[fitswcs] WCSLIB 6.3 releaed

[Mark Calabretta]

Greetings,

WCSLIB 6.3 is now available:

   ftp://ftp.atnf.csiro.au/pub/software/wcslib/wcslib.tar.bz2

This is primarily a maintenance release, as per the change log appended
below.

Mark Calabretta



WCSLIB version 6.3 (2019/07/12)
-------------------------------

* C library

  - Fixed the Polynomial and TPD distortions so that, as stipulated in
    WCS Paper IV, they are now considered to return an additive
    correction to be applied to the given coordinates, rather than the
    corrected coordinates themselves.

    Added a new subsection to the prologue of dis.h entitled 'Historical
    idiosyncrasies', which discusses this issue and other vagueries.

    Amended components of the test suite accordingly: SIPTPV.keyrec,
    TPV7.keyrec, and tdis1.c.

  - Fixed memory leaks and other potential problems that arose in the
    wcserr system consequent on changes made in release 6.1.

    Memory allocated by wcsfixi() for messages in the array of wcserr
    structs must now be freed by the caller.  Amended twcsfix.c
    accordingly.

  - Plugged memory leaks arising in disset().

  - New function wcsdealloc() provided to free memory allocated within
    certain WCSLIB routines.  Suggested by David Motl.

  - Eliminated a swag of inconsequential compiler warnings, particularly
    those emanating from the flex sources.

* Validation

  - The library, Fortran wrappers, utilities, and test programs now pass
    runtime analysis using -fsanitize=address and -fsanitize=undefined
    in gcc 8.3.0, in addition to valgrind.  Also compile-time strictures
    using -std=c99, -pedantic, -Wall, -Wextra, and -DFORTIFY_SOURCE=2.
    Prompted by feedback from Ole Streicher.

* Installation

  - The non-graphical tests now run reliably in parallel builds
    (make CHECK=nopgplot -j8 check).  Requested by Mohammed Akhlaghi.

    The graphical tests can also be run in parallel, but as PGPLOT can
    only handle one stream at a time, some graphics are likely to be
    lost.  Nevertheless, it is a useful option, especially with runtime
    analysis via -fsanitize=address, etc.

  - As CFITSIO doesn't provide a Fortran wrapper for fits_read_wcstab(),
    getwcstab_f.o is now always included in the WCSLIB object library
    and sharable library if CFITSIO is available (and the WCSLIB Fortran
    wrappers are required).  Use 'configure --without-cfitsio' to
    defeat this.

  - Tidied up some aspects of the build where CFITSIO is not available.

* User manual

  - Fixed minor formatting problems in dis.h.