Log Message:
Update to 7.11

Upstream changes:
WCSLIB version 7.11 (2022/04/26)
--------------------------------

* C library

  - In tabini(), the default index array should contain a 1-relative
    sequence: {1, 2,... N}.  Previously it was 0-relative.

WCSLIB version 7.10 (2022/04/24)
--------------------------------

* C library

  - In tabcpy(), collapse degenerate table index arrays if they are
    collapsed in the source struct.  Minor fix for output formatting
    in tabprt().

  - In the C test suite, added calls to wcstrim() in twcsfix to tidy
    the structs before printing.

* Utilities

  - The default option in wcsware now trims the wcsprm struct before
    printing it.  Use the '-p' option to print the untrimmed struct.

WCSLIB version 7.9 (2022/03/26)
-------------------------------

* C library

  - In wcsset(), bug fix for identifying time coordinate axes.
    Reported by Mihai Cara with patch.

WCSLIB version 7.8 (2022/03/25)
-------------------------------

* C library

  - In wcssub(), bug fix for tabular coordinates that change axis
    number, thus requiring tabprm::map to be updated.  Reported by
    Mihai Cara with patch.

    Also in wcssub():
      - check that all axes of a multi-dimensional table are extracted
        together,
      - fixed potential memory leaks for tabular coordinate axes when
        an attempt to subimage non-separable axes fails,
      - the error messages for non-separable coordinate systems are
        generally more informative,
      - subimage extraction by coordinate type now recognises time
        coordinate axis types via WCSSUB_TIME.

  - wcsset() now identifies time coordinate axes in wcsprm::types.

  - Extended test program twcssub to test the above modifications.

* Installation

  - Bug fix in the utils makefile for creating $(MANDIR)/man1.
    Reported by Aleksander Kurek.

  - Bug fix in the Fortran makefile for compiling and using 'tofits'.
    Reported by Stefan Br▒ns.

* User manual

  - Documentation generation moved to doxygen 1.9.3 (was 1.9.1).

WCSLIB version 7.7 (2021/07/12)
-------------------------------

* C library

  - In disfree() and disset(), removed potential for double invokation
    of free() on allocated memory.  Reported by Cyril Richard.

  - In wcsutil_fptr2str(), fixed a bug reported by Ralf Palsa (with fix)
    that caused it to be overly enthusiastic in stripping leading zeroes
    off addresses of function pointers.

  - In wcspcx(), replaced variable length arrays with allocated memory
    (portability issue).  Reported by Mihai Cara with patch.

  - Fixed buglets in wcsbth() and linsize() uncovered by gcc 11.1.0.

  - Quelled inconsequential compiler warnings from gcc 11.1.0 concerning
    wcsmix() (function prototype in wcs.h), wcstrim(), wcseulexe(),
    wcsulex(), and wcsutrne().

  - Defined _POSIX_C_SOURCE appropriately in tprj2.c and tspc.c to get
    the function prototype etc. for nanosleep() from time.h.

* Fortran wrappers

  - Quelled numerous inconsequential compiler warnings from gfortran
    11.1.0.

  - Fixed minor bugs uncovered by gfortran 11.1.0 in test programs tdis2
    and ttab3.

* Utilities

  - Moved 'tofits' from ./C/test/ into the utilities directory as it's
    generally useful, and added usage (converted to man page).

    Also made it a bit smarter in dealing with ISO/IEC 8859 and UTF-8
    encoded byte streams, in particular translating non-breaking spaces
    into ordinary spaces.

* Installation

  - Two patches for configure.ac provided by Mos▒ Giordano:
    1. makes it possible to build the Windows library using the MinGW
       cross-compiler,
    2. makes the soname of the MacOSX library consistent with other
       Unix systems.

WCSLIB version 7.6 (2021/04/13)
-------------------------------

* C library

  - Bug fix in tabs2x() triggered for 1-dimensional coordinate lookup
    tables on axes > 1.  Reported by Mihai Cara.

  - In datfix(), don't return status 0 if no change was made (fix for
    change made at release 7.4).  Reported by Derek Homeier.

