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* Added FindGTest with patch GMock targets

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bergmann 4 years ago
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# Distributed under the OSI-approved BSD 3-Clause License. See accompanying
# file Copyright.txt or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindGTest
---------

Locate the Google C++ Testing Framework.

Imported targets
^^^^^^^^^^^^^^^^

This module defines the following :prop_tgt:`IMPORTED` targets:

``GTest::GTest``
The Google Test ``gtest`` library, if found; adds Thread::Thread
automatically
``GTest::Main``
The Google Test ``gtest_main`` library, if found


Result variables
^^^^^^^^^^^^^^^^

This module will set the following variables in your project:

``GTEST_FOUND``
Found the Google Testing framework
``GTEST_INCLUDE_DIRS``
the directory containing the Google Test headers

The library variables below are set as normal variables. These
contain debug/optimized keywords when a debugging library is found.

``GTEST_LIBRARIES``
The Google Test ``gtest`` library; note it also requires linking
with an appropriate thread library
``GTEST_MAIN_LIBRARIES``
The Google Test ``gtest_main`` library
``GTEST_BOTH_LIBRARIES``
Both ``gtest`` and ``gtest_main``

Cache variables
^^^^^^^^^^^^^^^

The following cache variables may also be set:

``GTEST_ROOT``
The root directory of the Google Test installation (may also be
set as an environment variable)
``GTEST_MSVC_SEARCH``
If compiling with MSVC, this variable can be set to ``MT`` or
``MD`` (the default) to enable searching a GTest build tree


Example usage
^^^^^^^^^^^^^

::

enable_testing()
find_package(GTest REQUIRED)

add_executable(foo foo.cc)
target_link_libraries(foo GTest::GTest GTest::Main)

add_test(AllTestsInFoo foo)


Deeper integration with CTest
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

See :module:`GoogleTest` for information on the :command:`gtest_add_tests`
and :command:`gtest_discover_tests` commands.
#]=======================================================================]

include(GoogleTest)

function(__gtest_append_debugs _endvar _library)
if(${_library} AND ${_library}_DEBUG)
set(_output optimized ${${_library}} debug ${${_library}_DEBUG})
else()
set(_output ${${_library}})
endif()
set(${_endvar} ${_output} PARENT_SCOPE)
endfunction()

function(__gtest_find_library _name)
find_library(${_name}
NAMES ${ARGN}
HINTS
ENV GTEST_ROOT
${GTEST_ROOT}
PATH_SUFFIXES ${_gtest_libpath_suffixes}
)
mark_as_advanced(${_name})
endfunction()

macro(__gtest_determine_windows_library_type _var)
if(EXISTS "${${_var}}")
file(TO_NATIVE_PATH "${${_var}}" _lib_path)
get_filename_component(_name "${${_var}}" NAME_WE)
file(STRINGS "${${_var}}" _match REGEX "${_name}\\.dll" LIMIT_COUNT 1)
if(NOT _match STREQUAL "")
set(${_var}_TYPE SHARED PARENT_SCOPE)
else()
set(${_var}_TYPE UNKNOWN PARENT_SCOPE)
endif()
return()
endif()
endmacro()

function(__gtest_determine_library_type _var)
if(WIN32)
# For now, at least, only Windows really needs to know the library type
__gtest_determine_windows_library_type(${_var})
__gtest_determine_windows_library_type(${_var}_RELEASE)
__gtest_determine_windows_library_type(${_var}_DEBUG)
endif()
# If we get here, no determination was made from the above checks
set(${_var}_TYPE UNKNOWN PARENT_SCOPE)
endfunction()

function(__gtest_import_library _target _var _config)
if(_config)
set(_config_suffix "_${_config}")
else()
set(_config_suffix "")
endif()

set(_lib "${${_var}${_config_suffix}}")
if(EXISTS "${_lib}")
if(_config)
set_property(TARGET ${_target} APPEND PROPERTY
IMPORTED_CONFIGURATIONS ${_config})
endif()
set_target_properties(${_target} PROPERTIES
IMPORTED_LINK_INTERFACE_LANGUAGES${_config_suffix} "CXX")
if(WIN32 AND ${_var}_TYPE STREQUAL SHARED)
set_target_properties(${_target} PROPERTIES
IMPORTED_IMPLIB${_config_suffix} "${_lib}")
else()
set_target_properties(${_target} PROPERTIES
IMPORTED_LOCATION${_config_suffix} "${_lib}")
endif()
endif()
endfunction()

#

if(NOT DEFINED GTEST_MSVC_SEARCH)
set(GTEST_MSVC_SEARCH MD)
endif()

set(_gtest_libpath_suffixes lib)
if(MSVC)
if(GTEST_MSVC_SEARCH STREQUAL "MD")
list(APPEND _gtest_libpath_suffixes
msvc/gtest-md/Debug
msvc/gtest-md/Release
msvc/x64/Debug
msvc/x64/Release
)
elseif(GTEST_MSVC_SEARCH STREQUAL "MT")
list(APPEND _gtest_libpath_suffixes
msvc/gtest/Debug
msvc/gtest/Release
msvc/x64/Debug
msvc/x64/Release
)
endif()
endif()


find_path(GTEST_INCLUDE_DIR gtest/gtest.h
HINTS
$ENV{GTEST_ROOT}/include
${GTEST_ROOT}/include
)
mark_as_advanced(GTEST_INCLUDE_DIR)

find_path(GMOCK_INCLUDE_DIR gmock/gmock.h
HINTS
$ENV{GTEST_ROOT}/include
${GTEST_ROOT}/include
)
mark_as_advanced(GMOCK_INCLUDE_DIR)

