libvpx: Pull from upstream

source/libvpx/third_party/googletest/src/cmake/internal_utils.cmake

-# Defines functions and macros useful for building Google Test and
-# Google Mock.
-#
-# Note:
-#
-# - This file will be run twice when building Google Mock (once via
-#   Google Test's CMakeLists.txt, and once via Google Mock's).
-#   Therefore it shouldn't have any side effects other than defining
-#   the functions and macros.
-#
-# - The functions/macros defined in this file may depend on Google
-#   Test and Google Mock's option() definitions, and thus must be
-#   called *after* the options have been defined.
-
-# Tweaks CMake's default compiler/linker settings to suit Google Test's needs.
-#
-# This must be a macro(), as inside a function string() can only
-# update variables in the function scope.
-macro(fix_default_compiler_settings_)
-  if (MSVC)
-    # For MSVC, CMake sets certain flags to defaults we want to override.
-    # This replacement code is taken from sample in the CMake Wiki at
-    # http://www.cmake.org/Wiki/CMake_FAQ#Dynamic_Replace.
-    foreach (flag_var
-             CMAKE_CXX_FLAGS CMAKE_CXX_FLAGS_DEBUG CMAKE_CXX_FLAGS_RELEASE
-             CMAKE_CXX_FLAGS_MINSIZEREL CMAKE_CXX_FLAGS_RELWITHDEBINFO)
-      if (NOT BUILD_SHARED_LIBS AND NOT gtest_force_shared_crt)
-        # When Google Test is built as a shared library, it should also use
-        # shared runtime libraries.  Otherwise, it may end up with multiple
-        # copies of runtime library data in different modules, resulting in
-        # hard-to-find crashes. When it is built as a static library, it is
-        # preferable to use CRT as static libraries, as we don't have to rely
-        # on CRT DLLs being available. CMake always defaults to using shared
-        # CRT libraries, so we override that default here.
-        string(REPLACE "/MD" "-MT" ${flag_var} "${${flag_var}}")
-      endif()
-
-      # We prefer more strict warning checking for building Google Test.
-      # Replaces /W3 with /W4 in defaults.
-      string(REPLACE "/W3" "-W4" ${flag_var} "${${flag_var}}")
-    endforeach()
-  endif()
-endmacro()
-
-# Defines the compiler/linker flags used to build Google Test and
-# Google Mock.  You can tweak these definitions to suit your need.  A
-# variable's value is empty before it's explicitly assigned to.
-macro(config_compiler_and_linker)
-  if (NOT gtest_disable_pthreads)
-    # Defines CMAKE_USE_PTHREADS_INIT and CMAKE_THREAD_LIBS_INIT.
-    find_package(Threads)
-  endif()
-
-  fix_default_compiler_settings_()
-  if (MSVC)
-    # Newlines inside flags variables break CMake's NMake generator.
-    # TODO(vladl@google.com): Add -RTCs and -RTCu to debug builds.
-    set(cxx_base_flags "-GS -W4 -WX -wd4127 -wd4251 -wd4275 -nologo -J -Zi")
-    set(cxx_base_flags "${cxx_base_flags} -D_UNICODE -DUNICODE -DWIN32 -D_WIN32")
-    set(cxx_base_flags "${cxx_base_flags} -DSTRICT -DWIN32_LEAN_AND_MEAN")
-    set(cxx_exception_flags "-EHsc -D_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "-D_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-GR-")
-  elseif (CMAKE_COMPILER_IS_GNUCXX)
-    set(cxx_base_flags "-Wall -Wshadow")
-    set(cxx_exception_flags "-fexceptions")
-    set(cxx_no_exception_flags "-fno-exceptions")
-    # Until version 4.3.2, GCC doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-fno-rtti -DGTEST_HAS_RTTI=0")
-    set(cxx_strict_flags "-Wextra")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "SunPro")
-    set(cxx_exception_flags "-features=except")
-    # Sun Pro doesn't provide macros to indicate whether exceptions and
-    # RTTI are enabled, so we define GTEST_HAS_* explicitly.
-    set(cxx_no_exception_flags "-features=no%except -DGTEST_HAS_EXCEPTIONS=0")
-    set(cxx_no_rtti_flags "-features=no%rtti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "VisualAge" OR
-      CMAKE_CXX_COMPILER_ID STREQUAL "XL")
-    # CMake 2.8 changes Visual Age's compiler ID to "XL".
-    set(cxx_exception_flags "-qeh")
-    set(cxx_no_exception_flags "-qnoeh")
-    # Until version 9.0, Visual Age doesn't define a macro to indicate
-    # whether RTTI is enabled.  Therefore we define GTEST_HAS_RTTI
-    # explicitly.
-    set(cxx_no_rtti_flags "-qnortti -DGTEST_HAS_RTTI=0")
-  elseif (CMAKE_CXX_COMPILER_ID STREQUAL "HP")
-    set(cxx_base_flags "-AA -mt")
-    set(cxx_exception_flags "-DGTEST_HAS_EXCEPTIONS=1")
-    set(cxx_no_exception_flags "+noeh -DGTEST_HAS_EXCEPTIONS=0")
-    # RTTI can not be disabled in HP aCC compiler.
