Make CMake superbuild behave more similar to FetchContent

- Move CMake superbuild files
- Drop use of `CMakeLists.txt.in` configure files
- Allow overriding dependency directories. For now, this should only be
  used by GitHub workflows. Will be expanded on later, possibly renaming
  the variables.

This change is one in a series to make it easier to consume/customize
Sandboxed API in downstream projects.

Drive-by:
- Update `.gitignore` to ignore clangd's `.cache` directory

Signed-off-by: Christian Blichmann <cblichmann@google.com>

.gitignore

@@ -11,7 +11,8 @@ build/
 *.py[co]
 __py_cache__/
 # IDE files
+.cache/
 .clangd/
+.idea/
 .vscode/
-.idea
 compile_commands.json

CMakeLists.txt

@@ -45,7 +45,8 @@ if(SAPI_HARDENED_SOURCE)
 endif()
 
 # Sapi CMake modules, order matters
-list(APPEND CMAKE_MODULE_PATH "${SAPI_SOURCE_DIR}/cmake")
+list(APPEND CMAKE_MODULE_PATH "${SAPI_SOURCE_DIR}/cmake"
+                              "${SAPI_SOURCE_DIR}/cmake/modules")
 include(SapiOptions)
 include(SapiDeps)
 include(SapiUtil)

cmake/SapiDeps.cmake

@@ -38,56 +38,56 @@ endif()
 
 if(SAPI_ENABLE_TESTS)
   if(SAPI_DOWNLOAD_GOOGLETEST)
-    include(cmake/googletest/Download.cmake)
+    include(cmake/googletest.cmake)
   endif()
   check_target(gtest)
   check_target(gtest_main)
   check_target(gmock)
 
   if(SAPI_DOWNLOAD_BENCHMARK)
-    include(cmake/benchmark/Download.cmake)
+    include(cmake/benchmark.cmake)
   endif()
   check_target(benchmark)
 endif()
 
 if(SAPI_DOWNLOAD_ABSL)
-  include(cmake/abseil/Download.cmake)
+  include(cmake/abseil-cpp.cmake)
 endif()
 check_target(absl::core_headers)
 
 if(SAPI_DOWNLOAD_LIBCAP)
-  include(cmake/libcap/Download.cmake)
+  include(cmake/libcap.cmake)
   check_target(libcap::libcap)
 else()
   find_package(Libcap REQUIRED)
 endif()
 
 if(SAPI_DOWNLOAD_LIBFFI)
-  include(cmake/libffi/Download.cmake)
+  include(cmake/libffi.cmake)
   check_target(libffi::libffi)
 else()
   find_package(Libffi REQUIRED)
 endif()
 
 if(SAPI_DOWNLOAD_LIBUNWIND)
-  include(cmake/libunwind/Download.cmake)
+  include(cmake/libunwind.cmake)
 endif()
 check_target(unwind_ptrace_wrapped)
 
 if(SAPI_DOWNLOAD_GFLAGS)
-  include(cmake/gflags/Download.cmake)
+  include(cmake/gflags.cmake)
 endif()
 check_target(gflags)
 
 if(SAPI_DOWNLOAD_GLOG)
-  include(cmake/glog/Download.cmake)
+  include(cmake/glog.cmake)
 endif()
 check_target(glog::glog)
 
 add_dependencies(glog gflags::gflags)
 
 if(SAPI_DOWNLOAD_PROTOBUF)
-  include(cmake/protobuf/Download.cmake)
+  include(cmake/protobuf.cmake)
   check_target(protobuf::libprotobuf)
   check_target(protobuf::protoc)
 else()
@@ -96,7 +96,7 @@ endif()
 
 if(SAPI_ENABLE_EXAMPLES)
   if(SAPI_DOWNLOAD_ZLIB)
-    include(cmake/zlib/Download.cmake)
+    include(cmake/zlib.cmake)
     check_target(ZLIB::ZLIB)
   else()
     find_package(ZLIB REQUIRED)

cmake/abseil-cpp.cmake

@@ -12,12 +12,31 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Downloads and unpacks Abseil at configure time
+set(workdir "${CMAKE_BINARY_DIR}/_deps/absl-populate")
 
-set(workdir "${CMAKE_BINARY_DIR}/absl-download")
+set(SAPI_ABSL_GIT_REPOSITORY https://github.com/abseil/abseil-cpp.git
+                             CACHE STRING "")
+set(SAPI_ABSL_GIT_TAG 4fd9a1ec5077daac14eeee05df931d658ec0b7b8
+                      CACHE STRING "") # 2020-11-19
+set(SAPI_ABSL_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/absl-src" CACHE STRING "")
+set(SAPI_ABSL_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/absl-build" CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(absl-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(absl
+  GIT_REPOSITORY    \"${SAPI_ABSL_GIT_REPOSITORY}\"
+  GIT_TAG           \"${SAPI_ABSL_GIT_TAG}\"
+  SOURCE_DIR        \"${SAPI_ABSL_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_ABSL_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
 
