Add FindBacktrace.cmake module.

It designed to search for implementation of backtrace(3) routine.
Currently it is used in OpenBSD Ports for building Clementine
music player.

A lot of input from brad.king@ and neundorf@.
FindLATEX: Find ps2pdf with MikTeX.
cmGlobalGenerator: Rename the FinalizeCompileDefinitions method.

This will soon also finalize include directories.
cmTarget: Don't finalize include directories in GetIncludeDirectories.

Rely on that having been done by the cmGlobalGenerator.
Make accessors for compile-related information const.

These can be moved to cmGeneratorTarget in CMake 4.0.
Refactor internal resource location APIs and initialization

Rename cmSystemTools::FindExecutableDirectory to FindCMakeResources.
Teach it to compute the locations of cmake, ctest, cpack, ccmake, and
cmake-gui executables, and the location of CMAKE_ROOT.  Provide this
information from static cmSystemTools::Get<resource>() methods.
Refactor code that needs these locations to use the new APIs.

Teach FindCMakeResources to use the OS X system API to lookup the
executable location.  When running from the CMake build tree itself,
leave a file in the tree that FindCMakeResources can use to read the
location of the source tree.  This avoids the need to compile the source
tree location into a binary that may be installed and used without the
source tree.

Teach the QtDialog on OS X to create a "cmake-gui" symlink in the build
tree next to "cmake" and the other tools, as is already done in the
install tree for the application bundle.  This ensures a consistent set
of executables are available in one directory.
CMake Nightly Date Stamp
Merge topic 'cmake-internal-locations' into next

6f9e553 Refactor internal resource location APIs and initialization
Help: Add cmake-language.7 manual
Help: Reference cmake-language.7 comment docs from cmake-developer.7

The cmake-language.7 manual now documents comment syntax.  Reference it
from cmake-developer.7 when discussing how to add comment-enclosed
documentation to modules.
Merge topic 'doc-cmake-language' into next

79fd233 Help: Reference cmake-language.7 comment docs from cmake-developer.7
a931ee4 Help: Add cmake-language.7 manual
4d76bcc CMake Nightly Date Stamp
cmExportSetMap: Override clear() to delete held resources

Replace the std::map<>::clear() method with one that first deletes
the cmExportSet instances held by each map entry, and then clears.
Otherwise the cmGlobalGenerator::ClearGeneratorMembers added by
commit 5cf1120f (cmGlobalGenerator: Refactor member cleanup between
configures, 2013-11-04) leaks the cmExportSet instances.
Merge topic 'clear-generator-data' into next

00055ce cmExportSetMap: Override clear() to delete held resources
cmSystemTools: Fix _NSGetExecutablePath calls on OS X 10.3

The buffer size argument is a different type on OS X 10.3 versus
OS X 10.4 and later.  Choose the type based on the OS X version.

While at it, use a local macro to avoid duplicating the local buffer
length.
Merge topic 'cmake-internal-locations' into next

328421f cmSystemTools: Fix _NSGetExecutablePath calls on OS X 10.3
Merge topic 'doc-execute_process'

3bb6266 Help: Clarify execute_process COMMAND argument behavior
ea6b656 Help: Format execute_process command documentation
Merge topic 'doc-cmake-language'

79fd233 Help: Reference cmake-language.7 comment docs from cmake-developer.7
a931ee4 Help: Add cmake-language.7 manual
Merge topic 'tll-target-policies'

596b2a8 Disallow linking to utility targets (#13902).
301bb5c Disallow link-to-self (#13947).
05f5fde Disallow invalid target names (#13140)
Merge topic 'test-LINK_ONLY-expression'

53b10fd Genex: Add a test for the LINK_ONLY expression.
Merge branch 'master' into next