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This refactors a std::vector<std::string> into a class so that
we can extend the features to represent things such as multiple
chained commands in the future.

3d63d3ce Help: Add examples to CheckFortranSource{Runs,Compiles}
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2843

f2d7ed1c Help: Add note about CMAKE_ROLE to FindGit documentation
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2847

e4541b0e FindPython: Support script mode
8ef1916c FindPython: Test existence of imported targets
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2844

Fixes: #18827

5a0784dd clang-tidy: Pass by value
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2836

405d9cb4 Merge branch 'upstream-KWSys' into update-kwsys
3068a0d0 KWSys 2019-01-22 (4fecfe6f)
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2833

2993fc34 cmMakefile: GetModulesFile() accepts std::string param
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2838

f2fca926 cmake: --build supports '-jN'
e463133c Tests: Remove unused files from RunCMake.CommandLine test
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2819

20861d75 Merge branch 'backport-cmake-warn-no-src-build-dir'
68b51fb1 cmake: Convert no source/build dir error to warning
6b85eea3 Help: Add 3.13.4 release note for no source/build dir error/warning
2395b1b2 cmake: Convert no source/build dir error to warning
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2839

Merge-request: !2839

Temporarily restore previous behavior that allowed specifying
no source or build directory to work, even though it was
neither documented nor supported. This commit is expected
to eventually be reverted to restore the fatal error for such
cases.

Relates: #18817

5990ecb7 Compute implicit include directories from compiler output
d751d2d2 CMakeDetermineCompilerABI: set locale to C for try_compile()
c765ae49 CMakeDetermineCompilerABI: pass verbose flag during compilation
8c5221fb try_compile: Preserve special characters in COMPILE_DEFINITIONS
15ad8300 Refactor exclusion of -I/usr/include to avoid per-language values
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2716

dfd5ae7d Help: Mark default CMake generator with asterisk
6023fe7f ccmake: Append rather than replace Generators section of docs
7408cd39 cmake: Return generator docs directly
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2682

* upstream-KWSys:
  KWSys 2019-01-22 (4fecfe6f)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 4fecfe6f29be07ec165bcc87a20666425d928aa6 (master).

Upstream Shortlog
-----------------

Brad King (1):
      7a5e5af8 SystemTools: Revert "Fix FileIsSymlink with Windows data deduplication"

Tobias Kloss (1):
      ef373416 SystemTools: Fix FileIsSymlink with Windows data deduplication

Wouter Klouwen (1):
      8e9970fb SystemInformation: support BSD platforms for GetProcessId

ab3b549e CROSSCOMPILING_EMULATOR: Fix test generation for empty value
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2834

97700e9f FindGit: Add imported target
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2790

5ff7fb59 Fixed all but one clang -Wcomma warning
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2828

3132ea80 cmSystemTools: Stdout(),Stderr() accept std::string argument
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2829

2c50a725 cmDepends: all members accept std::string arguments
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2827

67bced8a cmake-gui: Improve label for default platform
48ec0bc1 cmake-gui: Add field for generator platform selection
8bba458e Add global generator factory method to get default platform name
818df52c Add global generator factory method to get list of known platforms
8144b00e Split global generator factory list with and without platforms
b70c0aed VS: Factor out helper function to compute host platform name
Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !2832

Drop `-stderr.txt` files for cases that do not exist.

Temporarily restore previous behavior that allowed specifying
no source or build directory to work, even though it was
neither documented nor supported. This commit is expected
to eventually be reverted to restore the fatal error for such
cases.

Relates: #18817

 - CMakeParseImplicitIncludeInfo.cmake: new parser that extracts the
   compiler's include path from verbose output.  If the parser cannot
   parse the output, we fall back to the old behavior.  On osx we skip
   over framework directories (handled elsewhere).

 - CMakeDetermineCompilerABI.cmake:
     - use verbose flag in try_compile for ${src}
     - use new cmake_parse_implicit_include_info() to attempt extract
       implicit include directory path and if successful set
        CMAKE_${LANG}_IMPLICIT_INCLUDE_DIRECTORIES

 - CMakeCCompiler.cmake.in and CMakeCXXCompiler.cmake.in - preserve
   CMAKE_${LANG}_IMPLICIT_INCLUDE_DIRECTORIES value between runs in
   the same way CMAKE_${LANG}_IMPLICIT_LINK_DIRECTORIES is preserved

 - Tests/RunCMake/ParseImplicitIncludeInfo: tests for parse
   based on the older Tests/CMakeTests/ImplicitLinkInfoTest.cmake.in.
   The test runs a set of verbose compiler outputs collected from
   various machines through t...

Have CMakeDetermineCompilerABI set the locale to C before calling
try_compile().  This is for the implicit include path parser to
keep all the verbose compiler messages in English so we can parse
it.   See #18784 for discussion.

Default to the same flag that is used for verbose link information, but
provide another internal platform information variable to use a
compilation-specific variant.  Populate it for CUDA where we use a
different compiler for compilation and linking and therefore need
different flags.

Co-Author: Chuck Cranor <chuck@ece.cmu.edu>

When generating the `CMakeLists.txt` file, we pass the values given
to our `COMPILE_DEFINITIONS` option in an `add_definitions` call.
Pass them as bracket arguments to preserve special characters
like `#`.