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#
# 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.
if (POLICY CMP0025)
cmake_policy(SET CMP0025 NEW)
endif()
project(absl)
list(APPEND CMAKE_MODULE_PATH
${CMAKE_CURRENT_LIST_DIR}/CMake
${CMAKE_CURRENT_LIST_DIR}/absl/copts
)
include(GNUInstallDirs)
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_GOOGLETEST_HEAD
"If ON, abseil will download HEAD from googletest at config time." OFF)
option(ABSL_RUN_TESTS "If ON, Abseil tests will be run." OFF)
if(${ABSL_RUN_TESTS})
# enable CTest. This will set BUILD_TESTING to ON unless otherwise specified
# on the command line
include(CTest)
enable_testing()
endif()
## check targets
if(BUILD_TESTING)
if(${ABSL_USE_GOOGLETEST_HEAD})
include(CMake/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)
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