  - New function wcspcx() in the wcsfix suite regularizes the linear
    transformation component of a coordinate description to make it more
    human-readable.  It decomposes CDi_ja into PCi_ja and CDELTia in
    such a way that CDELTia forms meaningful scaling parameters, often
    leaving an orthogonal or near-orthogonal matrix.  Optionally, it can
    then permute rows of this matrix to unscramble axis permutations.

    A test header may be generated from wcspcx.keyrec for input to
    wcsware (not exercised as part of the standard test suite).

  - New function wcstrim() frees memory allocated by wcsinit() for
    arrays in a wcsprm struct that remain unused after the struct has
    been set up.

  - New functions wcssize(), auxsize(), tabsize(), linsize(), dissize(),
    celsize(), prjsize(), spcsize(), and wcserr_size() compute the total
    size of the relevant structs, including allocated memory.

  - In the C test suite, inserted a brief pause in tprj2 and tspc, which
    otherwise have now become a blur.

* Fortran wrappers

  - Added wrappers for wcspcx(), wcstrim(), wcssize(), auxsize(),
    tabsize(), linsize(), dissize(), celsize(), prjsize(), spcsize(),
    and wcserr_size().

* Utilities

  - Added -c, -cp, -C, and -Cp options to wcsware to apply wcspcx()
    in a variety of ways, -m to apply wcstrim(), and -z to report the
    total size of the wcsprm struct with a breakdown of the sizes of
    its constituent structs.

  - Fixed compiler warnings for sundazel (portability issue).

* Installation

  - Upped the required version of Flex to 2.6.0 (was 2.5.9).  Problems
    with Flex 2.5.39 reported by Derek Homeier.

    Also added '--disable-flex' as a new configure option to force the
    use of the pre-generated Flex sources.

WCSLIB version 7.5 (2021/03/20)
-------------------------------

The C code in WCSLIB is moving piecemeal to the C99 standard.  In fact,
various indispensible C99 constructs have been used in WCSLIB for many
years: the long long int data type (in fitshdr() only); stdint.h,
inttypes.h, and the use of PRI formatting control (in wcsprintf(), which
is widely used by the library); and the C99-extended library function
vsnprintf() (used by wcserr for a decade).  Flex-generated C code also
uses C99 extensions, though with workarounds if they are not available.

Except in the header prologues, which are formatted in a special way for
generating the user manual, comments were changed en masse to C99 style
in release 7.3.1, and variable declarations in code that I have occasion
to modify will transition to the more general placement allowed by C99.
However, I have no plans to use any of the more esoteric features of
C99.

* C library

  - New function, wcsccs(), changes the celestial coordinate system of a
    wcsprm struct, for example, from equatorial to galactic coordinates.
    The parameters that define the spherical coordinate transformation
    must be provided.  This allows WCSLIB to provide this functionality
    without needing to know anything about specific celestial coordinate
    systems, and has the advantage of making the routine completely
    general.  Requested by Mohammad Akhlaghi.

    Modified test program twcsfix also to test wcsccs().

  - Fixed a problem common to all of the Flex code (fitshdr, wcsbth,
    wcspih, wcsulex, and wcsutrn) that made it thread-unsafe.  Reported
    by Cyril Richard.

    Added a new test program, tpthreads, to test thread safety.  It is
    only used for code development, and not exercised as part of the
    standard test suite.

  - In fitshdr(), fixed a problem that potentially could arise on
    systems where sizeof(long long int) is greater than 8 (64 bits).

* Fortran wrappers

  - Match changes to the C library: added a wrapper for wcsccs(), and
    modified twcsfix.f.

  - Because null addresses cannot be passed to functions in Fortran,
    wcssub_() now interprets *nsub == -1 && *axes == -1 as a signal to
    do a deep copy of one wcsprm struct to another.

* Utilities

  - New utility, sundazel, computes the local time of the Sun's passage
    through the specified apparent longitude or latitude in a user-
    defined coordinate system.  It can also perform several other Solar
    related calculations.  (It is unrelated to FITS WCS, and does not
    use WCSLIB.)

* Installation

  - Added an 'uninstall' rule to the makefiles.  Suggested by
    Cyril Richard.