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
 execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
                 RESULT_VARIABLE error
                 WORKING_DIRECTORY "${workdir}")
@@ -42,8 +61,8 @@ set(BUILD_TESTING OFF)  # Avoid errors when re-configuring SAPI
 set(ABSL_CXX_STANDARD ${SAPI_CXX_STANDARD} CACHE STRING "" FORCE)
 set(ABSL_ENABLE_INSTALL ON CACHE BOOL "" FORCE)
 
-add_subdirectory("${CMAKE_BINARY_DIR}/absl-src"
+add_subdirectory("${SAPI_ABSL_SOURCE_DIR}"
-                 "${CMAKE_BINARY_DIR}/absl-build" EXCLUDE_FROM_ALL)
+                 "${SAPI_ABSL_BINARY_DIR}" EXCLUDE_FROM_ALL)
 
 if(_sapi_saved_BUILD_TESTING)
   set(BUILD_TESTING "${_sapi_saved_BUILD_TESTING}")

cmake/abseil/CMakeLists.txt.in

@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(absl-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(absl
-  GIT_REPOSITORY    https://github.com/abseil/abseil-cpp
-  GIT_TAG           4fd9a1ec5077daac14eeee05df931d658ec0b7b8 # 2020-11-19
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/absl-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/absl-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/benchmark.cmake

@@ -0,0 +1,61 @@
+# Copyright 2019 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/benchmark-populate")
+
+set(SAPI_BENCHMARK_GIT_REPOSITORY https://github.com/google/benchmark.git
+                                  CACHE STRING "")
+set(SAPI_BENCHMARK_GIT_TAG 56898e9a92fba537671d5462df9c5ef2ea6a823a
+                           CACHE STRING "") # 2020-04-23
+set(SAPI_BENCHMARK_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/benchmark-src"
+                              CACHE STRING "")
+set(SAPI_BENCHMARK_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/benchmark-build"
+                              CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(benchmark-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(benchmark
+  GIT_REPOSITORY    \"${SAPI_BENCHMARK_GIT_REPOSITORY}\"
+  GIT_TAG           \"${SAPI_BENCHMARK_GIT_TAG}\"
+  SOURCE_DIR        \"${SAPI_BENCHMARK_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_BENCHMARK_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+set(BENCHMARK_ENABLE_TESTING OFF)
+set(BENCHMARK_ENABLE_EXCEPTIONS OFF)
+set(BENCHMARK_ENABLE_GTEST_TESTS OFF)
+
+add_subdirectory("${SAPI_BENCHMARK_SOURCE_DIR}"
+                 "${SAPI_BENCHMARK_BINARY_DIR}" EXCLUDE_FROM_ALL)

cmake/benchmark/CMakeLists.txt.in

@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(benchmark-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(benchmark
-  GIT_REPOSITORY    https://github.com/google/benchmark.git
-  GIT_TAG           56898e9a92fba537671d5462df9c5ef2ea6a823a  # 2020-04-23
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/benchmark-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/benchmark-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/benchmark/Download.cmake

@@ -1,40 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks Benchmark at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/benchmark-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(BENCHMARK_ENABLE_TESTING OFF)
-set(BENCHMARK_ENABLE_EXCEPTIONS OFF)
-set(BENCHMARK_ENABLE_GTEST_TESTS OFF)
-
-add_subdirectory("${CMAKE_BINARY_DIR}/benchmark-src"
-                 "${CMAKE_BINARY_DIR}/benchmark-build" EXCLUDE_FROM_ALL)

cmake/gflags.cmake

@@ -12,12 +12,33 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Downloads and unpacks gflags at configure time
+set(workdir "${CMAKE_BINARY_DIR}/_deps/gflags-populate")
 
-set(workdir "${CMAKE_BINARY_DIR}/gflags-download")
+set(SAPI_GFLAGS_GIT_REPOSITORY https://github.com/gflags/gflags.git
+                               CACHE STRING "")
+set(SAPI_GFLAGS_GIT_TAG addd749114fab4f24b7ea1e0f2f837584389e52c
+                        CACHE STRING "") # 2020-03-18
+set(SAPI_GFLAGS_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/gflags-src"
+                            CACHE STRING "")
+set(SAPI_GFLAGS_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/gflags-build"
+                           CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(gflags-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(gflags
+  GIT_REPOSITORY    \"${SAPI_GFLAGS_GIT_REPOSITORY}\"
+  GIT_TAG           \"${SAPI_GFLAGS_GIT_TAG}\"
+  SOURCE_DIR        \"${SAPI_GFLAGS_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_GFLAGS_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
 
