- qh_mem, qh_merge: Log before 'delete' instead of afterwards [Coverity, K. Schwehr]
 - qh_merge: Test for NULL horizon in qh_checkzero [Coverity, K. Schwehr]
 - qh_matchneighbor: Check for matchfacet not a neighbor of facet [Coverity, K. Schwehr]
 - qh_triangulate: Explicit check for visible==NULL [Coverity, K. Schwehr]
 - qh_findbestfacet (unused by qhull): Fix test of isoutside [Coverity, K. Schwehr]
 - qh_check_maxout: Check bestfacet!=0 for logging its id [Coverity, K. Schwehr]
 - qh_nearvertex: Check for bestvertex not found [Coverity, K. Schwehr]
 - qh_checkfacet: Check for missing neighbors of simplicial facets [Coverity, K. Schwehr]
 - qh_setdelnth: Check 'nth' before using it [Coverity, K. Schwehr]
 - Annotate code for Coverity warnings (most of these protected by qh_errexit) [K. Schwehr]

 - qh_printfacet3math: explicit format string (duplicates change to io.c) [B. Pearlmutter]
 - libqhull_r.h: fix spelling error (duplicates change to libqhull.h) [B. Pearlmutter]
 - unix_r.c: fix spelling error (duplicates change to unix.c) [B. Pearlmutter]
 - qhull_a.h: define qhullUnused() only if defined(__cplusplus) [R. Stogner]
 - qh_version: Use const char str[]= "string" instead of const char * str= "string" [U. Drepper, p. 27]
 - qh_newvertex: Use UINT_MAX instead of 0xFFFFFFFF
 - qh_newridge: Use UINT_MAX instead of 0xFFFFFFFF
 - Reviewed FIXUP notes

 - QhullRidge_test: t_foreach use 'foreach(const QhullVertex &v, vertices)
 - Made '#include "RoadTest.h" consistent across all C++ tests

 - qh-code.htm: May also use libqhull_r (e.g., FOREACHfacet_(...))
 - qh-get.htm: Add list of download build repositories

 - Add CMakeModules/CheckLFS.cmake: Enables Large File Support [B. Pearlmutter]
 - Makefile: Use -fpic at all times instead of -fPIC, [U. Drepper p. 15]

Moved 'to do' comments into Changes.txt

global_r.c: Fixed spelling of /* duplicated in...qh_clear_outputflags */ [K. Schwehr]

    qhulltest OK
    make testall OK
    Qt, CMake, and make build OK

Summary of Perforce changes @1811,@1954 from Jan 17, 2015 to date
See src/Changes.txt

    Code
        Remove qhull_inuse
        Add qh_lib_check to verify library compatibility
        Change qh.vertex_visit, vertexT.id, ridgeT.id, qh.vertex_id, and qh.ridge_id to 32-bits
        *.c: Prefix include headers with directory name (e.g., libqhull_r/)
        user_r.c: Clear qhT.ALLOWrestart in qh_errexit
        global_r.c: Check that qh.NOerrexit is cleared before call to qh_initflags
             User must clear NOerrexit after setjmp()
        global_r.c: Add qh_zero to reset qhT before first use.  Needed for user_eg_r.c
        global_r.c: Add qh_lib_check() for library compatibility
        global_r.c: Add qh_zero() to initialize and zero memory for qh_new_qhull
        global_r.c: Version includes a '.r' suffix to indicate 'reentrant'
        global_r.c: Guarantee that qh->run_id!=0.  Old code assumed that qh_RANDOMint was 31 bits
        io_r.c: Commented out qh_compare_vertexpoint.  Not used and not implemented in libqhull_r
        mem_r.c: Add qh_memcheck() to verify memory buffers
        mem_r.h: Define ptr_intT as 'long long' for __MINGW64__ [A. Voskov]
        qconvex_r.c,etc: Comment-out _isatty declaration.  Avoids "C4273 ... inconsistent dll linkage"
        random_r.c:  Moved global variable qh_last_random to qhT.last_random
        rboxpoints_r.c: Replace longjmp with qh_errexit_rbox
        stat_r.c: Remove qh_freestatistics().  Part of qhT now.
        Rename 'int' to 'countT' where more than 32-bits may be needed
        Remove old code for __MWERKS__ && __POWERPC__
        Replace qh_pointid returns with qh_IDunknown, qh_IDnone, and qh_IDinterior
        Points are equal if same coordinates
        Add in-line comment about expected warnings (e.g., **freelistp)
        Remove vertexT.dim -- No longer used by C++

