STYLE:Empty commit just add information about rev 1.15: the reason is that long is 64-bit on gcc on Linux because it uses the LP64 data model whereas long is 32-bit on VS 64-bit because it uses the LLP64 model (ref: http://en.wikipedia.org/wiki/64-bit#64-bit_data_models )

COMP:Fix warning on VS 64bit. Don't why gcc 4.3.2 didn't catch this one on a 64bit machine with -Wconversion on.

COMP:Fixed gcc 4.3.2 warning with -O1 and above: ignoring return value of read'), declared with attribute warn_unused_result

This provides an API for parent projects to use to specify values to be
set in the LABELS properties of KWSys libraries, executables, and tests.

This adds the configured KWSys header files to the library targets that
implement their APIs so that they show up in IDE project files.

On Windows the GetLongPathName API function does not work on some
filesystems even if the file exists.  In this case we should just use
the original long path name and not the GetShortPathName result.
See issue #8480.

This patch from Philip Lowman teaches SystemTools::GetRealPath to deal
with paths that do not exist by dealing with the case that realpath
returns NULL.  See issue #8423.

The test is supposed to terminate quickly when its child crashes, but
that seems to take over 10s on busy systems.  This extends the test's
timeout to 30s to help it pass when running on a busy system.

On Windows the KWSys System package generates escapes for command-line
arguments.  This fix enables quoting of the empty string as an argument.
This also adds a test to pass an empty argument to a custom command.

BUG: Do not copy permissions of files when making the copy in an install rule. If the source file was read-only, this prevents the subsequent set of the destination file's modification time, making the copied file always different in time-stamp than the original and always installing a new file with a new time stamp (but the same content) causing unnecessary downstream incremental rebuilds. As part of this fix, add an optional copyPermissions parameter to the SystemTools routines CopyFileIfDifferent, CopyFileAlways, CopyAFile and CopyADirectory. The copyPermissions parameter defaults to true to preserve the behavior of these routines for existing callers.

The SystemInformation component of KWSys requires Process and
FundamentalType.

KWSys component dependencies must be enforced before any tests for
enabled components are done.  This moves the dependency enforcement code
to be as early as possible.

See issue #7797.

In SharedForward, the call to execvp warned on MinGW because the
signature declared in process.h has an extra const.  We use an explicit
cast to convert the pointer type.

This tests the basic capability of running another executable from the
build tree.

The windows execvp function does not re-escape arguments correctly.
Instead we generate the escape sequences before calling it.

To detect when the launcher is running from the build tree we now test
if the directory containing it is the same as the build-tree directory
using an inode test instead of string comparison.  This makes it more
robust on case-insensitive filesystems and other quirky situations.

In SharedForward we are only dealing with command-line-length strings so we
need not worry about integer overflow.

ENH: Improve FILE GLOB_RECURSE handling of symlinks with a new CMake policy. CMP0009 establishes NEW default behavior of not recursing through symlinks. OLD default behavior or explicit FOLLOW_SYMLINKS argument to FILE GLOB_RECURSE will still recurse through symlinks.