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Diffstat (limited to 'third_party/abseil_cpp/CMakeLists.txt')
| -rw-r--r-- | third_party/abseil_cpp/CMakeLists.txt | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/third_party/abseil_cpp/CMakeLists.txt b/third_party/abseil_cpp/CMakeLists.txt new file mode 100644 index 000000000000..d6f24a572c86 --- /dev/null +++ b/third_party/abseil_cpp/CMakeLists.txt @@ -0,0 +1,181 @@ +# +# 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. +# + +# Most widely used distributions have cmake 3.5 or greater available as of March +# 2019. A notable exception is RHEL-7 (CentOS7). You can install a current +# version of CMake by first installing Extra Packages for Enterprise Linux +# (https://fedoraproject.org/wiki/EPEL#Extra_Packages_for_Enterprise_Linux_.28EPEL.29) +# and then issuing `yum install cmake3` on the command line. +cmake_minimum_required(VERSION 3.5) + +# Compiler id for Apple Clang is now AppleClang. +cmake_policy(SET CMP0025 NEW) + +# if command can use IN_LIST +cmake_policy(SET CMP0057 NEW) + +# Project version variables are the empty string if version is unspecified +cmake_policy(SET CMP0048 NEW) + +project(absl CXX) + +# Output directory is correct by default for most build setups. However, when +# building Abseil as a DLL, it is important to have the DLL in the same +# directory as the executable using it. Thus, we put all executables in a single +# /bin directory. +set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin) + +# when absl is included as subproject (i.e. using add_subdirectory(abseil-cpp)) +# in the source tree of a project that uses it, install rules are disabled. +if(NOT "^${CMAKE_SOURCE_DIR}$" STREQUAL "^${PROJECT_SOURCE_DIR}$") + set(ABSL_ENABLE_INSTALL FALSE) +else() + set(ABSL_ENABLE_INSTALL TRUE) +endif() + +list(APPEND CMAKE_MODULE_PATH + ${CMAKE_CURRENT_LIST_DIR}/CMake + ${CMAKE_CURRENT_LIST_DIR}/absl/copts +) + +# Linking Abseil to shared libraries (such as Nix) requires PIC. +set(CMAKE_POSITION_INDEPENDENT_CODE TRUE) + +include(AbseilInstallDirs) +include(CMakePackageConfigHelpers) +include(AbseilDll) +include(AbseilHelpers) + + +## +## Using absl targets +## +## all public absl targets are +## exported with the absl:: prefix +## +## e.g absl::base absl::synchronization absl::strings .... +## +## DO NOT rely on the internal targets outside of the prefix + + +# include current path +list(APPEND ABSL_COMMON_INCLUDE_DIRS ${CMAKE_CURRENT_SOURCE_DIR}) + +if("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang") + set(ABSL_USING_CLANG ON) +else() + set(ABSL_USING_CLANG OFF) +endif() + +# find dependencies +## pthread +find_package(Threads REQUIRED) + +option(ABSL_USE_EXTERNAL_GOOGLETEST + "If ON, Abseil will assume that the targets for GoogleTest are already provided by the including project. This makes sense when Abseil is used with add_subproject." OFF) + + +option(ABSL_USE_GOOGLETEST_HEAD + "If ON, abseil will download HEAD from googletest at config time." OFF) + +set(ABSL_LOCAL_GOOGLETEST_DIR "/usr/src/googletest" CACHE PATH + "If ABSL_USE_GOOGLETEST_HEAD is OFF, specifies the directory of a local googletest checkout." + ) + +option(ABSL_RUN_TESTS "If ON, Abseil tests will be run." OFF) + +if(${ABSL_RUN_TESTS}) + # enable CTest. This will set BUILD_TESTING to ON unless otherwise specified + # on the command line + include(CTest) + enable_testing() + + ## check targets + if (NOT ABSL_USE_EXTERNAL_GOOGLETEST) + set(absl_gtest_build_dir ${CMAKE_BINARY_DIR}/googletest-build) + if(${ABSL_USE_GOOGLETEST_HEAD}) + set(absl_gtest_src_dir ${CMAKE_BINARY_DIR}/googletest-src) + else() + set(absl_gtest_src_dir ${ABSL_LOCAL_GOOGLETEST_DIR}) + endif() + include(CMake/Googletest/DownloadGTest.cmake) + endif() + + check_target(gtest) + check_target(gtest_main) + check_target(gmock) + + list(APPEND ABSL_TEST_COMMON_LIBRARIES + gtest_main + gtest + gmock + ${CMAKE_THREAD_LIBS_INIT} + ) +endif() + +add_subdirectory(absl) + +if(ABSL_ENABLE_INSTALL) + # absl:lts-remove-begin(system installation is supported for LTS releases) + # We don't support system-wide installation + list(APPEND SYSTEM_INSTALL_DIRS "/usr/local" "/usr" "/opt/" "/opt/local" "c:/Program Files/${PROJECT_NAME}") + if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX IN_LIST SYSTEM_INSTALL_DIRS) + message(WARNING "\ + The default and system-level install directories are unsupported except in LTS \ + releases of Abseil. Please set CMAKE_INSTALL_PREFIX to install Abseil in your \ + source or build tree directly.\ + ") + endif() + # absl:lts-remove-end + + # install as a subdirectory only + install(EXPORT ${PROJECT_NAME}Targets + NAMESPACE absl:: + DESTINATION "${ABSL_INSTALL_CONFIGDIR}" + ) + + configure_package_config_file( + CMake/abslConfig.cmake.in + "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" + INSTALL_DESTINATION "${ABSL_INSTALL_CONFIGDIR}" + ) + install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}Config.cmake" + DESTINATION "${ABSL_INSTALL_CONFIGDIR}" + ) + + # Abseil only has a version in LTS releases. This mechanism is accomplished + # Abseil's internal Copybara (https://github.com/google/copybara) workflows and + # isn't visible in the CMake buildsystem itself. + if(absl_VERSION) + write_basic_package_version_file( + "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake" + COMPATIBILITY ExactVersion + ) + + install(FILES "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake" + DESTINATION ${ABSL_INSTALL_CONFIGDIR} + ) + endif() # absl_VERSION + + install(DIRECTORY absl + DESTINATION ${ABSL_INSTALL_INCLUDEDIR} + FILES_MATCHING + PATTERN "*.inc" + PATTERN "*.h" + PATTERN "copts" EXCLUDE + PATTERN "testdata" EXCLUDE + ) +endif() # ABSL_ENABLE_INSTALL |