if(MSVC AND GTEST_MSVC_SEARCH STREQUAL "MD")
# The provided /MD project files for Google Test add -md suffixes to the
# library names.
__gtest_find_library(GTEST_LIBRARY gtest-md gtest)
__gtest_find_library(GTEST_LIBRARY_DEBUG gtest-mdd gtestd)
__gtest_find_library(GTEST_MAIN_LIBRARY gtest_main-md gtest_main)
__gtest_find_library(GTEST_MAIN_LIBRARY_DEBUG gtest_main-mdd gtest_maind)
else()
__gtest_find_library(GTEST_LIBRARY gtest)
__gtest_find_library(GTEST_LIBRARY_DEBUG gtestd)
__gtest_find_library(GTEST_MAIN_LIBRARY gtest_main)
__gtest_find_library(GTEST_MAIN_LIBRARY_DEBUG gtest_maind)

__gtest_find_library(GMOCK_LIBRARY gmock)
__gtest_find_library(GMOCK_LIBRARY_DEBUG gmockd)
__gtest_find_library(GMOCK_MAIN_LIBRARY gmock_main)
__gtest_find_library(GMOCK_MAIN_LIBRARY_DEBUG gmock_maind)
endif()

include(FindPackageHandleStandardArgs)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GTest DEFAULT_MSG
GTEST_LIBRARY
GTEST_INCLUDE_DIR
GTEST_MAIN_LIBRARY
GMOCK_LIBRARY
GMOCK_INCLUDE_DIR
GMOCK_MAIN_LIBRARY)

if(GTEST_FOUND)
set(GTEST_INCLUDE_DIRS ${GTEST_INCLUDE_DIR})
__gtest_append_debugs(GTEST_LIBRARIES GTEST_LIBRARY)
__gtest_append_debugs(GTEST_MAIN_LIBRARIES GTEST_MAIN_LIBRARY)
set(GTEST_BOTH_LIBRARIES ${GTEST_LIBRARIES} ${GTEST_MAIN_LIBRARIES})

find_package(Threads QUIET)

if(NOT TARGET GTest::GTest)
__gtest_determine_library_type(GTEST_LIBRARY)
add_library(GTest::GTest ${GTEST_LIBRARY_TYPE} IMPORTED)
if(TARGET Threads::Threads)
set_target_properties(GTest::GTest PROPERTIES
INTERFACE_LINK_LIBRARIES Threads::Threads)
endif()
if(GTEST_LIBRARY_TYPE STREQUAL "SHARED")
set_target_properties(GTest::GTest PROPERTIES
INTERFACE_COMPILE_DEFINITIONS "GTEST_LINKED_AS_SHARED_LIBRARY=1")
endif()
if(GTEST_INCLUDE_DIRS)
set_target_properties(GTest::GTest PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${GTEST_INCLUDE_DIRS}")
endif()
__gtest_import_library(GTest::GTest GTEST_LIBRARY "")
__gtest_import_library(GTest::GTest GTEST_LIBRARY "RELEASE")
__gtest_import_library(GTest::GTest GTEST_LIBRARY "DEBUG")
endif()
if(NOT TARGET GTest::Main)
__gtest_determine_library_type(GTEST_MAIN_LIBRARY)
add_library(GTest::Main ${GTEST_MAIN_LIBRARY_TYPE} IMPORTED)
set_target_properties(GTest::Main PROPERTIES
INTERFACE_LINK_LIBRARIES "GTest::GTest")
__gtest_import_library(GTest::Main GTEST_MAIN_LIBRARY "")
__gtest_import_library(GTest::Main GTEST_MAIN_LIBRARY "RELEASE")
__gtest_import_library(GTest::Main GTEST_MAIN_LIBRARY "DEBUG")
endif()

if(NOT TARGET GMock::GMock)
__gtest_determine_library_type(GMOCK_LIBRARY)
add_library(GMock::GMock ${GMOCK_LIBRARY_TYPE} IMPORTED)
if(TARGET Threads::Threads)
set_target_properties(GMock::GMock PROPERTIES
INTERFACE_LINK_LIBRARIES GTest::GTest)
endif()
if(GTEST_LIBRARY_TYPE STREQUAL "SHARED")
set_target_properties(GMock::GMock PROPERTIES
INTERFACE_COMPILE_DEFINITIONS "GMOCK_LINKED_AS_SHARED_LIBRARY=1")
endif()
if(GMOCK_INCLUDE_DIRS)
set_target_properties(GMock::GMock PROPERTIES
INTERFACE_INCLUDE_DIRECTORIES "${GMOCK_INCLUDE_DIRS}")
endif()
__gtest_import_library(GMock::GMock GMOCK_LIBRARY "")
__gtest_import_library(GMock::GMock GMOCK_LIBRARY "RELEASE")
__gtest_import_library(GMock::GMock GMOCK_LIBRARY "DEBUG")
endif()
if(NOT TARGET GMock::Main)
__gtest_determine_library_type(GMOCK_MAIN_LIBRARY)
add_library(GMock::Main ${GTEST_MAIN_LIBRARY_TYPE} IMPORTED)
set_target_properties(GMock::Main PROPERTIES
INTERFACE_LINK_LIBRARIES GMock::GMock)
__gtest_import_library(GMock::Main GMOCK_MAIN_LIBRARY "")
__gtest_import_library(GMock::Main GMOCK_MAIN_LIBRARY "RELEASE")
__gtest_import_library(GMock::Main GMOCK_MAIN_LIBRARY "DEBUG")
endif()
endif()

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