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1# Copyright (c) 2015-2016 The Khronos Group Inc.
2#
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#     http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15
16# Utility functions for pushing & popping variables.
17function(push_variable var val)
18    set("${var}_SAVE_STACK" "${${var}}" "${${var}_SAVE_STACK}" PARENT_SCOPE)
19    set(${var} ${val} PARENT_SCOPE)
20endfunction()
21function(pop_variable var)
22    set(save_stack "${${var}_SAVE_STACK}")
23    list(GET save_stack 0 val)
24    list(REMOVE_AT save_stack 0)
25    set("${var}_SAVE_STACK" "${save_stack}" PARENT_SCOPE)
26    set(${var} ${val} PARENT_SCOPE)
27endfunction()
28
29if (DEFINED SPIRV-Headers_SOURCE_DIR)
30  # This allows flexible position of the SPIRV-Headers repo.
31  set(SPIRV_HEADER_DIR ${SPIRV-Headers_SOURCE_DIR})
32else()
33  if (IS_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/SPIRV-Headers)
34    set(SPIRV_HEADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/SPIRV-Headers)
35  else()
36    set(SPIRV_HEADER_DIR ${CMAKE_CURRENT_SOURCE_DIR}/spirv-headers)
37  endif()
38endif()
39
40if (IS_DIRECTORY ${SPIRV_HEADER_DIR})
41  # TODO(dneto): We should not be modifying the parent scope.
42  set(SPIRV_HEADER_INCLUDE_DIR ${SPIRV_HEADER_DIR}/include PARENT_SCOPE)
43
44  # Add SPIRV-Headers as a sub-project if it isn't already defined.
45  # Do this so enclosing projects can use SPIRV-Headers_SOURCE_DIR to find
46  # headers to include.
47  if (NOT DEFINED SPIRV-Headers_SOURCE_DIR)
48    set(SPIRV_HEADERS_SKIP_INSTALL ON)
49    set(SPIRV_HEADERS_SKIP_EXAMPLES ON)
50    add_subdirectory(${SPIRV_HEADER_DIR})
51  endif()
52else()
53  message(FATAL_ERROR
54    "SPIRV-Headers was not found - please checkout a copy under external/.")
55endif()
56
57if (NOT ${SPIRV_SKIP_TESTS})
58  # Find gmock if we can. If it's not already configured, then try finding
59  # it in external/googletest.
60  if (TARGET gmock)
61    message(STATUS "Google Mock already configured")
62  else()
63    set(GMOCK_DIR ${CMAKE_CURRENT_SOURCE_DIR}/googletest)
64    if(EXISTS ${GMOCK_DIR})
65      if(MSVC)
66        # Our tests use ::testing::Combine.  Work around a compiler
67        # detection problem in googletest, where that template is
68        # accidentally disabled for VS 2017.
69        # See https://github.com/google/googletest/issues/1352
70        add_definitions(-DGTEST_HAS_COMBINE=1)
71      endif()
72      if(WIN32)
73        option(gtest_force_shared_crt
74          "Use shared (DLL) run-time lib even when Google Test is built as static lib."
75          ON)
76      endif()
77      # gtest requires special defines for building as a shared
78      # library, simply always build as static.
79      push_variable(BUILD_SHARED_LIBS 0)
80      add_subdirectory(${GMOCK_DIR} EXCLUDE_FROM_ALL)
81      pop_variable(BUILD_SHARED_LIBS)
82    endif()
83  endif()
84  if (TARGET gmock)
85    set(GTEST_TARGETS
86      gtest
87      gtest_main
88      gmock
89      gmock_main
90    )
91    foreach(target ${GTEST_TARGETS})
92      set_property(TARGET ${target} PROPERTY FOLDER GoogleTest)
93    endforeach()
94  endif()
95
96  # Find Effcee and RE2, for testing.
97
98  # First find RE2, since Effcee depends on it.
99  # If already configured, then use that.  Otherwise, prefer to find it under 're2'
100  # in this directory.
101  if (NOT TARGET re2)
102    # If we are configuring RE2, then turn off its testing.  It takes a long time and
103    # does not add much value for us.  If an enclosing project configured RE2, then it
104    # has already chosen whether to enable RE2 testing.
105    set(RE2_BUILD_TESTING OFF CACHE STRING "Run RE2 Tests")
106    if (NOT RE2_SOURCE_DIR)
107      if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/re2)
108        set(RE2_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/re2" CACHE STRING "RE2 source dir" )
109      endif()
110    endif()
111  endif()
112
113  if (NOT TARGET effcee)
114    # Expect to find effcee in this directory.
115    if (EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/effcee)
116      # If we're configuring RE2 (via Effcee), then turn off RE2 testing.
117      if (NOT TARGET re2)
118        set(RE2_BUILD_TESTING OFF)
119      endif()
120      if (MSVC)
121        # SPIRV-Tools uses the shared CRT with MSVC.  Tell Effcee to do the same.
122        set(EFFCEE_ENABLE_SHARED_CRT ON)
123      endif()
124      set(EFFCEE_BUILD_SAMPLES OFF CACHE BOOL "Do not build Effcee examples")
125      if (NOT TARGET effcee)
126        set(EFFCEE_BUILD_TESTING OFF CACHE BOOL "Do not build Effcee test suite")
127      endif()
128      push_variable(BUILD_SHARED_LIBS 0) # effcee does not export any symbols for building as a DLL. Always build as static.
129      add_subdirectory(effcee EXCLUDE_FROM_ALL)
130      pop_variable(BUILD_SHARED_LIBS)
131      set_property(TARGET effcee PROPERTY FOLDER Effcee)
132      # Turn off warnings for effcee and re2
133      set_property(TARGET effcee APPEND PROPERTY COMPILE_OPTIONS -w)
134      set_property(TARGET re2 APPEND PROPERTY COMPILE_OPTIONS -w)
135    endif()
136  endif()
137endif()
138
139if(SPIRV_BUILD_FUZZER)
140
141  function(backup_compile_options)
142    get_property(
143        SPIRV_TOOLS_BACKUP_EXTERNAL_COMPILE_OPTIONS
144        DIRECTORY
145        PROPERTY COMPILE_OPTIONS
146        )
147  endfunction()
148
149  function(restore_compile_options)
150    set_property(
151        DIRECTORY
152        PROPERTY COMPILE_OPTIONS
153        ${SPIRV_TOOLS_BACKUP_EXTERNAL_COMPILE_OPTIONS}
154    )
155  endfunction()
156
157  if(NOT TARGET protobuf::libprotobuf OR NOT TARGET protobuf::protoc)
158
159    set(SPIRV_TOOLS_PROTOBUF_DIR ${CMAKE_CURRENT_SOURCE_DIR}/protobuf/cmake)
160    if (NOT IS_DIRECTORY ${SPIRV_TOOLS_PROTOBUF_DIR})
161      message(
162          FATAL_ERROR
163          "protobuf not found - please checkout a copy under external/.")
164    endif()
165    set(protobuf_BUILD_TESTS OFF CACHE BOOL "Disable protobuf tests")
166    set(protobuf_MSVC_STATIC_RUNTIME OFF CACHE BOOL "Do not build protobuf static runtime")
167
168    backup_compile_options()
169
170    if (${CMAKE_CXX_COMPILER_ID} MATCHES Clang)
171      add_compile_options(-Wno-inconsistent-missing-override)
172    endif()
173
174    add_subdirectory(${SPIRV_TOOLS_PROTOBUF_DIR} EXCLUDE_FROM_ALL)
175
176    restore_compile_options()
177
178  endif()
179endif()
180