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
 execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
                 RESULT_VARIABLE error
                 WORKING_DIRECTORY "${workdir}")
@@ -38,5 +59,5 @@ set(GFLAGS_INSTALL_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
 set(GFLAGS_INSTALL_HEADERS OFF) # TODO: Temporary off
 set(GFLAGS_BUILD_TESTING FALSE)
 
-add_subdirectory("${CMAKE_BINARY_DIR}/gflags-src"
+add_subdirectory("${SAPI_GFLAGS_SOURCE_DIR}"
-                 "${CMAKE_BINARY_DIR}/gflags-build" EXCLUDE_FROM_ALL)
+                 "${SAPI_GFLAGS_BINARY_DIR}" EXCLUDE_FROM_ALL)

cmake/gflags/CMakeLists.txt.in

@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(gflags-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(gflags
-  GIT_REPOSITORY    https://github.com/gflags/gflags.git
-  GIT_TAG           addd749114fab4f24b7ea1e0f2f837584389e52c  # 2020-03-18
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/gflags-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/gflags-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/glog.cmake

@@ -12,17 +12,35 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Downloads and unpacks glog at configure time
-
 # Allows use target_link_libraries() with targets in other directories.
 if(POLICY CMP0079)
   cmake_policy(SET CMP0079 NEW)
 endif()
 
-set(workdir "${CMAKE_BINARY_DIR}/glog-download")
+set(workdir "${CMAKE_BINARY_DIR}/_deps/glog-populate")
+
+set(SAPI_GLOG_GIT_REPOSITORY https://github.com/google/glog.git CACHE STRING "")
+set(SAPI_GLOG_GIT_TAG 3ba8976592274bc1f907c402ce22558011d6fc5e
+                      CACHE STRING "") # 2020-02-16
+set(SAPI_GLOG_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/glog-src" CACHE STRING "")
+set(SAPI_GLOG_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/glog-build" CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(glog-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(glog
+  GIT_REPOSITORY    \"${SAPI_GLOG_GIT_REPOSITORY}\"
+  GIT_TAG           \"${SAPI_GLOG_GIT_TAG}\"
+  SOURCE_DIR        \"${SAPI_GLOG_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_GLOG_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
 
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
 execute_process(COMMAND "${CMAKE_COMMAND}" -G "${CMAKE_GENERATOR}" .
                 RESULT_VARIABLE error
                 WORKING_DIRECTORY "${workdir}")
@@ -37,32 +55,38 @@ if(error)
   message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
 endif()
 
-# Force gflags from subdirectory
+set(_sapi_saved_BUILD_TESTING ${BUILD_TESTING})
-set(WITH_GFLAGS OFF CACHE BOOL "" FORCE)
-set(HAVE_LIB_GFLAGS 1 CACHE STRING "" FORCE)
 
-set(WITH_UNWIND OFF CACHE BOOL "" FORCE)
+# Force gflags from subdirectory
+set(WITH_GFLAGS FALSE CACHE BOOL "" FORCE)
+set(HAVE_LIB_GFLAGS TRUE CACHE STRING "" FORCE)
+
+set(WITH_UNWIND FALSE CACHE BOOL "" FORCE)
 set(UNWIND_LIBRARY FALSE)
 set(HAVE_PWD_H FALSE)
 
-set(WITH_PKGCONFIG ON CACHE BOOL "" FORCE)
+set(WITH_PKGCONFIG TRUE CACHE BOOL "" FORCE)
 
-set(_glog_BUILD_TESTING ${BUILD_TESTING})
 set(BUILD_TESTING FALSE)
 set(BUILD_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
-add_subdirectory("${CMAKE_BINARY_DIR}/glog-src"
+
-                 "${CMAKE_BINARY_DIR}/glog-build" EXCLUDE_FROM_ALL)
+add_subdirectory("${SAPI_GLOG_SOURCE_DIR}"
-set(BUILD_TESTING ${_glog_BUILD_TESTING})
+                 "${SAPI_GLOG_BINARY_DIR}" EXCLUDE_FROM_ALL)
-set(_glog_BUILD_TESTING)
+
 target_include_directories(glog PUBLIC
-  $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/gflags-build/include>
+  $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/_deps/gflags-build/include>
-  $<BUILD_INTERFACE:${CMAKE_BINARY_DIR}/glog-build>
+  $<BUILD_INTERFACE:${SAPI_GLOG_BINARY_DIR}>
 )
 add_library(gflags_nothreads STATIC IMPORTED)
 set_target_properties(gflags_nothreads PROPERTIES
-  IMPORTED_LOCATION "${CMAKE_BINARY_DIR}/gflags-build/libgflags_nothreads.a")
+  IMPORTED_LOCATION
+  "${CMAKE_BINARY_DIR}/_deps/gflags-build/libgflags_nothreads.a")
 target_link_libraries(glog PRIVATE
   -Wl,--whole-archive
   gflags_nothreads
   -Wl,--no-whole-archive
 )
+
+if(_sapi_saved_BUILD_TESTING)
+  set(BUILD_TESTING "${_sapi_saved_BUILD_TESTING}")
+endif()

cmake/glog/CMakeLists.txt.in

@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(glog-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(glog
-  GIT_REPOSITORY    https://github.com/google/glog.git
-  GIT_TAG           3ba8976592274bc1f907c402ce22558011d6fc5e  # 2020-02-16
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/glog-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/glog-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/googletest.cmake

