released separately was GNAT 3.15p, based on GCC 2.8.1, on
October 2,
2002. Starting with GCC 3.4, on major platforms the official GCC release is able to pass 100% of the
ACATS Ada tests included in the GCC testsuite. In GCC 4.0, more exotic platforms are also able to pass 100% of ACATS.
The compiler is licensed under the terms of the
GNU General Public License. The run-time
is licensed under either the
GNU General Public License ("GNAT GPL Edition" from AdaCore), or the
GNAT Modified General Public License (GCC, GNAT Pro). It is part of most major GNU/Linux or BSD distributions.
JGNAT is a GNAT version that compiles from the Ada programming language to
Java bytecode, but it hasn't been updated since 2001 (version 1.1p).
Further Information
Get more info on 'Gnat'.
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