- not yet release, but some of the API and file locations are closer
  to 1706 than to 1612. Needed, for example, for swak4foam.

- suppress error messages that appear with zsh.
  According to unset(1p), 'unset -f' unsets a function.
  If the function was not previously defined, this is a no-op.
  This is similar for zsh, but there it emits a warning if the
  function was not previously defined.

- avoid 'local' in functions sources from etc/bashrc.
  ksh does not support this.

- use 'command' shell builtin instead of 'type'.
  Seems to be more consistent between shell flavours.

- POSIX specifies '-c' for counting the number of matching lines,
  so we can just use that instead of 'wc' in wmake

- if called from the top-level project directory ($WM_PROJECT_DIR)
  default to using {applications,src} directories. This avoids
  erroneous linking of etc/codeTemplates and avoids the lengthy
  scanning of the tutorials directory

- minor bug: 'wclean empty' may have had issues with logical vs physical path

- handle sourcing bashrc with a relative path (issue #383)
- handle sourcing from bash and zsh.
  Still need manual intervention when sourcing dash, sh, or ksh.
- replace grep in etc/cshrc with sed only
- logical instead of physical path for WM_PROJECT_DIR (issue #431).
  Doesn't seem to be possible for csh/tcsh.

  * Continue using physical locations when comparing directories,
    but not for the top-level FOAM_INST_DIR, WM_PROJECT_DIR.

- relocate WM_CC, WM_CXX overrides from etc/config.*/compiler
  to etc/config.*/settings to ensure that they are left untouched
  when etc/config.sh/compiler is sourced while making third-party
  packages (eg, gcc, llvm, CGAL).

- provide fallback FOAM_TUTORIALS setting in RunFunctions

STYLE: remove "~OpenFOAM" fallback as being too rare, non-obvious

- minor cleanup of wmake sources

- easier to test or use different versions

- change WM_CXXFLAGS to -std=c++11 instead of -std=c++0x

- caused by the typo '@E' instead of '$E' (commit a0094dee)

ENH: minor improvements for wmake/src makefile

- 'make clean' now also tries to remove the parent platforms/
  directory if possible.

- the flex intermediate build target is placed into the platforms/
  directory to avoid touching the src/ directory at all.

- suppress warnings about unused functions (GCC only)

- makes it possible to filter out or highlight messages originating
  from wmkdep in the build process.

- new behaviour is to do nothing if no platform was specified.
  This helps avoid inadvertently removing files.

- support special platforms for compatibility with wmake/wclean targets.
  Eg, "wcleanPlatform all"

- allow use from ThirdParty top-level as well, since the directory
  structure is similar.

BUG: fix regression in wcleanLnIncludeAll introduced by 63bb0f78

STYLE: improve consistency in Allwclean scripts

- this may still need more testing, but the basic idea is to find
  directories with 'Allwclean' or 'Make' and process them (once!)

- use -name test before -type test to avoid calling stat(2) on every file.
- use -delete instead of -exec rm to avoid forking

- makes it slightly easier when packaging various binaries, or when
  building packages for installation via modules etc.

- reduces unexpected interactions between various make elements

- The dirToString -strip option is simple, but reduces effort for the caller.

- also add some comments about the side-effects

- For convenience, let "wmake some/path/filename.C"
  behave similar to    "wmake some/path"
  and trace back for the Make directory.

Patch contributed by Bruno Santos
Resolves patch request https://bugs.openfoam.org/view.php?id=2424

Eg,
    librunTimePostProcessing.so
    librunTimePostProcessing.so.7 -> librunTimePostProcessing.so.7.1.0
    librunTimePostProcessing.so.7.1.0

- centralize handling of paraview/vtk versioning into wmake/cmakeFunctions

- use "-pvMAJ.MIN" suffix for similarity with the paraview convention

- use sentinel file to ensure clean change of intermediate targets

- ensure all library files are being properly removed

Examples,

    wmakePrintBuild -plus

Check if value is known
(ie, everything configured and also OpenFOAM+):

    if wmakePrintBuild -plus >/dev/null 2>&1
    then
        echo YES
    else
        echo NO
    fi

Check if version is new enough

    if ofver=$(wmakePrintBuild -plus 2>/dev/null) && [ "$ofver" -ge 1612 ]
    then
        echo YES
    else
        echo NO
    fi

Conditionals

    ofver=$(wmakePrintBuild -plus 2>/dev/null)
    case "${ofver:=0}" in
    1612)
        echo "something for 1612
        ;;
    1706)
        echo "something for 1706
        ;;
    esac

Patch provided by Bruno Santos
Resolves patch request https://bugs.openfoam.org/view.php?id=2425

Patch contributed by Bruno Santos
Resolves bug-report https://bugs.openfoam.org/view.php?id=2408

- Could be related to interrupted builds.
  So if there are any parts of the build that rely on an explicit
  'wmakeLnInclude', make sure that the contents are properly updated.

--

ENH: improved feedback from top-level Allwmake

- Report which section (libraries, applications) is being built.

- Provide final summary of date, version, etc, which can be helpful
  for later diagnosis or record keeping.

- The -log=XXX option for Allwmake now accepts a directory name
  and automatically appends an appropriate log name.
  Eg,
      ./Allwmake -log=logs/  ->> logs/log.linux64GccDPInt32Opt

  The default name is built from the value of WM_OPTIONS.

--

BUG: shell not exiting properly in combination with -log option

- the use of 'tee' causes the shell to hang around.
  Added an explicit exit to catch this.

--

- Detecting the '-k' (-non-stop) option at the top-level Allwmake, which
  may improve robustness.

- Explicit continue-on-error for foamyM...

- now defaults to 'log.$WM_OPTIONS' (eg, log.linux64GccDPInt32Opt)
  for more clarity and fewer potential name clashes when building
  multiple versions.

- helpful when testing various builds

- slightly odd. Building CGAL on other Linux systems have a proper
  ldd dependency for gmp/mpfr, but ubuntu doesn't

- now that adios_config flags are largely working in ThirdParty

- support gperftools-none, gperftools-system configurations
  as per other third-party packages.

STYLE: clean up more environment variables

CONFIG: testing adios rule

- these directories are sometimes used for a central, non-thirdparty, non-system
  installation

- leave gmp and mpfr as is, since it is not clear how these would interact with system
  versions

when Allwmake is called from wmake -all