@@ -0,0 +1,59 @@
+# Copyright 2019 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/googletest-populate")
+
+set(SAPI_GOOGLETEST_GIT_REPOSITORY https://github.com/google/googletest.git
+                                   CACHE STRING "")
+set(SAPI_GOOGLETEST_GIT_TAG dcc92d0ab6c4ce022162a23566d44f673251eee4
+                            CACHE STRING "") # 2020-04-16
+set(SAPI_GOOGLETEST_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/googletest-src"
+                               CACHE STRING "")
+set(SAPI_GOOGLETEST_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/googletest-build"
+                               CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(googletest-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(googletest
+  GIT_REPOSITORY    \"${SAPI_GOOGLETEST_GIT_REPOSITORY}\"
+  GIT_TAG           \"${SAPI_GOOGLETEST_GIT_TAG}\"
+  SOURCE_DIR        \"${SAPI_GOOGLETEST_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_GOOGLETEST_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
+
+add_subdirectory("${SAPI_GOOGLETEST_SOURCE_DIR}"
+                 "${SAPI_GOOGLETEST_BINARY_DIR}" EXCLUDE_FROM_ALL)

cmake/googletest/CMakeLists.txt.in

@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(googletest-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(googletest
-  GIT_REPOSITORY    https://github.com/google/googletest.git
-  GIT_TAG           dcc92d0ab6c4ce022162a23566d44f673251eee4  # 2020-04-16
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/googletest-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/googletest-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/googletest/Download.cmake

@@ -1,38 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks Googletest at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/googletest-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(gtest_force_shared_crt ON CACHE BOOL "" FORCE)
-
-add_subdirectory("${CMAKE_BINARY_DIR}/googletest-src"
-                 "${CMAKE_BINARY_DIR}/googletest-build" EXCLUDE_FROM_ALL)

cmake/libcap.cmake

@@ -0,0 +1,128 @@
+# Copyright 2019 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/libcap-populate")
+
+set(SAPI_LIBCAP_URL
+  https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-2.27.tar.gz
+  CACHE STRING "")
+set(SAPI_LIBCAP_URL_HASH
+  SHA256=260b549c154b07c3cdc16b9ccc93c04633c39f4fb6a4a3b8d1fa5b8a9c3f5fe8
+  CACHE STRING "") # 2019-04-16
+set(SAPI_LIBCAP_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/libcap-src"
+                           CACHE STRING "")
+set(SAPI_LIBCAP_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/libcap-build"
+                           CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(libcap-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(libcap
+  URL               \"${SAPI_LIBCAP_URL}\"
+  URL_HASH          \"${SAPI_LIBCAP_URL_HASH}\"
+  SOURCE_DIR        \"${SAPI_LIBCAP_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_LIBCAP_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+set(libcap_INCLUDE_DIR "${SAPI_LIBCAP_SOURCE_DIR}/libcap/include")
+
+add_custom_command(OUTPUT ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.list.h
+  VERBATIM
+  COMMAND # Use the same logic as libcap/Makefile
+  sed -ne [=[/^#define[ \\t]CAP[_A-Z]\+[ \\t]\+[0-9]\+/{s/^#define \([^ \\t]*\)[ \\t]*\([^ \\t]*\)/\{\"\1\",\2\},/p;}]=]
+      ${SAPI_LIBCAP_SOURCE_DIR}/libcap/include/uapi/linux/capability.h |
+  tr [:upper:] [:lower:] > ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.list.h
+)
+
+if (CMAKE_CROSSCOMPILING AND BUILD_C_COMPILER)
+  add_custom_command(OUTPUT ${SAPI_LIBCAP_SOURCE_DIR}/libcap/libcap_makenames
+    VERBATIM
+    # Use the same logic as libcap/Makefile
+    COMMAND ${BUILD_C_COMPILER} ${BUILD_C_FLAGS}
+                ${SAPI_LIBCAP_SOURCE_DIR}/libcap/_makenames.c
+                -o ${SAPI_LIBCAP_SOURCE_DIR}/libcap/libcap_makenames
+    DEPENDS ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.list.h
+            ${SAPI_LIBCAP_SOURCE_DIR}/libcap/_makenames.c
+  )
+
+  add_custom_command(OUTPUT ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.h
+    COMMAND ${SAPI_LIBCAP_SOURCE_DIR}/libcap/libcap_makenames >
+                ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.h
+    DEPENDS ${SAPI_LIBCAP_SOURCE_DIR}/libcap/libcap_makenames
+  )
+else()
+  add_executable(libcap_makenames
+    ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.list.h
+    ${SAPI_LIBCAP_SOURCE_DIR}/libcap/_makenames.c
+  )
+
+  target_include_directories(libcap_makenames PUBLIC
+    ${SAPI_LIBCAP_SOURCE_DIR}/libcap
+    ${SAPI_LIBCAP_SOURCE_DIR}/libcap/include
+    ${SAPI_LIBCAP_SOURCE_DIR}/libcap/include/uapi
+  )
+
+  add_custom_command(OUTPUT ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.h
+    COMMAND libcap_makenames > ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.h
+  )
+endif()
+
+add_library(cap STATIC
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_alloc.c
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_extint.c
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_file.c
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_flag.c
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_names.h
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_proc.c
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/cap_text.c
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/include/uapi/linux/capability.h
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/libcap.h
+)
+add_library(libcap::libcap ALIAS cap)
+target_include_directories(cap PUBLIC
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/include
+  ${SAPI_LIBCAP_SOURCE_DIR}/libcap/include/uapi
+)
+target_compile_options(cap PRIVATE
+  -Wno-tautological-compare
+  -Wno-unused-result
+)
+target_compile_definitions(cap PRIVATE
+  # Work around sys/xattr.h not declaring this
+  -DXATTR_NAME_CAPS="\"security.capability\""
+)
+target_link_libraries(cap PRIVATE
+  sapi::base
+)

