Patch contributed by Bruno Santos
Resolved bug-report http://www.openfoam.org/mantisbt/view.php?id=2042

wmake/src/Makefile: Override WM_COMPILE_OPTION with Opt for optimized compilation of the wmake utilities
Resolves bug-report http://openfoam.org/mantisbt/view.php?id=2021

Patch provided by Bruno Santos
Resolved bug-report http://www.openfoam.org/mantisbt/view.php?id=2016

which may be optionally overridden by version-specific rules.

For example the default rules for gcc on GNU/Linux x86_64 are in the
wmake/rules/linux64Gcc directory.  If there is a need to change any of
the rules for a specific version of gcc, e.g. gcc-4.8.4 the directory
wmake/rules/linux64Gcc48 may be created into which any of the language
files may be provided containing the rules to override the defaults.

The c++0x is used rather than c++11 to support gcc-4.5.?

The Makefiles are now in the makefiles sub-directory

The "-f | -force" option in wmakeLnInclude is now "-u | -update" for
consistency with the other scripts.

The "Usage" entry in the headers is now consistently formatted in all
scripts.

wcleanPlatform is a more general and cleaner version of wcleanMachine
supporting the "-all" option to provide the equivalent of wcleanAll.

Both wcleanMachine and wcleanAll are now deprecated and will be removed
for the next major release.

Legacy script which is no longer used

Updates lnInclude directories and dep files before compilation.  This is
useful to apply following a "git pull" to ensure consistency between the
source files, dep files and links.

Searches all the "src" and "application" directories of the project for
broken symbolic links for source code files and then remove all .dep
files that relate to the files that no longer exist.  Must be executed
in main project source code folder: $WM_PROJECT_DIR

Patch provided by Bruno Santos

Resolves feature-request http://www.openfoam.org/mantisbt/view.php?id=1941

It will exit after removing the empty folders and it will not do the
other standard "wclean" operations.  This replaces the functionality
provided by "wrmdepold".

Patch provided by Bruno Santos

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1846

Patch provided by Bruno Santos
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1846

This resolves a whole range of issues and work-arounds with earlier
releases.  This version of icpc is more or less compatible with the
latest gcc and clang compilers and only required one hack to avoid
warnings from PackedBoolList.H.

Also removed __GNUC__ conditional compilation statements which are no
longer needed.

Resolves feature request http://www.openfoam.org/mantisbt/view.php?id=1759

On 32bit OSs long is not unambiguously int32_t (or int64_t) causing
problems for IO operator resolution.  This problem is avoided by
explicitly defining the following operators:

Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1573

Provided by Bruno Santos
Also some general cleaning and update of comment.
Resolves bug-report http://www.openfoam.org/mantisbt/view.php?id=1167

Tested with snapshot gcc-5-20150215.tar.bz2