    Build
        Reentrant files are named with '_r' suffix
        Deprecated qh_QHpointer files are named with '_p' suffix
        Removed the 'p' builds for qh_QHpointer.  They were confusing
          Renamed libqhull_p.vcproj to qhull_p.vcproj
        Makefile: Reorganized targets: test, qtestall, and testall
        Makefile,etc: Changed to gcc -O3 (was -O2)

        libqhull_r/Makefile: Add 'make help' and 'make test'
        Use mingw-w64 instaed of mingw
        Use 'Win64' tag for CMake
        Removed Debian 'config' directory, doesn't work
        Removed qhull_interface.cpp
          'math.h' is apparently no longer a problem.  Perhaps include it before qhull_a.h
        Removed make-vcproj.sh -- too specific to VC 2005

    Doc
        See "C++ interface" in Changes.txt for notes on migrating C++ code
        Changes.txt: Add notes on 'countT'
        Clarified qhalf space documentation for the interior point [J. Santos]
        Rearrange qh-code.htm to emphasis C++ interface.  Move performance and wish list to end

    C++
        QhullFacet: Increment Zdistio statistic
        QhullHyperplane: Remove default constructor
        QhullPoint: Change operator==() to sqrt(distanceEpsilon)
        QhullPoints: Enable operator=()
        PointCoordinates: Add assignment of base class QhullPoints to operator=
        PointCoordinates: Rename point_comment to describe_points
        QhullQh: Add qh.ISqhullQH to indicate initialization
        QhullSet,etc: Include <cstddef> for ptrdiff_t
        QhullSet: Enable operator=.  Copy constructor and assignment only copies pointers
        QhullSet<T>: Add 'typename T' to definition of value()
        QhullVertexSet: error if qhsettemp_defined at copy constructor/assignment (otherwise double free)

        Delete Point_test.cpp.  It was replaced by QhullPoint_test.cpp
        Add QhullVertexSet_test.cpp to qhulltest.pro
        Moved UseOutputStream to a field with enableOutputStream
        Removed UsingLibQhuill*.cpp.  It is not needed with reentrant Qhull

Updates to libqhullcpp for libqhullr.

See Changes.txt for details.

Delete user_eg7,8,9 replaced by user_egp,2,3
Rename qhull_ra.h
Change spacing for type annotations to 'QhullVertext &' etc
Each class needs access to qhT via QhullQh
Moved messaging into QhullQh to simplify memory allocation
Add 'const Qhull &' constructors for C++ classes
Printing QhullRidge includes a message

Ran RboxPoints_test.cpp
Ran QhullPoint_test.cpp

libqhullr
  Renamed add *.c and *.h references to *_r.c and *_r.h
  Added *.htm from libqhull

Redesigned QhullPointSet around QhullSet<>
Ran QhullPointSet_test.cpp

branch qhull_r.h as reentrant version of qhull_a.h

Fixed qh_MEMalign for testqset and testqsetr

libqhullcpp will be based on qhullstatic_r
Runs user_eg3 on qhullpcpp ok

Ran OK the first time
Added rboxr

Includes libqhullstaticr and libqhullr

Branched reentrant Qhull
   libqhullr/*_r.*
   libqhullrcpp/*
   qhullr/*_r.*
   qhullrtest/*

Fixed version in File_id.diz
Restored path variable to qhulltest.vcproj for $QTDIR
Fixed qhull-zip.sh for qhull_p.dll
Updated download page

Code changes
 - Require option 'Qz' for Delaunay triangulation/Voronoi diagram
   of cocircular/cospherical points [D. Sheehy]
 - qh_errexit: Do not call qh_printsummary or qh_printstats on qh_ERRinput
 - Change error QH6227 (all degenerate) from qh_ERRinput to qh_ERRprec
 - Change error QH6159 (ID overflow) from qh_ERRinput to qh_ERRqhull
 - eg/q_eg, q_egtest, q_test: Run if qconvex is in $PATH [M. Atzeri]

Build changes [M. Atzeri]
 - Install to share/doc/qhull instead of share/doc/packages/qhull
 - On Unix systems, install to share/man/man1 instead of man/man1
 - CMakeLists: Remove the installation of user_eg* and testqset
 - CMakeLists: Remove VERSION from qhull executables and libraries
 - CMakeLists: Define qhull_SOVERSION instead of qhull_MAJOR
 - CMakeLists: Set SOVERSION for shared libraries
 - Rename libraries to qhull, qhull_d, qhull_p, and qhull_pd
   libqhull6_p.vcproj is now libqhull_p.vcproj
   mingw builds as libqhull.dll
   cygwin builds as cygqhull-6.dll
   linux builds as libqhull.so.6.3.1 with symbolic link as libqhull.so
 - Developers using qhull 2011:
   libqhull6.so is now libqhull_p.so.  Do not use libqhull.so.
   qhull6.dll is now qhull_p.dll.  Do not use qhull.dll.
 - Merged road/ into libqhullcpp/ and qhulltest/
   Moved RoadLogEvent.* and RoadError.* to libqhullcpp
   Moved RoadTest.* to qhulltest (requires Qt)
   Installed RoadTest.h in libqhullcpp