cmake/libcap/CMakeLists.txt.in

@@ -1,27 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(libcap-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(libcap
-  URL https://www.kernel.org/pub/linux/libs/security/linux-privs/libcap2/libcap-2.27.tar.gz
-  URL_HASH SHA256=260b549c154b07c3cdc16b9ccc93c04633c39f4fb6a4a3b8d1fa5b8a9c3f5fe8 # 2019-04-16
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/libcap-src"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/libcap/Download.cmake

@@ -1,103 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks libunwind at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/libcap-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_cap_src "${CMAKE_BINARY_DIR}/libcap-src")
-
-set(libcap_INCLUDE_DIR ${_cap_src}/libcap/include)
-
-add_custom_command(OUTPUT ${_cap_src}/libcap/cap_names.list.h
-  VERBATIM
-  # Use the same logic as libcap/Makefile
-  COMMAND sed -ne [=[/^#define[ \\t]CAP[_A-Z]\+[ \\t]\+[0-9]\+/{s/^#define \([^ \\t]*\)[ \\t]*\([^ \\t]*\)/\{\"\1\",\2\},/p;}]=]
-              ${_cap_src}/libcap/include/uapi/linux/capability.h |
-          tr [:upper:] [:lower:] > ${_cap_src}/libcap/cap_names.list.h
-)
-
-if (CMAKE_CROSSCOMPILING AND BUILD_C_COMPILER)
-  add_custom_command(OUTPUT ${_cap_src}/libcap/libcap_makenames
-    VERBATIM
-    # Use the same logic as libcap/Makefile
-    COMMAND ${BUILD_C_COMPILER} ${BUILD_C_FLAGS} ${_cap_src}/libcap/_makenames.c -o ${_cap_src}/libcap/libcap_makenames
-    DEPENDS ${_cap_src}/libcap/cap_names.list.h ${_cap_src}/libcap/_makenames.c
-  )
-
-  add_custom_command(OUTPUT ${_cap_src}/libcap/cap_names.h
-    COMMAND ${_cap_src}/libcap/libcap_makenames > ${_cap_src}/libcap/cap_names.h
-    DEPENDS ${_cap_src}/libcap/libcap_makenames
-  )
-else()
-  add_executable(libcap_makenames
-    ${_cap_src}/libcap/cap_names.list.h
-    ${_cap_src}/libcap/_makenames.c
-  )
-
-  target_include_directories(libcap_makenames PUBLIC
-    ${_cap_src}/libcap
-    ${_cap_src}/libcap/include
-    ${_cap_src}/libcap/include/uapi
-  )
-
-  add_custom_command(OUTPUT ${_cap_src}/libcap/cap_names.h
-    COMMAND libcap_makenames > ${_cap_src}/libcap/cap_names.h
-  )
-endif()
-
-add_library(cap STATIC
-  ${_cap_src}/libcap/cap_alloc.c
-  ${_cap_src}/libcap/cap_extint.c
-  ${_cap_src}/libcap/cap_file.c
-  ${_cap_src}/libcap/cap_flag.c
-  ${_cap_src}/libcap/cap_names.h
-  ${_cap_src}/libcap/cap_proc.c
-  ${_cap_src}/libcap/cap_text.c
-  ${_cap_src}/libcap/include/uapi/linux/capability.h
-  ${_cap_src}/libcap/libcap.h
-)
-add_library(libcap::libcap ALIAS cap)
-target_include_directories(cap PUBLIC
-  ${_cap_src}/libcap
-  ${_cap_src}/libcap/include
-  ${_cap_src}/libcap/include/uapi
-)
-target_compile_options(cap PRIVATE
-  -Wno-tautological-compare
-  -Wno-unused-result
-)
-target_compile_definitions(cap PRIVATE
-  # Work around sys/xattr.h not declaring this
-  -DXATTR_NAME_CAPS="\"security.capability\""
-)
-target_link_libraries(cap PRIVATE
-  sapi::base
-)

