diff options
Diffstat (limited to 'third_party/abseil-cpp/CMake/AbseilHelpers.cmake')
| -rw-r--r-- | third_party/abseil-cpp/CMake/AbseilHelpers.cmake | 353 |
1 files changed, 353 insertions, 0 deletions
diff --git a/third_party/abseil-cpp/CMake/AbseilHelpers.cmake b/third_party/abseil-cpp/CMake/AbseilHelpers.cmake new file mode 100644 index 0000000000..86ff9eba2a --- /dev/null +++ b/third_party/abseil-cpp/CMake/AbseilHelpers.cmake @@ -0,0 +1,353 @@ +# +# Copyright 2017 The Abseil Authors. +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# https://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. +# + +include(CMakeParseArguments) +include(AbseilConfigureCopts) +include(AbseilDll) +include(AbseilInstallDirs) + +# The IDE folder for Abseil that will be used if Abseil is included in a CMake +# project that sets +# set_property(GLOBAL PROPERTY USE_FOLDERS ON) +# For example, Visual Studio supports folders. +set(ABSL_IDE_FOLDER Abseil) + +# absl_cc_library() +# +# CMake function to imitate Bazel's cc_library rule. +# +# Parameters: +# NAME: name of target (see Note) +# HDRS: List of public header files for the library +# SRCS: List of source files for the library +# DEPS: List of other libraries to be linked in to the binary targets +# COPTS: List of private compile options +# DEFINES: List of public defines +# LINKOPTS: List of link options +# PUBLIC: Add this so that this library will be exported under absl:: +# Also in IDE, target will appear in Abseil folder while non PUBLIC will be in Abseil/internal. +# TESTONLY: When added, this target will only be built if user passes -DABSL_RUN_TESTS=ON to CMake. +# +# Note: +# By default, absl_cc_library will always create a library named absl_${NAME}, +# and alias target absl::${NAME}. The absl:: form should always be used. +# This is to reduce namespace pollution. +# +# absl_cc_library( +# NAME +# awesome +# HDRS +# "a.h" +# SRCS +# "a.cc" +# ) +# absl_cc_library( +# NAME +# fantastic_lib +# SRCS +# "b.cc" +# DEPS +# absl::awesome # not "awesome" ! +# PUBLIC +# ) +# +# absl_cc_library( +# NAME +# main_lib +# ... +# DEPS +# absl::fantastic_lib +# ) +# +# TODO: Implement "ALWAYSLINK" +function(absl_cc_library) + cmake_parse_arguments(ABSL_CC_LIB + "DISABLE_INSTALL;PUBLIC;TESTONLY" + "NAME" + "HDRS;SRCS;COPTS;DEFINES;LINKOPTS;DEPS" + ${ARGN} + ) + + if(ABSL_CC_LIB_TESTONLY AND NOT ABSL_RUN_TESTS) + return() + endif() + + if(ABSL_ENABLE_INSTALL) + set(_NAME "${ABSL_CC_LIB_NAME}") + else() + set(_NAME "absl_${ABSL_CC_LIB_NAME}") + endif() + + # Check if this is a header-only library + # Note that as of February 2019, many popular OS's (for example, Ubuntu + # 16.04 LTS) only come with cmake 3.5 by default. For this reason, we can't + # use list(FILTER...) + set(ABSL_CC_SRCS "${ABSL_CC_LIB_SRCS}") + foreach(src_file IN LISTS ABSL_CC_SRCS) + if(${src_file} MATCHES ".*\\.(h|inc)") + list(REMOVE_ITEM ABSL_CC_SRCS "${src_file}") + endif() + endforeach() + + if("${ABSL_CC_SRCS}" STREQUAL "") + set(ABSL_CC_LIB_IS_INTERFACE 1) + else() + set(ABSL_CC_LIB_IS_INTERFACE 0) + endif() + + # Determine this build target's relationship to the DLL. It's one of four things: + # 1. "dll" -- This target is part of the DLL + # 2. "dll_dep" -- This target is not part of the DLL, but depends on the DLL. + # Note that we assume any target not in the DLL depends on the + # DLL. This is not a technical necessity but