-    set(cxx_no_rtti_flags "")
-  endif()
-
-  if (CMAKE_USE_PTHREADS_INIT)  # The pthreads library is available and allowed.
-    set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=1")
-  else()
-    set(cxx_base_flags "${cxx_base_flags} -DGTEST_HAS_PTHREAD=0")
-  endif()
-
-  # For building gtest's own tests and samples.
-  set(cxx_exception "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_exception_flags}")
-  set(cxx_no_exception
-    "${CMAKE_CXX_FLAGS} ${cxx_base_flags} ${cxx_no_exception_flags}")
-  set(cxx_default "${cxx_exception}")
-  set(cxx_no_rtti "${cxx_default} ${cxx_no_rtti_flags}")
-  set(cxx_use_own_tuple "${cxx_default} -DGTEST_USE_OWN_TR1_TUPLE=1")
-
-  # For building the gtest libraries.
-  set(cxx_strict "${cxx_default} ${cxx_strict_flags}")
-endmacro()
-
-# Defines the gtest & gtest_main libraries.  User tests should link
-# with one of them.
-function(cxx_library_with_type name type cxx_flags)
-  # type can be either STATIC or SHARED to denote a static or shared library.
-  # ARGN refers to additional arguments after 'cxx_flags'.
-  add_library(${name} ${type} ${ARGN})
-  set_target_properties(${name}
-    PROPERTIES
-    COMPILE_FLAGS "${cxx_flags}")
-  if (BUILD_SHARED_LIBS OR type STREQUAL "SHARED")
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_CREATE_SHARED_LIBRARY=1")
-  endif()
-  if (CMAKE_USE_PTHREADS_INIT)
-    target_link_libraries(${name} ${CMAKE_THREAD_LIBS_INIT})
-  endif()
-endfunction()
-
-########################################################################
-#
-# Helper functions for creating build targets.
-
-function(cxx_shared_library name cxx_flags)
-  cxx_library_with_type(${name} SHARED "${cxx_flags}" ${ARGN})
-endfunction()
-
-function(cxx_library name cxx_flags)
-  cxx_library_with_type(${name} "" "${cxx_flags}" ${ARGN})
-endfunction()
-
-# cxx_executable_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ executable that depends on the given libraries and
-# is built from the given source files with the given compiler flags.
-function(cxx_executable_with_flags name cxx_flags libs)
-  add_executable(${name} ${ARGN})
-  if (cxx_flags)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_FLAGS "${cxx_flags}")
-  endif()
-  if (BUILD_SHARED_LIBS)
-    set_target_properties(${name}
-      PROPERTIES
-      COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
-  endif()
-  # To support mixing linking in static and dynamic libraries, link each
-  # library in with an extra call to target_link_libraries.
-  foreach (lib "${libs}")
-    target_link_libraries(${name} ${lib})
-  endforeach()
-endfunction()
-
-# cxx_executable(name dir lib srcs...)
-#
-# creates a named target that depends on the given libs and is built
-# from the given source files.  dir/name.cc is implicitly included in
-# the source file list.
-function(cxx_executable name dir libs)
-  cxx_executable_with_flags(
-    ${name} "${cxx_default}" "${libs}" "${dir}/${name}.cc" ${ARGN})
-endfunction()
-
-# Sets PYTHONINTERP_FOUND and PYTHON_EXECUTABLE.
-find_package(PythonInterp)
-
-# cxx_test_with_flags(name cxx_flags libs srcs...)
-#
-# creates a named C++ test that depends on the given libs and is built
-# from the given source files with the given compiler flags.
-function(cxx_test_with_flags name cxx_flags libs)
-  cxx_executable_with_flags(${name} "${cxx_flags}" "${libs}" ${ARGN})
-  add_test(${name} ${name})
-endfunction()
-
-# cxx_test(name libs srcs...)
-#
-# creates a named test target that depends on the given libs and is
-# built from the given source files.  Unlike cxx_test_with_flags,
-# test/name.cc is already implicitly included in the source file list.
-function(cxx_test name libs)
-  cxx_test_with_flags("${name}" "${cxx_default}" "${libs}"
-    "test/${name}.cc" ${ARGN})
-endfunction()
-
-# py_test(name)
-#
-# creates a Python test with the given name whose main module is in
-# test/name.py.  It does nothing if Python is not installed.
-function(py_test name)
-  # We are not supporting Python tests on Linux yet as they consider
-  # all Linux environments to be google3 and try to use google3 features.
-  if (PYTHONINTERP_FOUND)
-    # ${CMAKE_BINARY_DIR} is known at configuration time, so we can
-    # directly bind it from cmake. ${CTEST_CONFIGURATION_TYPE} is known
-    # only at ctest runtime (by calling ctest -c <Configuration>), so
-    # we have to escape $ to delay variable substitution here.
-    add_test(${name}
-      ${PYTHON_EXECUTABLE} ${CMAKE_CURRENT_SOURCE_DIR}/test/${name}.py
-          --build_dir=${CMAKE_CURRENT_BINARY_DIR}/\${CTEST_CONFIGURATION_TYPE})
-  endif()
-endfunction()