cmake/libffi.cmake

@@ -0,0 +1,121 @@
+# Copyright 2020 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/libffi-populate")
+
+set(SAPI_LIBFFI_URL
+  https://github.com/libffi/libffi/releases/download/v3.3-rc2/libffi-3.3-rc2.tar.gz
+  CACHE STRING "")
+set(SAPI_LIBFFI_URL_HASH
+  SHA256=653ffdfc67fbb865f39c7e5df2a071c0beb17206ebfb0a9ecb18a18f63f6b263
+  CACHE STRING "") # 2019-11-02
+set(SAPI_LIBFFI_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/libffi-src"
+                           CACHE STRING "")
+set(SAPI_LIBFFI_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/libffi-build"
+                           CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(libffi-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(libffi
+  URL               \"${SAPI_LIBFFI_URL}\"
+  URL_HASH          \"${SAPI_LIBFFI_URL_HASH}\"
+  SOURCE_DIR        \"${SAPI_LIBFFI_SOURCE_DIR}\"
+  CONFIGURE_COMMAND ./configure
+                    --disable-dependency-tracking
+                    --disable-builddir
+                    ${SAPI_THIRD_PARTY_CONFIGUREOPTS}
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+  BUILD_IN_SOURCE TRUE
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+set(libffi_INCLUDE_DIR ${SAPI_LIBFFI_SOURCE_DIR}/libffi/include)
+
+if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
+  list(APPEND _ffi_platform_srcs
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/asmnames.h
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/ffi.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/ffi64.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/ffiw64.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/internal.h
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/internal64.h
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/sysv.S
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/unix64.S
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/x86/win64.S
+  )
+elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "ppc64")
+  list(APPEND _ffi_platform_srcs
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/ffi.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/ffi_linux64.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/ffi_sysv.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/linux64.S
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/linux64_closure.S
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/ppc_closure.S
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/sysv.S
+    # Textual headers
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/ffi_powerpc.h
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/powerpc/asm.h
+  )
+elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
+  list(APPEND _ffi_platform_srcs
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/aarch64/ffi.c
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/aarch64/internal.h
+    ${SAPI_LIBFFI_SOURCE_DIR}/src/aarch64/sysv.S
+  )
+endif()
+
+add_library(ffi STATIC
+  ${SAPI_LIBFFI_SOURCE_DIR}/fficonfig.h
+  ${SAPI_LIBFFI_SOURCE_DIR}/include/ffi.h
+  ${SAPI_LIBFFI_SOURCE_DIR}/include/ffi_cfi.h
+  ${SAPI_LIBFFI_SOURCE_DIR}/include/ffi_common.h
+  ${SAPI_LIBFFI_SOURCE_DIR}/include/ffitarget.h
+  ${SAPI_LIBFFI_SOURCE_DIR}/src/closures.c
+  ${SAPI_LIBFFI_SOURCE_DIR}/src/debug.c
+  ${SAPI_LIBFFI_SOURCE_DIR}/src/java_raw_api.c
+  ${SAPI_LIBFFI_SOURCE_DIR}/src/prep_cif.c
+  ${SAPI_LIBFFI_SOURCE_DIR}/src/raw_api.c
+  ${SAPI_LIBFFI_SOURCE_DIR}/src/types.c
+  ${_ffi_platform_srcs}
+)
+add_library(libffi::libffi ALIAS ffi)
+target_include_directories(ffi PUBLIC
+  ${SAPI_LIBFFI_SOURCE_DIR}
+  ${SAPI_LIBFFI_SOURCE_DIR}/include
+)
+target_compile_options(ffi PRIVATE
+  -Wno-vla
+  -Wno-unused-result
+)
+target_link_libraries(ffi PRIVATE
+  sapi::base
+)

cmake/libffi/CMakeLists.txt.in

@@ -1,31 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(libffi-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(libffi
-  URL https://github.com/libffi/libffi/releases/download/v3.3-rc2/libffi-3.3-rc2.tar.gz
-  URL_HASH SHA256=653ffdfc67fbb865f39c7e5df2a071c0beb17206ebfb0a9ecb18a18f63f6b263 # 2019-11-02
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/libffi-src"
-  CONFIGURE_COMMAND ./configure
-                    --disable-dependency-tracking
-                    --disable-builddir
-                    ${SAPI_THIRD_PARTY_CONFIGUREOPTS}
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-  BUILD_IN_SOURCE TRUE
-)