a convenience + # which happens to be true, because nearly every target is + # part of the DLL. + # 3. "shared" -- This is a shared library, perhaps on a non-windows platform + # where DLL doesn't make sense. + # 4. "static" -- This target does not depend on the DLL and should be built + # statically. + if (${ABSL_BUILD_DLL}) + absl_internal_dll_contains(TARGET ${_NAME} OUTPUT _in_dll) + if (${_in_dll}) + # This target should be replaced by the DLL + set(_build_type "dll") + set(ABSL_CC_LIB_IS_INTERFACE 1) + else() + # Building a DLL, but this target is not part of the DLL + set(_build_type "dll_dep") + endif() + elseif(BUILD_SHARED_LIBS) + set(_build_type "shared") + else() + set(_build_type "static") + endif() + + if(NOT ABSL_CC_LIB_IS_INTERFACE) + if(${_build_type} STREQUAL "dll_dep") + # This target depends on the DLL. When adding dependencies to this target, + # any depended-on-target which is contained inside the DLL is replaced + # with a dependency on the DLL. + add_library(${_NAME} STATIC "") + target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS}) + absl_internal_dll_targets( + DEPS ${ABSL_CC_LIB_DEPS} + OUTPUT _dll_deps + ) + target_link_libraries(${_NAME} + PUBLIC ${_dll_deps} + PRIVATE + ${ABSL_CC_LIB_LINKOPTS} + ${ABSL_DEFAULT_LINKOPTS} + ) + + if (ABSL_CC_LIB_TESTONLY) + set(_gtest_link_define "GTEST_LINKED_AS_SHARED_LIBRARY=1") + else() + set(_gtest_link_define) + endif() + + target_compile_definitions(${_NAME} + PUBLIC + ABSL_CONSUME_DLL + "${_gtest_link_define}" + ) + + elseif(${_build_type} STREQUAL "static" OR ${_build_type} STREQUAL "shared") + add_library(${_NAME} "") + target_sources(${_NAME} PRIVATE ${ABSL_CC_LIB_SRCS} ${ABSL_CC_LIB_HDRS}) + target_link_libraries(${_NAME} + PUBLIC ${ABSL_CC_LIB_DEPS} + PRIVATE + ${ABSL_CC_LIB_LINKOPTS} + ${ABSL_DEFAULT_LINKOPTS} + ) + else() + message(FATAL_ERROR "Invalid build type: ${_build_type}") + endif() + + # Linker language can be inferred from sources, but in the case of DLLs we + # don't have any .cc files so it would be ambiguous. We could set it + # explicitly only in the case of DLLs but, because "CXX" is always the + # correct linker language for static or for shared libraries, we set it + # unconditionally. + set_property(TARGET ${_NAME} PROPERTY LINKER_LANGUAGE "CXX") + + target_include_directories(${_NAME} + PUBLIC + "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>" + $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}> + ) + target_compile_options(${_NAME} + PRIVATE ${ABSL_CC_LIB_COPTS}) + target_compile_definitions(${_NAME} PUBLIC ${ABSL_CC_LIB_DEFINES}) + + # Add all Abseil targets to a a folder in the IDE for organization. + if(ABSL_CC_LIB_PUBLIC) + set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}) + elseif(ABSL_CC_LIB_TESTONLY) + set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test) + else() + set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/internal) + endif() + + # INTERFACE libraries can't have the CXX_STANDARD property set + set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD}) + set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON) + + # When being installed, we lose the absl_ prefix. We want to put it back + # to have properly named lib files. This is a no-op when we are not being + # installed. + if(ABSL_ENABLE_INSTALL) + set_target_properties(${_NAME} PROPERTIES + OUTPUT_NAME "absl_${_NAME}" + ) + endif() + else() + # Generating header-only library + add_library(${_NAME} INTERFACE) + target_include_directories(${_NAME} + INTERFACE + "$<BUILD_INTERFACE:${ABSL_COMMON_INCLUDE_DIRS}>" + $<INSTALL_INTERFACE:${ABSL_INSTALL_INCLUDEDIR}> + ) + + if (${_build_type} STREQUAL "dll") + set(ABSL_CC_LIB_DEPS abseil_dll) + endif() + + target_link_libraries(${_NAME} + INTERFACE + ${ABSL_CC_LIB_DEPS} + ${ABSL_CC_LIB_LINKOPTS} + ${ABSL_DEFAULT_LINKOPTS} + ) + target_compile_definitions(${_NAME} INTERFACE ${ABSL_CC_LIB_DEFINES}) + endif() + + # TODO currently we don't install googletest alongside abseil sources, so + # installed abseil can't be tested. + if(NOT ABSL_CC_LIB_TESTONLY AND ABSL_ENABLE_INSTALL) + install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets + RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR} + LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR} + ARCHIVE DESTINATION ${ABSL_INSTALL_LIBDIR} + ) + endif() + + add_library(absl::${ABSL_CC_LIB_NAME} ALIAS ${_NAME}) +endfunction() + +# absl_cc_test() +# +# CMake function to imitate Bazel's cc_test rule. +# +# Parameters: +# NAME: name of target (see Usage below) +# SRCS: List of source files for the binary +# DEPS: List of other libraries to be linked in to the binary targets +# COPTS: List of private compile options +# DEFINES: List of public defines +# LINKOPTS: List of link options +# +# Note: +# By default, absl_cc_test will always create a binary named absl_${NAME}. +# This will also add it to ctest list as absl_${NAME}. +# +# Usage: +# absl_cc_library( +# NAME +# awesome +# HDRS +# "a.h" +# SRCS +# "a.cc" +# PUBLIC +# ) +# +# absl_cc_test( +# NAME +# awesome_test +# SRCS +# "awesome_test.cc" +# DEPS +# absl::awesome +# gmock +# gtest_main +# ) +function(absl_cc_test) + if(NOT ABSL_RUN_TESTS) + return() + endif() + + cmake_parse_arguments(ABSL_CC_TEST + "" + "NAME" + "SRCS;COPTS;DEFINES;LINKOPTS;DEPS" + ${ARGN} + ) + + set(_NAME "absl_${ABSL_CC_TEST_NAME}") + + add_executable(${_NAME} "") + target_sources(${_NAME} PRIVATE ${ABSL_CC_TEST_SRCS}) + target_include_directories(${_NAME} + PUBLIC ${ABSL_COMMON_INCLUDE_DIRS} + PRIVATE ${GMOCK_INCLUDE_DIRS} ${GTEST_INCLUDE_DIRS} + ) + + if (${ABSL_BUILD_DLL}) + target_compile_definitions(${_NAME} + PUBLIC + ${ABSL_CC_TEST_DEFINES} + ABSL_CONSUME_DLL + GTEST_LINKED_AS_SHARED_LIBRARY=1 + ) + + # Replace dependencies on targets inside the DLL with abseil_dll itself. + absl_internal_dll_targets( + DEPS ${ABSL_CC_TEST_DEPS} + OUTPUT ABSL_CC_TEST_DEPS + ) + else() + target_compile_definitions(${_NAME} + PUBLIC + ${ABSL_CC_TEST_DEFINES} + ) + endif() + target_compile_options(${_NAME} + PRIVATE ${ABSL_CC_TEST_COPTS} + ) + + target_link_libraries(${_NAME} + PUBLIC ${ABSL_CC_TEST_DEPS} + PRIVATE ${ABSL_CC_TEST_LINKOPTS} + ) + # Add all Abseil targets to a folder in the IDE for organization. + set_property(TARGET ${_NAME} PROPERTY FOLDER ${ABSL_IDE_FOLDER}/test) + + set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD ${ABSL_CXX_STANDARD}) + set_property(TARGET ${_NAME} PROPERTY CXX_STANDARD_REQUIRED ON) + + add_test(NAME ${_NAME} COMMAND ${_NAME}) +endfunction() + + +function(check_target my_target) + if(NOT TARGET ${my_target}) + message(FATAL_ERROR " ABSL: compiling absl requires a ${my_target} CMake target in your project, + see CMake/README.md for more details") + endif(NOT TARGET ${my_target}) +endfunction() |