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These compilers warn and return 0 for unrecognized flags.  We fix the
compiler flag check macros by looking for a warning in the output.  We
also update the regex for GNU on older Macs.  See issue #9516.

This compiler warns and returns 0 for unrecognized flags.  We fix the
compiler flag check macros by looking for a warning in the output.
See issue #9516.

This teaches the TryCompile test to check that the compiler flag check
macros correctly reject a bad flag.  See issue #9516.

These compilers warn and return 0 for unrecognized flags.  We fix the
compiler flag check macros by looking for a warning in the output.
See issue #9516.

This teaches the CHECK_C_SOURCE_COMPILES and CHECK_CXX_SOURCE_COMPILES
macros to recognize a FAIL_REGEX option.  If they see the regular
expression in the output of the test compilation, the check fails.

This commit improves formatting and style of the documentation for the
general-purpose compiler check macros:

  CHECK_C_COMPILER_FLAG
  CHECK_C_SOURCE_COMPILES
  CHECK_C_SOURCE_RUNS
  CHECK_CXX_COMPILER_FLAG
  CHECK_CXX_SOURCE_COMPILES
  CHECK_CXX_SOURCE_RUNS

This sytle is more consistent with CMake command documentation.
It also looks nicer in the generated documentation text files.

Alex

Fix for bug #9466.  Change the implementation of OSX arch lists.  If no ARCHs are specified by the user then no flags are set.   We no longer use CMAKE_OSX_ARCHITECTURES_DEFAULT.

Some vendor tools convert PDB file names given on the command line to
lower-case before creating the file.  When CMake places a mixed-case PDB
file name into the build system, the file does not exist the first time
and it is written with mixed case.  After the first build though the
native tool has created a lower-case version of the file.  If CMake does
CollapseFullPath again, the file exists so the actual-case lookup gets
the lower-case name.  This causes the build files to change so the
project rebuilds.

The solution is to avoid calling CollapseFullPath for files generated by
the build.  In the case of PDB files we already construct them from
paths that have been collapsed, so we can just skip the call altogether.
See issue #9350.

In cmMakefile::AddSubDirectory we were checking for addition of the same
source directory multiple times.  However, the check code was incorrect
because it compared pointers instetad of pointed-to strings.  Since the
check was written, a better check was added right after it to enforce
unique binary directories (in which case duplicate sources are fine).
This commit simply removes the old-style check code.

Before this change all targets were displayed in the top level directory of
the project. Now the targets are displayed in the correct directory.
The targets "clean" and "all" are now created in every subdirectory.
Also now the targets for just compiling one file, preprocessing one file,
assembling one file are are created for Eclipse.
Additionally all targets get a prefix now in eclipse, so that they are
sorted in a way which makes sense (global targets first, then executable and
libraries, then object files, then preprocessed, then assembly). Also
this prefix gives the user a hint what the target is, i.e. whether it's a
library or an executable or something else.

Alex

This test checks that configure_file() handles input and output file
arguments as documented.

This commit teaches configure_file how to handle directories for input
and output.  It is an error if the input is a directory.  If the output
is a directory we put the configured copy of the input file in it with
the same name.  See issue #9537.

The configure_file() command now converts relative output paths to full
paths using the current binary directory.  Input relative paths were
already converted using the current source directory, but this behavior
was not previously documented.

Rename 'OuputFile' to 'OutputFile'.

The CMake.File test runs several scripts through "cmake -P" and checks
the output and result against known good values.  This commit factors
out the checking code into a separate CMakeCheckTest module.  The module
may be used by new tests.

Now gcc is queried also for the builtin definitions, and they are then added
to the .cproject file. This should make the preprocessor highlighting in
eclipse work better (#9272)
Patch mostly from Miguel.

Alex

In Platform/Linux.cmake we add GNU flags as default for the platform
which breaks non-GNU compilers.  Later we should refactor these flag
files to put compiler-specific flags only in files loaded for each
compiler.  Until then this commit fixes the XL C++ compiler flags on
Linux by erasing the GNU flags.  See issue #9469.

The Intel Visual Fortran compiler plugin for MS Visual Studio may be one
of several versions of the Intel compiler.  This commit teaches CMake to
detect the plugin version and set the version number in .vfproj files.
See issue #9169.

This method returns the registry key

  HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\<version>

A protected GetIDEVersion method retrieves the version-specific part of
the key name.

This commit teaches the FunctionTest to check variable scope behavior
when a subdirectory is added inside a function call.  Any PARENT_SCOPE
sets in the subdirectory should affect only the function scope which
called add_subdirectory and not its parent scope.

The commit "Improve dynamic variable scope implementation" optimized
function scopes using an efficient parent scope pointer.  However, the
parent scope used to initialize a new directory might not exist later
(like add_subdirectory called inside a function of the parent scope).
This caused CMake to crash when following the dangling pointer to the
original parent scope.

We fix the problem in this commit by always computing the closure of the
parent scope at directory initialization time so that no parent scope
pointer is needed.  See issue #9538.

Fix for bug #8969, pick a better default version for VS, and make it easier to add new versions of VS to look for.

Alex

Fix for Bug #9190, -U did not work on case insensitive file systems because of call to glob convert to regex that expected to work with files.