cmake/libffi/Download.cmake

@@ -1,97 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks libunwind at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/libffi-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_ffi_src "${CMAKE_BINARY_DIR}/libffi-src")
-
-set(libffi_INCLUDE_DIR ${_ffi_src}/libffi/include)
-
-if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
-  list(APPEND _ffi_platform_srcs
-    ${_ffi_src}/src/x86/asmnames.h
-    ${_ffi_src}/src/x86/ffi.c
-    ${_ffi_src}/src/x86/ffi64.c
-    ${_ffi_src}/src/x86/ffiw64.c
-    ${_ffi_src}/src/x86/internal.h
-    ${_ffi_src}/src/x86/internal64.h
-    ${_ffi_src}/src/x86/sysv.S
-    ${_ffi_src}/src/x86/unix64.S
-    ${_ffi_src}/src/x86/win64.S
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "ppc64")
-  list(APPEND _ffi_platform_srcs
-    ${_ffi_src}/src/powerpc/ffi.c
-    ${_ffi_src}/src/powerpc/ffi_linux64.c
-    ${_ffi_src}/src/powerpc/ffi_sysv.c
-    ${_ffi_src}/src/powerpc/linux64.S
-    ${_ffi_src}/src/powerpc/linux64_closure.S
-    ${_ffi_src}/src/powerpc/ppc_closure.S
-    ${_ffi_src}/src/powerpc/sysv.S
-    # Textual headers
-    ${_ffi_src}/src/powerpc/ffi_powerpc.h
-    ${_ffi_src}/src/powerpc/asm.h
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
-  list(APPEND _ffi_platform_srcs
-    ${_ffi_src}/src/aarch64/ffi.c
-    ${_ffi_src}/src/aarch64/internal.h
-    ${_ffi_src}/src/aarch64/sysv.S
-  )
-endif()
-
-add_library(ffi STATIC
-  ${_ffi_src}/fficonfig.h
-  ${_ffi_src}/include/ffi.h
-  ${_ffi_src}/include/ffi_cfi.h
-  ${_ffi_src}/include/ffi_common.h
-  ${_ffi_src}/include/ffitarget.h
-  ${_ffi_src}/src/closures.c
-  ${_ffi_src}/src/debug.c
-  ${_ffi_src}/src/java_raw_api.c
-  ${_ffi_src}/src/prep_cif.c
-  ${_ffi_src}/src/raw_api.c
-  ${_ffi_src}/src/types.c
-  ${_ffi_platform_srcs}
-)
-add_library(libffi::libffi ALIAS ffi)
-target_include_directories(ffi PUBLIC
-  ${_ffi_src}
-  ${_ffi_src}/include
-)
-target_compile_options(ffi PRIVATE
-  -Wno-vla
-  -Wno-unused-result
-)
-target_link_libraries(ffi PRIVATE
-  sapi::base
-)

