This allows to decode text data we receive from external process which
uses external encoding to our internal encoding.

Create a CMAKE_USE_SYSTEM_LIBRHASH option.

Port dependents to the new locations as needed.

Leave behind a cmState.h include in cmListFileCache to reduce noise. It
is removed in a following commit.

Implement cmLocalGenerator::ExpandRuleVariables in terms of the new
class for source compatibility and to reduce diff noise in this commit.

CMake has several classes which have too many responsibilities.
cmLocalGenerator is one of them.  Start to extract the link line
computation.  Create generator-specific implementations of the interface
to account for generator-specific behavior.

Unfortunately MSVC60 has different behavior to everything else and CMake
still generates makefiles for it.  Isolate it with MSVC60-specific
names.

Per-source copyright/license notice headers that spell out copyright holder
names and years are hard to maintain and often out-of-date or plain wrong.
Precise contributor information is already maintained automatically by the
version control tool.  Ultimately it is the receiver of a file who is
responsible for determining its licensing status, and per-source notices are
merely a convenience.  Therefore it is simpler and more accurate for
each source to have a generic notice of the license name and references to
more detailed information on copyright holders and full license terms.

Our `Copyright.txt` file now contains a list of Contributors whose names
appeared source-level copyright notices.  It also references version control
history for more precise information.  Therefore we no longer need to spell
out the list of Contributors in each source file notice.

Replace CMake per-source copyright/license notice headers with a short
description of the license and links to `Copyright.txt` and online information
available from "https://cmake.org/licensing".  The online URL also handles
cases of modules being copied out of our source into other projects, so we
can drop our notices about replacing links with full license text.

Run the `Utilities/Scripts/filter-notices.bash` script to perform the majority
of the replacements mechanically.  Manually fix up shebang lines and trailing
newlines in a few files.  Manually update the notices in a few files that the
script does not handle.

Stephen Kelly authored 9 years ago and Brad King committed 8 years ago

This way messages can be issued independent of the cmake instance.

It is now possible to make DisplayMessage a virtual interface and
override it to handle messages in the cmake-gui or future IDE
interaction interfaces.

Bootstrapping under MSYS2 is the same as under MSYS/MinGW except that
`uname` reports `MSYS...` instead of `MINGW...`.

Replace use of cmsys::auto_ptr with a CM_AUTO_PTR macro that maps to
our own implementation adopted from the KWSys auto_ptr implementation.
Later we may be able to map CM_AUTO_PTR to std::auto_ptr on compilers
that do not warn about it.

Automate the client site conversions:

    git grep -l auto_ptr -- Source/ | grep -v Source/kwsys/ | xargs sed -i \
      's|cmsys::auto_ptr|CM_AUTO_PTR|;s|cmsys/auto_ptr.hxx|cm_auto_ptr.hxx|'

Nicolas BUNEL authored 8 years ago and Brad King committed 8 years ago

Add a `CMAKE_BIN_DIR` cache entry to CMake's own build configuration.
Add a `--bindir` option to the `bootstrap` script to set it.

Niels Ole Salscheider authored 9 years ago and Brad King committed 9 years ago

Create a `CMAKE_XDGDATA_DIR` option and add a corresponding flag to the
`bootstrap` script.  This is needed for multiarch layouts where the
prefix is `/usr/${host}` but where architecture-independent files (like
the XDG-specific ones) are installed to `/usr/share`.

Do not activate it with the general use-system-libs options for now
because KWIML is not commonly distributed or available.

KWIML no longer uses a configured prefix.

KWSys no longer needs the cmsys/{ios,stl} directories so we no longer
populate them.  We no longer need to create them either.

Stephen Kelly authored 9 years ago and Brad King committed 9 years ago

Set a cmLocalGenerator on each instance at compute time.  That will
soon be needed to access cmGeneratorTarget instances.

If a cmExportBuildFileGenerator is processed early during configure time as a
result of CMP0024 it must be removed from the list to process later at generate
time.

The KWSys Configure.hxx header no longer needs KWSYS_STAT_HAS_ST_MTIM.
Our bootstrap-built CMake does not need to handle nanosecond precision
file times anyway.

KWSys has removed support for kwsys_ios, kwsys_stl, and pre-c++98
template compatibility layers.  Drop the bootstrap script checks for
these and configuration of the compatibility headers we no longer use.

The CMake bootstrap process uses Makefile generators so there is no
need to build the Ninja generators during bootstrap.

Provide a place to move functionality common to both.

The Convert methods never belonged to the local generator concept, so
split them out now.  The cmOutputConverter is cheap to construct and
destroy, so it can be instantiated where needed to perform
conversions.  This will allow further decoupling of cmLocalGenerator
from the configure step.

Inherit cmLocalGenerator from cmOutputConverter for the purpose of
source compatibility.

Create a SPHINX_FLAGS cache entry that users can populate with
command-line flags for sphinx-build.  Add an option to the
bootstrap script to populate it up front.

Suggested-by: Felix Geyer <debfx@ubuntu.com>

These cache entries should be generated with type BOOL, not FILEPATH.

Stephen Kelly authored 9 years ago and Brad King committed 9 years ago

At this point, it is an interface to the cache.  It will be extended
to be a universal interface for access to and manipulation of
configuration-time data (defintions, properties on targets,
directories, source files etc).

This will allow porting all command implementations away
from the cmMakefile and cmTarget classes, and result in something
more-purely related to configuration-time processing of cmake
commands.  That should serve at least the following goals:

 * Split the CMake implementation more definitively into three
   stages: Configuration, computation and generation, and be able to
   implement each optimally for memory access patterns etc.
 * Make better IDE integration possible by making more configuration
   data available.
 * Make it possiblte to use a smaller library than CMakeLib.a in
   cpack and ctest, resulting in smaller executables.
 * Make it possible to run the configure step multiple times in
   the same CMake run (#14539).

Manage its lifetime in the cmake class, and add a convenience accessor
to cmMakefile.