Files
CMake/Modules/FindGTest.cmake
Matthew Woehlke 3506179145 FindGTest: Fix shared linking on Windows
Add logic to FindGTest.cmake to attempt to determine if the libraries
are shared or static. If the libraries are shared, add an interface
compile definition that is needed in some cases for successful linking
on Windows.

See also https://github.com/google/googletest/issues/877.
2017-09-18 10:01:13 -04:00

235 lines
7.4 KiB
CMake

# 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(${CMAKE_CURRENT_LIST_DIR}/GoogleTest.cmake)
function(_gtest_append_debugs _endvar _library)
if(${_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
${GTEST_ROOT}/include
)
mark_as_advanced(GTEST_INCLUDE_DIR)
if(MSVC AND GTEST_MSVC_SEARCH STREQUAL "MD")
# The provided /MD project files for Google Test add -md suffixes to the
# library names.
_gtest_find_library(GTEST_LIBRARY gtest-md gtest)
_gtest_find_library(GTEST_LIBRARY_DEBUG gtest-mdd gtestd)
_gtest_find_library(GTEST_MAIN_LIBRARY gtest_main-md gtest_main)
_gtest_find_library(GTEST_MAIN_LIBRARY_DEBUG gtest_main-mdd gtest_maind)
else()
_gtest_find_library(GTEST_LIBRARY gtest)
_gtest_find_library(GTEST_LIBRARY_DEBUG gtestd)
_gtest_find_library(GTEST_MAIN_LIBRARY gtest_main)
_gtest_find_library(GTEST_MAIN_LIBRARY_DEBUG gtest_maind)
endif()
include(${CMAKE_CURRENT_LIST_DIR}/FindPackageHandleStandardArgs.cmake)
FIND_PACKAGE_HANDLE_STANDARD_ARGS(GTest DEFAULT_MSG GTEST_LIBRARY GTEST_INCLUDE_DIR GTEST_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()
endif()