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Essential Routines for Fundamental Astronomy (ERFA)

This repository contains the tools necessary for downloading the latest Standards of Fundamental Astronomy (SOFA) library and converting it to ERFA, a BSD-licensed code.

To download the latest SOFA and use it to generate ERFA source code, just do:

python sofa_deriver.py

which should generate an erfa directory with all the source code.

To see more options, do python sofa_deriver.py --help

Testing

To compile and execute the tests, do:

[CC] erfa/*.c -Ierfa -lm -o test_erfa
./test_erfa --verbose

where [CC] is replaced by your preferred C compiler.

Making single-file versions

source_flattener.py is provided to condense the source code into a single file. Just do:

python source_flattener.py

to get out erfa.c and erfa.h. In general you probably do not want to do this in the erfa-fetch repository, though, as it won't include any bugfixes in ERFA that have not yet been included in SOFA. Instead, do this in the actual erfa repository:

python source_flattener.py src -n erfa

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