Add a test to expose a bug with add_custom_command and ninja.

Ninja Generator is unable to handle an add_custom_command having
a dependency that is generated at build time by a previous target.
CMake Nightly Date Stamp
Document ENV syntax as a "variable" (#14245)

Although "ENV" is not a special variable itself, use it to document
the $ENV{VAR} syntax.
Merge topic 'COMPILER_TARGET'

2d9ec1d Add compiler target compile options.
Merge topic 'export-COMPILE_OPTIONS-property'

77ff352 Generate INTERFACE_COMPILE_OPTIONS on export.
Merge topic 'version-compare-genex'

e605528 Add generator expressions for version comparision.
48bb48e De-duplicate version comparison code.
Merge topic 'FindFreetype-gtkmm'

a34839d FindFreetype: Detect Freetype installed by GtkMM installer for win
Merge topic 'dag-LINKER_LANGUAGE'

ff015ee Genex: Report error if a target file is needed to evaluate link libraries.
b58aff9 Genex: Extend EvaluatingLinkLibraries to also check the top target name.
b1c19ce Genex: Make LINK_LANGUAGE report an error when evaluating link libraries.
0e1cb07 Add missing return after error report.
KWSys 2013-06-24 (3d1d4e7c)

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ 3d1d4e7c | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' d79a792e..3d1d4e7c
Cory Quammen (1):
      3d1d4e7c SystemTools: MakeDirectory() reports failure if path is file

Change-Id: I080ed62630304c63c65efaf4be08198a6411ae48
Merge branch 'upstream-kwsys' into update-kwsys
cmDependsC: Collapse relative include paths

While calculating dependencies collapse sequences such as

 ../../../a/b/c/../../d/e/../../e/f

to avoid total path lengths over the Windows path length limit as much
as possible.
CMake Nightly Date Stamp
Embarcadero: Use response files only for includes, objects, and libs

Leave other flags directly in the Makefile command lines and outside
any special inline response file syntax.  Otherwise Borland does
not support flags with quotes in response files.
Escape target flags taken from COMPILE_OPTIONS

Factor appending of individual flags out into an AppendFlagEscape method
in cmLocalGenerator and teach it to use EscapeForShell.  Update all
COMPILE_OPTIONS handling to use AppendFlagEscape.

Override the method in the Xcode generator to use its custom escape
implementation.

Teach the CompileOptions test to add an option that requires escaping
everywhere instead of just with the GNU tools.
Refactor target COMPILE_OPTIONS and COMPILE_FLAGS handling

Replace the cmLocalGenerator GetCompileOptions method with an
AddCompileOptions method since all call sites of the former simply
append the result to a flags string anyway.

Add a "lang" argument to AddCompileOptions and move the
CMAKE_<LANG>_FLAGS_REGEX filter into it.  Move the call sites in each
generator to a location that has both the language and configuration
available.  In the Makefile generator this also moves the flags from
build.make to flags.make where they belong.
cmcurl: Backport curl bug 1192 fix (#14250)

LLVM headers define strlcat as a macro rather than as a function.
See upstream Curl issue:

 http://curl.haxx.se/bug/view.cgi?id=1192

It was addressed by removing use of strlcat altogether.  Port the
upstream fix to CMake's curl.
CMake Nightly Date Stamp
Add generator expressions for compiler versions.

New generator expressions allow retrieval of the version per language,
as well as equality comparison.
Split the GeneratorExpression test into a third part.

Avoid command lines beyond NMake limits.

 http://open.cdash.org/testDetails.php?test=196577461&build=2949683
 expanded command line '...' too long
Merge topic 'doc-ENV-syntax'

c293e05 Document ENV syntax as a "variable" (#14245)