Doc changes
 - index.htm: Mathworks uses qhull for n-d
 - qhull.htm: Fix qhull for qconvex
 - qdelaun.htm/qvoronoi.htm: Use option 'Qz' for circular/cospherical inputs
 - make help: Display targets
 - Makefile: Better messaging

Updated dates.
Removed some more build products from cleanall
Removed out-of-date builds from qh-get
Reorganized the links to the documentation in index.htm

Bug fixes
 - Fixed qset.c for -fno-strict-aliasing. This gcc option is no longer needed
   (disallow two pointers of differing types to the same memory location)
 - Fixed error in qh_setappend_set if first set full and second set empty
 - qh_setdelnth, qh_setdelnth_sorted: fixed wording of error message
 - qh_setcheck: error message listed size and max backwards.
 - qh_setequal: Allow NULL set as documented
 - qh_setindex: Allow NULL set as documented
 - qh_settemppush: report error if NULL

Code changes
 - Add testqset: low level test of qset.c with mem.c
 - qh_setendpointer: Implements QSet::endPointer()
 - Assigned unique error code for qh_gethash

Build changes
 - Added qhull.dll(.so) for Octave and other Debian builds
   The global data structure qh_qh is statically defined (no qh_QHpointer)
   Linked user_eg2 with qhull.dll (libqhull.so) instead of qhullstatic
   Added qh_dllimport to libqhull.h for qhull.dll with MSVC
   Changed qhull-app-shared.pri to use libqhull (without qh_QHpointer)
 - Renamed libqhull6.so to libqhull6_p.so
   Renamed qhull6.dll to qhull6_p.dll
   The _p libraries (e.g., libqhull6_p.so) require -Dqh_QHpointer
   Renamed qhull6.vcproj to libqhull6_p.vcproj
   Added libqhullp/libqhullp.pro for shared library (libqhull6_p.so)
   Added qhull-app-sharedp.pri for shared libraries with qh_QHpointer
 - Install libqhull/*.htm files into include/libqhull
 - Removed libqhull/qhull.h-deprecated
 - Other changes to Makefile builds
   Added 'make qtestall' as a smoketest of each qhull program
   src/libqhull/Makefile: Use 'ar -rs ...' instead of ranlib
   src/libqhull/Makefile: Fixed targets for cleanall
 - Other changes to DevStudio builds
   Moved pdb files for qhull libraries to lib/
   AdditionalIncludeDirectories: Removed ../src/libqhullcpp
   Use build-cmake/ for the DevStudio CMake build
 - Other changes to Qt builds
   Renamed qhull-libsrc.pri to qhull-libqhull-src.pri
 - Added explicit d2u conversions to qhull-zip.sh
 - Fixed \n vs. \r\n issues for Windows source files

 Draft of Debian/AutoConf build (untested)
 - Adjusted the Makefile.am's for the new directory structure.
 - Added testqset to bin_PROGRAMS
 - config/bootstrap.sh copies program sources into src/libqhull
 - Kept qh_QHpointer=0 (static global data structure, qh_qh).  It is faster.
   Planning a new interface (qhull7?) which passes qh_qh as a parameter
 - Added config/changelog from the 2003.1 Debian build
 - Moved the debian/patches directory to config/
   Optional patches to change smoketest message and turn on qh_QHpointer
 - Deleted the debian directory.  It was the old Debian build from 2003.1
   Rafael Laboissiere's config directory replaced this build..
 - Deleted Make-conf.sh (also the old Debian build)

Doc changes
 - FAQ: Updated notes on computing volume of a Voronoi region
 - Added direct link to ACM Digital Library for downloading the qhull paper
 - Added link to Qhull in R
 - qset.c: Updated notes about NULL sets
 - qh_setappend: clarify qh_setappend for NULL newelem
 - qh_setdellast: Fix head note
 - Add build/README.txt
 - Add uninstall instructions to README.txt and CMakeLists.txt
 - Added instructions to create build/*.vcproj to CMakeLists.txt
 - Update copyright to 2012

 - Adjusted the Makefile.am's for the new directory structure.
 - Kept qh_QHpointer=0 (static global data structure, qh_qh).  It is faster.
   Qhull 2012 may have a new interface which passes qh_qh as a parameter
   But the other builds of qhull 2011.2 define qh_QHpointer=1 for qhull6.so
 - Added config/changelog from the 2003.1 Debian build
 - Moved the debian/patches directory to config/
   It was not used for qhull 2009.1.  Was it used for other Debian builds?
 - Deleted the debian directory.  It was the old Debian build from 2003.1
   Rafael's config directory replaced this build..
 - Deleted Make-conf.sh (also the old Debian build)

Rewrote FAQ: How do I compute the volume of a Voronoi region?