WCSLIB version 7.4 (2021/01/31)
-------------------------------

* C library

  - In wcshdo(), fixed a bug introduced in release 5.9 that potentially
    caused loss of numerical precision in the sprintf() formatting of
    floating point keyvalues.  This was triggered when a large range of
    CRPIXja, PCi_ja, or CDELTia values (as three separate groups) were
    formatted using an 'f' format descriptor, the range not being so
    large that it would have forced wcshdo() to revert to 'E' format.
    Reported by Mohammad Akhlaghi.

    Also in wcshdo(), fixed a bug introduced in release 7.1 that caused
    the coefficients of the TPD distortion function not to be written to
    the header.  TPD and Polynomial distortion function headers will now
    always include the DPja.DOCORR keyword.  Reported by Derek Homeier
    with patch.

  - In wcsset(), fixed a segv generated in attempting to report a non-
    standard units string with wcserr message reporting disabled.
    Reported by Mohammad Akhlaghi.

    In wcsutrne(), allow 'Angstroms' and 'angstroms' as additional
    synonyms for 'Angstrom'.

  - In datfix(), ensure that 0 is returned if an informational message
    is set in wcsprm::err.  Consequent on feedback independently from
    Mihai Cara and Bruce Merry.

    Clarified that informational messages may be set in wcsprm::err
    for returns of 0 from datfix(), obsfix(), unitfix(), and spcfix().

* User manual

  - Added cautions about translating CDi_ja to PCi_ja plus CDELTia for
    those historical distortion functions (TPV, TNX, ZPX) that expect to
    operate on intermediate world coordinates, rather than intermediate
    pixel coordinates.  Consequent on feedback from Mohammad Akhlaghi.

  - Documentation generation moved to doxygen 1.9.1 (was 1.8.19).

WCSLIB version 7.3.1 (2020/08/17)
---------------------------------

There are no functional changes in this release.

* C library
* Fortran wrappers
* PGSBOX
* Utilities

  - Changed all C code, including within the flex sources, Fortran and
    PGSBOX wrappers, and test suite, to use C99 style commenting (i.e.
    using //), excluding the header prologues used to generate the user
    manual.

* User manual

  - Documentation generation moved to doxygen 1.8.19 (was 1.8.18).

WCSLIB version 7.3 (2020/06/03)
-------------------------------

* C library

  - wcshdo() was writing MJD-OBS twice to the header, and MJD-BEG not
    at all.

  - In wcshdo(), if MJDREF assumes its default value, just write
    MJDREF = 0 (not MJDREFI & MJDREFF), and omit writing DATEREF,
    which, with a value of '1858-11-17', looks strange and is
    potentially confusing.  Reported by Thomas Robitaille.

    If the fractional part of MJDREF is zero, then just write the
    integer part as MJDREF (i.e. not as MJDREFI & MJDREFF).

  - Bug fix in wcsfix() - it was writing error messages that referred
    to DATE-REF and MJD-REF rather then DATEREF and MJDREF.  Reported
    by Mihai Cara.

  - Under control of a new flag, WCSHDR_DATEREF, added the option to
    wcspih() and wcsbth() to accept DATE-REF, MJD-REF, MJD-REFI,
    MJD-REFF, JDREF, JD-REFI, and JD-REFF as synonyms for the standard
    keywords, DATEREF, MJDREF, MJDREFI, MJDREFF, JDREF, JDREFI, and
    JDREFF.  The latter buck the pattern set by the other date keywords
    ({DATE,MJD}-{OBS,BEG,AVG,END}), thereby increasing the potential
    for confusion and error.

* Fortran wrappers

  - As compilers are becoming much stricter (gfortran 10), modified all
    Fortran test programs to use the type-specific equivalents of the
    various *PUT and *GET routines.  Reported by Ole Streicher.

  - For the fitshdr wrappers, added type-specific equivalents of
    KEYGET: KEYGTI, KEYGTD, and KEYGTC.

* PGSBOX

  - Modified pgtest to use the type-specific equivalents of WCSPUT.

* User manual

  - In the section "WCSLIB Fortran wrappers", promoted use of the type-
    specific equivalents of the various *PUT and *GET routines.

  - In the section "FITS-WCS and related software", added ASCL and ADS
    codes, where they exist, for all software packages mentioned.

  - Documentation generation moved to doxygen 1.8.18 (was 1.8.17).