Add replacement simple push/pop in the other two callers of
ReadListFile.

Get it from the Makefile instead.

Simplify the ReadListFileInternal API.

The latter is predefined by Windows toolchains and is more reliable.
Reported-by: Michael Stürmer <michael.stuermer@schaeffler.com>

Bill Hoffman authored Jun 04, 2015 and Brad King committed Jun 15, 2015

Create a <LANG>_COMPILER_LAUNCHER target property (initialized by a
CMAKE_<LANG>_COMPILER_LAUNCHER variable) to specify a compiler launcher
tool.  This will supersede the CMAKE_<LANG>_COMPILER_ARG1 approach to
using such tools.  The old approach set CMAKE_<LANG>_COMPILER to the
launcher tool while the new approach leaves this variable set to the
actual compiler.

Implement this property for Makefile and Ninja generators.  It cannot be
implemented for VS or Xcode generators as the IDE build tools offer no
such hooks.

Fix generation of tgt/fast build targets.

Commit 363caa2f (cmLocalGenerator: De-virtualize Configure().,
2015-05-30) moved the computation of HomeRelativeOutputPath from
Configure-time to Generate-time, because it is only used at
Generate-time.  However, that commit caused the member for one
local generator to be computed immediately before generating with
that local generator, whereas previously the members of all local
generators were computed before generating any of them.

The HomeRelativeOutputPath is used by the GetRelativeTargetDirectory
method, which is called by the
cmGlobalUnixMakefileGenerator3::WriteConvenienceRules method.  That
method is called by the
cmLocalUnixMakefileGenerator3::WriteLocalMakefile method when generating
for the top-most (ie, the first) local generator.  At that point,
the HomeRelativeOutputPath is not yet computed.

Fix that by computing the member just before generating anything.
This will eventually be done in the cmLocalUnixMakefileGenerator3
constructor instead, but further refactoring is needed to make
that possible.

The VS >= 10 generators need to parse the .sln file from the build
directory to locate targets in subdirectories.  This occurs after we
change the working directory to the build tree.  If a relative directory
other than "." was given then we would change to it and also refer to
the .sln file location with it.  Fix this by converting the build tree
to a full path always.  This will also give a more informative error
message when the directory does not exist.

Make RETURN_VALUE report -1 if the update command failed as the
documentation claims.  Also avoid reporting a ctest script-level failure
if the update command fails because we still correctly administered the
update step.

Call the cmMakefile implementation directly.  This is a configure-time
construct.

Don't pay a penalty for it in all GetProperty calls.

Additionally, the storage of properties will eventually move to
cmState, which should only contain state and not logic for policies
like this.

In ctest -S mode we load the CTestScriptMode module to give the
configuration scripts access to the host system information.
CYGWIN.cmake warns unless we explicitly tell it not to warn
since there is no chance for a cmake_minimum_required(VERSION)
to be called.

Clinton Stimpson authored Jun 08, 2015 and Brad King committed Jun 08, 2015

This will allow users to cut-n-paste the instructions over to a command
prompt.