<li>Replace Qhull-go.pif with Qhull-go.lnk for Windows 7 64-bit [lots].
<li>Report an error if qh_newhashtable, qh_setnew, or qh_memalloc overflows [X. Cheng].  Overflow may occur on 64-bit hosts.  Qhull uses 32-bit ints for identifiers, counts, and sizes.
<li>FAQ: How to compute the volume of a Voronoi region [C, Brinch].
<li>For qhull library users, qh_new_qhull calls qh_prepare_output if !outfile [A. Aldoma].
<li>Fixed LF line endings for qhull-2009.1.2 [P. Cheeseman].
<li>Added simple makefile to src/libqhull.

Bug fixes
 - qh_new_qhull: Call qh_prepare_output if !outfile [A. Aldoma]
   No effect on qhull users since qh_prepare_output is always called.
 - Replace Qhull-go.pif with Qhull-go.lnk for Windows 7 64-bit [lots]
 - Error if qh_newhashtable, qh_setnew, or qh_memalloc overflows [X. Cheng]
   For example, 'rbox 64 D32' overflows hash table for qh_matchnewfacets
   Qhull uses 32-bit ints for identifiers, counts, and sizes. See "WARN64"
 - q_eg, q_test: change tail +3 to tail -n +3 [N. Dubray, M. Atzeri]
 - Qhull-go.bat: Changed 'cmd' to '%comspec%'

Build changes
 - Added src/libqhull/Makefile for simple gcc build of executables and lib
 - qhulltest.vcproj: Replaced full path to QT with $QTDIR (e.g., c:/qt/4.7.4)
 - Split userprintf_rbox.c from userprintf.c,
   Otherwise qhull brings in rboxlib and rbox brings in libqhull
 - Makefile: qhullx target must be after LIBQHULLS_OBJS
 - Makefile: Explicitly list rbox dependencies for qhullx target
 - MBorland: Fixed tabs
 - Placed $LIBQHULLS_OBJS in same order.  Frequently called ones together.
 - Update file lists for Make-config.sh [O. Lahaye]
 - CMakeLists: add README.txt,etc. to DOC_INSTALL_DIR [M. Atzeri]
 - Restored qhull.h-deprecated.
   qhull.h conflicts with Qhull.h on Windows systems [C. Abela]
 - make-config.sh: Add warning that it is out-of-date
 - Remove extra space in '#! /bin/sh' in q_eg, etc. [P. Cheeseman]

Source changes
 - libqhull.h: Added qh_True and qh_False for True/False [A. Mutzel]
   Did not remove or replace True/False since it is used everywhere
 - Moved error message from qh_argv_to_command to caller.  Avoids dependency.
 - user_eg3.c: Use '10 D2' as default rbox (e.g., 'user_eg3 rbox qhull d')
 - user.c, user_eg2.c: Add test of qh_qh as done in user_eg.c
 - q_test: Removed duplicate test of qhull C-0.02

Documentation
 - index.html: Added ACM Authorizer link to ACM Trans. Math. Software
 - Split Delaunay and Voronoi FAQs
 - FAQ: How to compute the volume of a Voronoi region [C, Brinch]
 - Add 'FS' to qconvex prompt (total area and volume)
 - Add clarification to 'Fv' about corner input sites [O. Can]
 - Qhull-go.bat: Removed out-of-date advice.  Added title.
 - qh-code.htm: Updated the discussion of multi-threading for C++ [I. Pirwani]

 - delaunay.vcproj: Fixed qhullstatic_d.lib for debug and minrelsize builds
 - Redated distribution from 2011/5/18
 - .gitignore: added build and lib
 - Add 'm' library to shared and static targets on Unix [A. Bouchard]

 - PointCoordinates.cpp: Add #include <iterator> [R. Richter, S. Pasko]
 - Remove deprecated libqhull/qhull.h
   Use libqhull/libqhull.h instead.  It avoids confusion with libqhullcpp/Qhull.h
 - Makefile: Add LIBDIR, INCDIR, and DESTDIR to install [L.H. de Mello]
     Separate MAN install from DOC install
     Create install directories
     Installs headers to include/libqhull, include/libqhullcpp, include/road
 - CMakeLists.txt: Add MAN_INSTALL_DIR for qhull.1 and rbox.1 man pages
     Add RoadTest.h to include/road for Qt users (road_HEADERS)
 - Renamed md5sum files to avoid two extensions
 - qh-get.htm: Add Readme links and 2009.1 note.
 - qh-optf.htm: Fix link
 - index.htm: Updated Google Scholar link
 - qhull-zip.sh: Improved error message.

