1# Copyright 2021 Google LLC
2#
3# Licensed under the Apache License, Version 2.0 (the "License");
4# you may not use this file except in compliance with the License.
5# You may obtain a copy of the License at
6#
7#      https://www.apache.org/licenses/LICENSE-2.0
8#
9# Unless required by applicable law or agreed to in writing, software
10# distributed under the License is distributed on an "AS IS" BASIS,
11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12# See the License for the specific language governing permissions and
13# limitations under the License.
14
15cmake_policy(SET CMP0012 NEW)
16cmake_policy(SET CMP0048 NEW)
17project(ruy CXX)
18cmake_minimum_required(VERSION 3.13)  # Copied from IREE
19set(CMAKE_CXX_STANDARD 14)
20
21
22
23if (PROJECT_NAME STREQUAL CMAKE_PROJECT_NAME)
24  set(RUY_IS_TOPLEVEL TRUE)
25  set(RUY_MINIMAL_BUILD_DEFAULT_VALUE OFF)
26else()
27  set(RUY_IS_TOPLEVEL FALSE)
28  set(RUY_MINIMAL_BUILD_DEFAULT_VALUE ON)
29endif()
30
31option(RUY_MINIMAL_BUILD "Disable ruy's tests, examples, etc. Build only ruy public libraries." ${RUY_MINIMAL_BUILD_DEFAULT_VALUE})
32if (NOT RUY_MINIMAL_BUILD)
33  enable_testing()
34endif()
35
36option(RUY_PROFILER "Enable ruy's built-in profiler (harms performance)" OFF)
37
38include(cmake/ruy_add_all_subdirs.cmake)
39include(cmake/ruy_cc_library.cmake)
40include(cmake/ruy_cc_binary.cmake)
41include(cmake/ruy_cc_test.cmake)
42
43# Skip cpuinfo if it was already generated, which can happen when ruy is
44# a subdirectory in a wider project that already uses cpuinfo.
45if (NOT TARGET cpuinfo)
46  # Test if the third_party/cpuinfo submodule was checked out before
47  # adding that subdirectory, so we can do more helpful things below in the
48  # else() block when it's not.
49  set(RUY_CPUINFO_CMAKELISTS_FILE "${CMAKE_CURRENT_SOURCE_DIR}/third_party/cpuinfo/CMakeLists.txt")
50  if (EXISTS "${RUY_CPUINFO_CMAKELISTS_FILE}")
51    # Disabling cpuinfo's tests and benchmarks to prevent a copy of its
52    # googletest dependency getting downloaded into a 'deps' directory in the
53    # source tree!
54    set(CPUINFO_BUILD_BENCHMARKS OFF CACHE BOOL "" FORCE)
55    set(CPUINFO_BUILD_UNIT_TESTS OFF CACHE BOOL "" FORCE)
56    set(CPUINFO_BUILD_MOCK_TESTS OFF CACHE BOOL "" FORCE)
57    add_subdirectory("third_party/cpuinfo" EXCLUDE_FROM_ALL)
58  else()
59    # third_party/cpuinfo is not checked out. That could be intentional when
60    # ruy is a subdirectory in a wider project that is already providing
61    # the cpuinfo target. Maybe that wider project's CMakeLists is ordered
62    # in such a way that cpuinfo gets generated after ruy. In that case,
63    # it's helpful that we continue silently. In the worst case if the cpuinfo
64    # target never gets defined, ruy will fail to compile.
65    # On the other hand, if ruy is the top-level project here (not part of a
66    # wider project) then nothing will define the cpuinfo target for us,
67    # so we will definitely fail to compile, so we may as well fail right here.
68    if (RUY_IS_TOPLEVEL)
69      message(FATAL_ERROR "This file does not exist:\n${RUY_CPUINFO_CMAKELISTS_FILE}\n"
70                    "That typically means that the git submodules of the ruy "
71                    "repository haven't been checked out. Try this in the ruy "
72                    "git directory:\n  git submodule update --init")
73    endif()
74  endif()
75endif()
76
77# googletest is only needed for tests. Projects embedding ruy as a subdirectory
78# and not needing to build ruy tests may proceed without a local checkout of
79# third_party/googletest.
80if (NOT RUY_MINIMAL_BUILD
81    AND NOT TARGET gtest
82    AND EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/third_party/googletest/CMakeLists.txt")
83  add_subdirectory("third_party/googletest" EXCLUDE_FROM_ALL)
84endif()
85
86add_subdirectory("ruy")
87
88if (NOT RUY_MINIMAL_BUILD)
89  add_subdirectory("example")
90endif()
91