INTRODUCTION

This document describes the difference between CGNS 4.2.0 and
CGNS 4.3.0 and contains information on known problems in
CGNS 4.3.0.

Links to the CGNS current released source code can be found at:

http://cgns.org/download.html

User documentation for the current release can be found at:

http://cgns.org/CGNS_docs_current/midlevel/index.html

For more information, see the CGNS home page:

http://cgns.org

CONTENTS

• New Features
• Bug Fixes since CGNS 4.2.0
• Known Problems

New Features

Configuration:

N/A

Library:

N/A

Parallel Library:

N/A

Fortran Library:

N/A

Tools:

N/A

Bug Fixes since CGNS 4.2.0 release

Library:

• Add a context structure to handle cleanly cgio/hdf5 state, CGNS-247
• When opening a CGNS file with MLL the whole file is parsed. Moreover, the zone is sorted alphabetically. The new read pattern proposed relies on a qsort algorithm to sort the zone by name. It also adds a small "_children_t vector" to cache node data read during base node parsing. Thus, it should prevent multiple small reads and be more efficient PR #263
• Fix bad cast in parallel test, PR #264
• Add some missing macros PR #265
• Added Timing stats to make tests PR #293
• Fixed conflicts with struct stat that comes in sys/stat.h header with MSVC. Older compilers may have other things, but it is just not valid to do it without more sophisticated checks, PR #303
• CMake fortran compatibility issue CGNS-10 was addressed by adding add_library(cgns_f2c OBJECT cgns_f.F90), CGNS-10. PR #307
• Fix an uninitialized local array by copying m_dimvals to dimvals. Indeed, m_dimvals[:] should be 0. However, the argument passed to H5Screate_simple() is dimvals, which is an uninitialized local array. PR #310
• Set the default file_type in cg_open only when in write mode, PR #311 , CGNS-266
• Remove unneeded file access check in cgnslib layer, PR #312
• Use intel headers instead of msvc PR #314
• Added src/Test_UserGuideCode/C_code_parallel autotool's build and tests. Fixed issues with C examples,PR #318 CGNS-260
• Multiplication result converted to larger type fixes PR #319
• Misc. LGTM fixes PR #328
• Fixed misc. Codacy reported errors, PR #330
• Basic detection of duplicate face indices in NFaces (Thanks to BETA CAE) PR #331 and PR #335
• Fixed clang -Wstrict-prototypes warnings PR #332

Fortran:

• Fixed all the missing scope enumerations in the Fortran tests, which lead to getting rid of the fixed formatting, Reworked CONCATENATE to work with gfortran (see cgnstypes_f03.h.in), CGNS-249, PR #267
• Fortran tests/examples clean-up, fixed typo and removed remaining numbered DO loops, CGNS-249, PR #268
• Fixed Base/Zone formatted donorname are not managed, CGNS-261, PR #322

Configuration:

• CMake fixes for CGNS-256, CGNS-257, CGNS-258 PR#292
• Remove the use of Relative paths in LINK_DIRECTORIES, CGNS-163
• Replaced #ifdef JFC_PATCH_2015_2 with cg_configure options, CGNS-244 PR #270
• Keep default library name on MinGW, PR #271
• Modernize CGNS cmake , PR #317
• Checks if HDF5 supports parallel I/O if parallel is enabled in CGNS #321, PR #321

Tools:

• cgns_info was not installed fixed, CGNS-257

Known Problems

************ FORTRAN ************

• A gfortran bug in version 10.2 broke Fortran mapping and caused cg_goto_f
  to segfault. All other versions of gfortran are suitable.
  (ref. CGNS-246, GNU BUG 100149)

• A bug in gfortran (all versions) causes cg_configure_f to fail,
  GNU BUG 99982. Other Fortran compilers are fine.

************ FORTRAN END ********

************ CGNSVIEW ************

• cgnsview for OSX is not viewing properly and cgnsview under Windows
  may fail to compile due to tcl/tk incompatibility.

************ CGNSVIEW END ********

• For other issues, see https://cgnsorg.atlassian.net
  

Supported Platforms

The following platforms are supported and have been tested for this release.
They are built with the configure process unless specified otherwise.

Linux 3.10.0-1127.10.1.el7    gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
#1 SMP ppc64 GNU/Linux        g++ (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
(echidna)                     GNU Fortran (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
Linux 2.6.32-573.18.1.el6     IBM XL C/C++ V13.1

#1 SMP ppc64 GNU/Linux        IBM XL Fortran V15.1

(ostrich)
Linux 3.10.0-327.10.1.el7     GNU C (gcc), Fortran (gfortran), C++ (g++)

#1 SMP x86_64 GNU/Linux       compilers:

(jelly/kituo/moohan)          Version 4.8.5 20150623 (Red Hat 4.8.5-39)

Versions 4.9.3, 5.3.0, 6.3.0, 7.2.0

8.3.0, 9.1.0, 10.1.0

Intel(R) C (icc), C++ (icpc), Fortran (icc)

compilers:

Version 17.0.0.098 Build 20160721

MPICH 3.3 compiled with GCC 7.2.0

OpenMPI 4.0.0 compiled with GCC 7.2.0

NAG Fortran Compiler Release 7.0(Yurakuchho) Build 7011
SunOS 5.11 11.4.5.12.5.0      Sun C 5.15 SunOS_sparc 2017/05/30

32- and 64-bit                Studio 12.6 Fortran 95 8.8 SunOS_sparc 2017/05/30

(hedgehog)                    Sun C++ 5.15 SunOS_sparc 2017/05/30
Windows 10 x64                Visual Studio 2015 w/ Intel Fortran 18 (cmake)

Visual Studio 2017 w/ Intel Fortran 19 (cmake)

Visual Studio 2019 w/ Intel Fortran 19 (cmake)

Visual Studio 2019 w/ MSMPI 10.1 (cmake)
macOS High Sierra 10.13.6     Apple LLVM version 10.0.0 (clang-1000.10.44.4)

64-bit                        gfortran GNU Fortran (GCC) 6.3.0

(bear)                        Intel icc/icpc/ifort version 19.0.4.233 20190416
macOS Mojave 10.14.6          Apple LLVM version 10.0.1 (clang-1001.0.46.4)

64-bit                        gfortran GNU Fortran (GCC) 6.3.0

(bobcat)                      Intel icc/icpc/ifort version 19.0.4.233 20190416

Tested Configuration Features Summary

In the table below
      y   = tested
      n   = not tested in this release
      x   = not working in this release

[1] Paralle