Patch from Chuck Atkins <chuck.atkins@kitware.com>

Patch from Chuck Atkins <chuck.atkins@kitware.com>

Patch to avoid short name usage where possible. Get the actual case spelling of a file name on 'Windows' without converting to short name and back again. Avoids bad behavior reported in http://bugs.winehq.org/show_bug.cgi?id=22286 when using cmake under a wine/msys/mingw installation on a Linux box. Thanks to Clinton Stimpson for preparing the patch.

Teach kwsysProcessKill to identify processes on this platform using the "ps"
command just as on Linux.  Patch from Modestas Vainius <modax@debian.org>.
See issue #10432.

In commit 'Create KWSYS_PLATFORM_INFO_TEST macro' (2009-11-20) we
implemented the macro to use a cache entry to avoid re-running the
try_compile().  However, the output copied from the try_compile is
needed on every configure.  If the user wipes out the build tree but not
the cache file then the try_compile() will not re-run to recreate the
needed file.  We address the problem by teaching the macro to run the
try_compile() whenever its output file does not exist.

This CVS keyword was copied into the file with the rest of the
implementation.  It has no meaning outside its original project tree.

COMP: remove exporting String as VS10 attempts to export its parents (basic_string) which causes all kinds of multiply defined symbols at link time.

When building on Cygwin without -mwin32, the _WIN32 macro may not be
defined.  SharedForward must still set the PATH environment variable to
ensure runtime dependencies are found.

The 'ldd' wrapping feature uses 'cygcheck' for now since a real ldd tool
is not available in Cygwin 1.5.  We can change to use the real ldd when
we choose to stop supporting legacy Cygwin and require 1.7.

Open output files with mode 0666 so that permissions are not more strict
than umask permits.  See issue #10126.

When kwsys is built using GCC visibility support can be used. This is similar
to the way that Windows exports symbols in DLLs, and requires projects that
build kwsys to change the default visibility using some compiler flags. See
http://gcc.gnu.org/wiki/Visibility for more details about GCC visibility.

The SharedForward header contains a preprocessor table mapping from
platform to equivalents for ldd and LD_LIBRARY_PATH.  This commit fixes
the table preprocessor directives to guarantee at most one platform.
This generalizes the commit "Fix compilation of VTK on debian/sparc".

The TestSharedForward executable and TestDynload module do not actually
link to a KWSys library, but it is nice to build them after the
libraries just like all other test binaries.

This also works around a universal binary bug in Xcode 2.x.  It forgets
to create the output directory for the executable before linking it.  We
avoid the problem by putting the library in the directory first.

Add fallback for detecting CPU speed from Windows registry on builds where USE_ASM_INSTRUCTIONS gets defined to 0. (Win64 builds.) Clean up methods to return false when not implemented or when they fail to detect the things they're supposed to detect. This file still needs a lot more work to have a fully working implementation on Win64 builds. Committing it now because it's slightly better than it was, and there is a need for the CPU speed detection code in projects that depend on kwsys. Will file a bug shortly to request that the missing implementations get filled in...

KWSys should not set variables outside its namespace.  It can honor the
EXECUTABLE_OUTPUT_PATH set by a host project, but tere is no need for it
to set a default in the host project cache.

In order to kill process trees we need to list all processes to find
those whose parent we are killing.  We implement process listing on
OpenSolaris by using "ps -ef" and parsing the resulting format:

     UID   PID  PPID   C    STIME TTY         TIME CMD
     %*s    %d    %d   %*[^\n]\n

In order to kill process trees we need to list all processes to find
those whose parent we are killing.  We implement process listing on QNX
using "ps -Af" and parsing the resulting format:

  UID        PID       PPID  C STIME TTY          TIME CMD
  %*d         %d         %d  %*[^\n]\n

We enumerate processes to identify those whose parent is being killed so
that we can recursively kill the children.  Enumeration uses the
Process32(First|Next) windows API functions, which accept PROCESSENTRY32
objects to be filled.  This commit corrects the declaration of the entry
structure to account for its size on 64-bit Windows.

On UNIX systems we kill a tree of processes by performing a DFS walk of
the tree.  We send SIGSTOP to each process encountered, recursively
handle its children, and then send SIGKILL.

We once used the above approach in the past, but it was removed by the
commit "Do not send both SIGSTOP and SIGKILL when killing a process".
The commit was meant to work-around an OS X 10.3 bug in which the child
would not always honor SIGKILL after SIGSTOP.  At the time we wrongly
assumed that the process tree remains intact after SIGKILL and before
the child is reaped.  In fact the grandchildren may be re-parented to
ppid=1 even before the child is reaped, which causes the DFS walk to
miss them.

Mac has gettimeofday defined, but cmsys wasn't aware of that, so it was falling back to using time() which only provides second resolution.  Fixed to allow usec res.

We suppress Intel warning 1572 because the cases where we do equality
tests are valid.  Since this project does not do numerical computations
we need not worry about real instances against which this warning
protects.

Under -O3 optimization this compiler breaks our testProcess.c source file.
We force -O0 for the file to avoid the problem.

The commit "Enable loose loop constructs in KWSys" set the minimum
required CMake version to 2.4.5.  This regressed the setting of CMP0003,
so we restore it in this commit.

The FundamentalType header needs to know type sizes at preprocessing
time.  This commit teaches it to avoid using CHECK_TYPE_SIZE because the
macro does not work for types whose size varies across architectuers in
Mac OS X universal binaries.  Fortunately the Mac compilers provide just
enough information to detect the needed type sizes during preprocessing.

We now use preprocessor macros instead of configuration tests whenever
they are available.  As a side effect this reduces the number of
try-compiles needed with GCC.

See issue #9913.

This macro helps KWSys perform try-compile tests that extract 'INFO'
strings out of compiled binaries.  It works for CMake 2.6 and above.
On CMake 2.4 it always returns an empty list of information values,
so this should be used only as an optimization until 2.6 is required.

In KWSys IOStream we need to detect whether 'long long' exists but we do
not need its size.  We avoid using CHECK_TYPE_SIZE because it does not
work for types whose size varies across architectuers in Mac OS X
universal binaries.  See issue #9913.

We set CMAKE_ALLOW_LOOSE_LOOP_CONSTRUCTS in KWSys's CMakeLists.txt file
to enable simpler endif() syntax for CMake 2.4.

Fix bogus calls to GetMemoryStatus and GetMemoryStatusEx: need to set the dwLength member of the struct prior to calling. Otherwise it's just a garbage value from the stack. Also, pay attention to return value of GetMemoryStatusEx: if it indicates failure then just return 0 without using any of the other data the call returns.

      were changed from "unsigned long" to "size_t" to solve warnings about
      64 bits to 32 bits truncations.

      truncate 64 bits types into 32 bits types.

Alex

Better fix for crash on Windows. This time it will even work on Linux, too. That GetLineFromStream method while loop sure is fussy.

Fix crash on Windows. If input stream is no good, do not try to read a line from it. Return false and an empty line instead...