Fixed LD_LIBRARY_PATH prompt
Add md5sum files to qh-get.htm and fixed name to workaround Opera bug
Prefer Google Scholar over Citeseer

 - Add headers to CMakeLists SOURCES and *.vcproj
 - Update date for release
 - CMakeLists: Fix user_eg target
 - Redo path for q_eg, etc.
 - Add user_eg3 to q_test
 - Update q_test-ok.txt and qhulltest-ok.txt
 - Fix qhull-zip.sh for new directory structure, and clean step
 - Change DOS window to command window
 - Fix html links
 - Drop the Spanish mirror site.  It was disabled.
 - qh-get.htm: Update download instructions
 - Makefile: fix clean/cleanall
 - Fix name of libqhullstatic_p.a
 - Updated README.txt
 - Fixed MBorland.  My install did not have c0x32.obj configured
 - Fixed includes for qhull_interface.cpp

 CMakeLists: Change Win32 doc install to doc/

- Fixed Qhull-go.bat.  QHULL-GO invokes it with command.com,
- user_eg2.c: Removed extern wrapper

 Redid vcproj for DevStudio builds
 - Updated files for 2011.1
 - Rename libqhull to libqhull6 in accord with qhull6.dll
 - Added qh_QHpointer_dllimport to work around MSVC problem
 - user_eg.c: Added test of qh_qh for qh_QHpointer_dllimport
 - qhull-exports.def: Identify data items
 - qhull-exports.def: Add VERSION
 - Add test for executables to q_eg, etc.
 - Add explanation of user_eg* to user_eg prompts
 - index.htm: Fix MATLAB links
 - QhullFacet: Added isSimplicial, isTopOrient, isTriCoplanar, isUpperDelaunay

Add Fixup identifiers
Use qhull_d6 instead of qhull_d

- qvoronoi: Deprecated 'Qt' and 'QJn'.  Removed from documentation and prompts.
  These options produce duplicate Voronoi vertices for cospherical data.
- QhullError: Add copy constructor, assignment operator, and destructor
- Add throw() specifiers to RoadError and QhullError
- Fixed additional uses of strncat
- Removed doskey from Qhull-go.bat.  It is incompatible with Windows 7
- mem.h: Define ptr_intT as 'long long' for Microsoft Windows _win64 builds.
  On Linux and Mac, 'long' is 64-bits on a 64-bit host
- Moved include's to top of Qt .pro files.  Define $VERSION before $VER_MAJ.
- Name shared library with $VER_MAJ

The application builds well, but, as before, neither the pro
files nor the vcproj files build a good dll using devstudio

Dropped libqhullp.  It does not make a large difference
Switched user_eg as the libqhull example.
Fixed LIBQHULLSP_OBJS.  Moved shared library to lib/...
Set Version to 6.0.0

Fix so reference in all target

Fix shadowed variable 'facets'
Fix gitignore for sln/vcproj

 - The DevStudio/msvc build does not work for shared libraries (dll)
 - Fixed QhullFacet::PrintRidges to check hasNextRidge3d()
 - Cleaned up Qt project files
 - Fixed Makefile for shared libraries
 - Moved libqhull to libqhullstatic, as done in CMakeLists
 - Made libqhull a shared library
 - Restored /INCREMENTAL:NO since CONFIG -= incremental did not work
 - Added 'facets' argument to user_eg3.cpp

 - Pull out gcc warnings into qhull-warn.pri
 - Pull out libqhull files into qhull-libsrc.pri
 - Document location of qh_QHpointer
 - Use CONFIG incremental instead of vc option
 - user_eg2 links with shared library (project will be added later after rename)

 - Added libqhullp, libqhullcpp, user_eg3, qhulltest to Makefile
 - Build: Removed -frtti from gcc build
 - Build: Comment out -Werror
 - Removed semicolon after extern "C" {...}
 - Renamed parameters, locals, and fields to avoid shadowing
 - Updated test programs for new location of bin/qhull
 - Removed unused QhullEvent/QhullLog

Needed to disallow --conversion and --shadow due to Qt warnings