CTest: Add test for running many tests in parallel

In particular, this checks that CTest's use of select() has a sufficient
file descriptor set size limit (FD_SETSIZE) to handle many child
processes at the same time.  Running 20 tests requires more than 64
descriptors, the Cygwin default that we override.
Add support for componentized USER spec file

CPACK_RPM_USER_BINARY_SPECFILE can now be specified on a per-component
basis using CPACK_RPM_<componentName>_USER_BINARY_SPECFILE.

Inspired-By: Theodore Papadopoulo with its patch proposal.
CPackRPM add mechanism to remove path from generated list of file in RPM spec.

This fixes bug #0013609, and is a possible solution to #0012864 as well.
The later will be completely fixed in another way. Both approaches
needs to be implemented because the current one is more automatic.

Inspired-By: Ari
CPackRPM add /usr/lib64 to the list of builtin to-be-excluded path
VS: Separate compiler and linker PDB files (#11899, #14062)

The MS tools create two types of PDB files as explained here:

 http://msdn.microsoft.com/en-us/library/yd4f8bd1%28v=vs.71%29.aspx
 http://msdn.microsoft.com/en-us/library/yd4f8bd1%28v=vs.80%29.aspx
 http://msdn.microsoft.com/en-us/library/yd4f8bd1%28v=vs.90%29.aspx
 http://msdn.microsoft.com/en-us/library/yd4f8bd1%28v=vs.100%29.aspx

One is created by the compiler (/Fd) and the other by the linker (/pdb).
The two options should not specify the same file.  Split them up.

In the VS IDE generators, simply drop ProgramDataBaseFileName to
take the VS default "/Fd$(IntDir)vc$(PlatformToolsetVersion).pdb".

In the Makefile generators, set "/Fd" on the compile line to be
the directory containing object files (with a trailing slash the
compiler will add the "vc$(PlatformToolsetVersion).pdb" filename
automatically).  Drop the /Fd option from the exe link command
line and add "/pdb" instead (already done for dll linking).
Update these rules for both MSVC and Intel tools.

Drop support for PDB_OUTPUT_DIRECTORY and PDB_NAME in STATIC
libraries because the generated .pdb files are only from /Fd
and not real linker-generated .pdb files.  Update documentation to
clarify that the PDB_* properties are only for linker .pdb files.

This regresses the PDBDirectoryAndName test for STATIC libraries.
Since it is not clear at this time what should be done for STATIC
library .pdb files, comment out the relevant portion of the test
and leave a TODO comment.
MSVC: Invoke 'link' directly for executables

Update the CMAKE_<LANG>_LINK_EXECUTABLE rule variable to invoke the
linker directly instead of through the compiler.  We already do this
for DLL linking with CMAKE_<LANG>_CREATE_SHARED_LIBRARY.

This also works around a VS 6 cl bug.  While invoking the link tool
internally it fails to correctly quote flags like /pdb:... with spaces
in the value.
Ninja: Fix OBJECT_DIR placeholder path conversion

Transform the path using ConvertToNinjaPath just as we do for all other
paths.  This fixes the OutOfSource test for objects in the ../OutOfBinary
directory by computing the proper full path for the /Fd option.
VS 10: Escape ; as %3B in preprocessor definitions (#14073)

Use the suggestion from http://support.microsoft.com/kb/2262855 to escape
semicolons in preprocessor definitions for VS >= 10.  Update the
COMPILE_DEFINITIONS documentation disclaimer list of known limitations
accordingly.  Update our "Preprocess" test to cover the case.

Suggested-by: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>
FindOpenSSL: Fix spelling of CMAKE_CROSSCOMPILING (#14075)

Use of the mis-spelled variable name 'CMAKE_CROSS_COMPILING' was
introduced by commit 4b793ad1 (FindOpenSSL: find cross-compiled OpenSSL
from MinGW, 2012-07-23).  Fix the spelling.
Add projectDir parameter to GenerateBuildCommand

Extend the cmGlobalGenerator::GenerateBuildCommand virtual method
signature with a "projectDir" parameter specifying the top of the
project build tree for which the build command will be generated.
Populate it from call sites in cmGlobalGenerator::Build where a
fully-generated build tree should be available.
VS: Create parser for Visual Studio .sln files

Create class cmVisualStudioSlnParser as a generic parser for Visual
Studio .sln files. Implement minimum functionality but keep class
extensible.  Add tests for the class.
VS: Use .sln parser to build targets in subdirs with msbuild (#13623)

Use cmVisualStudioSlnParser in GenerateBuildCommand() to provide correct
command line for MSBuild even when target project is stored in a
subdirectory.
VS: Add test for building MSBuild project in subdir

Add test covering cmGlobalGenerator::GenerateBuildCommand for VS
solutions with MSBuild and building a target defined in a subdirectory
and not part of ALL.
CTest: Simplify ctest_* command source/build dir lookup

In cmCTestHandlerCommand::InitialPass call InitializeHandler after setting
the CTest "SourceDirectory" and "BuildDirectory" configuration values
instead of before.  This makes the values available to InitializeHandler
methods in subclasses, so also drop the duplicate configuration of those
values from cmCTestConfigureCommand::InitializeHandler.
ctest_build: Pass projectDir to GenerateBuildCommand

This allows the ctest_build command's TARGET option to name a target
in a subdirectory and still build properly with msbuild.
Add test case covering use of ctest_build() with such a TARGET.
Fix some copyastos in the DetermineRCCompiler file.
CMakeSystem: include toolchain file after setting CMAKE_HOST_ (#13796)

Make the CMAKE_HOST_* variables always available in the toolchain file.
They are when the file is included in CMakeDetermineSystem.cmake, and
now also here.  For the non-cross-compiling case this does not change
anything at all.

Alex
Add support files for C, C++ and ASM for the IAR toolchain.

The original feature request is at http://www.cmake.org/Bug/view.php?id=10176
Documentation can be found at http://www.iar.com/website1/1.0.1.0/675/1/

Alex
Add regexps for the IAR toolchain to the vendor list.

The IAR compilers produce object files where the plain strings at least
sometimes can't be found, see:

  http://www.cmake.org/Bug/view.php?id=10176#c19598

Alex
Add IAR to the CMakeDetectC(XX)CompilerID.c(pp).in

With the AVR IAR compiler this can't be found, but it works e.g. for the
ARM AVR compiler.

Alex