cmake/libunwind.cmake

@@ -0,0 +1,239 @@
+# Copyright 2019 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/libunwind-populate")
+
+set(SAPI_LIBUNWIND_URL
+  https://github.com/libunwind/libunwind/releases/download/v1.2.1/libunwind-1.2.1.tar.gz
+  CACHE STRING "")
+set(SAPI_LIBUNWIND_URL_HASH
+  SHA256=3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb
+  CACHE STRING "")
+set(SAPI_LIBUNWIND_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/libunwind-src"
+                              CACHE STRING "")
+set(SAPI_LIBUNWIND_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/libunwind-build"
+                              CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(libunwind-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(libunwind
+  URL               \"${SAPI_LIBUNWIND_URL}\"
+  URL_HASH          \"${SAPI_LIBUNWIND_URL_HASH}\"
+  SOURCE_DIR        \"${SAPI_LIBUNWIND_SOURCE_DIR}\"
+  CONFIGURE_COMMAND ./configure
+                    --disable-dependency-tracking
+                    --disable-documentation
+                    --disable-minidebuginfo
+                    --disable-shared
+                    --enable-ptrace
+                    ${SAPI_THIRD_PARTY_CONFIGUREOPTS}
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+  BUILD_IN_SOURCE TRUE
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
+  set(_unwind_cpu "x86_64")
+  list(APPEND _unwind_platform_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gcreate_addr_space.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gglobal.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Ginit.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gos-linux.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gregs.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gresume.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gstash_frame.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Gstep.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/is_fpreg.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/setcontext.S
+  )
+  list(APPEND _unwind_ptrace_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/Ginit_remote.c
+  )
+elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "ppc64")
+  set(_unwind_cpu "ppc64")
+  list(APPEND _unwind_platform_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc/Gis_signal_frame.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/Gcreate_addr_space.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/Gglobal.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/Ginit.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/Gregs.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/Gresume.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/Gstep.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/get_func_addr.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc64/is_fpreg.c
+  )
+  list(APPEND _unwind_ptrace_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ppc/Ginit_remote.c
+  )
+elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
+  set(_unwind_cpu "aarch64")
+  list(APPEND _unwind_platform_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gcreate_addr_space.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gglobal.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Ginit.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gis_signal_frame.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gregs.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gresume.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gstash_frame.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Gstep.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/is_fpreg.c
+  )
+  list(APPEND _unwind_ptrace_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/aarch64/Ginit_remote.c
+  )
+elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "arm")
+  set(_unwind_cpu "arm")
+  list(APPEND _unwind_platform_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gcreate_addr_space.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gex_tables.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gglobal.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Ginit.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gis_signal_frame.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gregs.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gresume.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gstash_frame.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Gstep.c
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/is_fpreg.c
+  )
+  list(APPEND _unwind_ptrace_srcs
+    ${SAPI_LIBUNWIND_SOURCE_DIR}/src/arm/Ginit_remote.c
+  )
+endif()
+
+add_library(unwind_ptrace_wrapped STATIC
+  # internal_headers
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/compiler.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/config.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/dwarf.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/dwarf-eh.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/dwarf_i.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind-common.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind-coredump.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind-dynamic.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind-ptrace.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind-x86_64.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind_i.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/mempool.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/remote.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/tdep-x86_64/dwarf-config.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/tdep-x86_64/libunwind_i.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/tdep/dwarf-config.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/tdep/libunwind_i.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/unwind.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/elf32.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/elf64.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/elfxx.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/os-linux.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/init.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/offsets.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/ucontext_i.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/x86_64/unwind_i.h
+  # included_sources
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/elf64.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/elfxx.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/elfxx.c
+  # sources_common
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gexpr.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gfde.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gfind_proc_info-lsb.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gfind_unwind_table.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gparser.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gpe.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/Gstep.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/dwarf/global.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gdestroy_addr_space.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gdyn-extract.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gfind_dynamic_proc_info.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gget_accessors.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gget_proc_name.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gget_reg.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gput_dynamic_unwind_info.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/flush_cache.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/init.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/mempool.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/os-linux.c
+  ${_unwind_platform_srcs}
+  # srcs
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/mi/Gdyn-remote.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_access_fpreg.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_access_mem.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_access_reg.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_accessors.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_create.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_destroy.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_elf.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_find_proc_info.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_get_dyn_info_list_addr.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_get_proc_name.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_internal.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_put_unwind_info.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_reg_offset.c
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src/ptrace/_UPT_resume.c
+  # hdrs
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/config.h
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/libunwind.h
+  # source_ptrace
+  ${_unwind_ptrace_srcs}
+)
+add_library(unwind::unwind_ptrace_wrapped ALIAS unwind_ptrace_wrapped)
+target_include_directories(unwind_ptrace_wrapped PUBLIC
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/tdep
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/include/tdep-${_unwind_cpu}
+  ${SAPI_LIBUNWIND_SOURCE_DIR}/src
+)
+target_compile_options(unwind_ptrace_wrapped PRIVATE
+  -fno-common
+  -Wno-cpp
+)
+target_compile_definitions(unwind_ptrace_wrapped
+  PRIVATE -DHAVE_CONFIG_H
+          -D_GNU_SOURCE
+          -DNO_FRAME_POINTER
+  PUBLIC -D_UPT_accessors=_UPT_accessors_wrapped
+         -D_UPT_create=_UPT_create_wrapped
+         -D_UPT_destroy=_UPT_destroy_wrapped
+
+         -D_U${_unwind_cpu}_create_addr_space=_U${_unwind_cpu}_create_addr_space_wrapped
+         -D_U${_unwind_cpu}_destroy_addr_space=_U${_unwind_cpu}_destroy_addr_space_wrapped
+         -D_U${_unwind_cpu}_get_proc_name=_U${_unwind_cpu}_get_proc_name_wrapped
+         -D_U${_unwind_cpu}_get_reg=_U${_unwind_cpu}_get_reg_wrapped
+         -D_U${_unwind_cpu}_init_remote=_U${_unwind_cpu}_init_remote_wrapped
+         -D_U${_unwind_cpu}_step=_U${_unwind_cpu}_step_wrapped
+
+         -Dptrace=ptrace_wrapped
+)
+target_link_libraries(unwind_ptrace_wrapped PRIVATE
+  sapi::base
+  sandbox2::ptrace_hook
+)

cmake/libunwind/CMakeLists.txt.in

@@ -1,34 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(libunwind-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(libunwind
-  URL https://github.com/libunwind/libunwind/releases/download/v1.2.1/libunwind-1.2.1.tar.gz
-  URL_HASH SHA256=3f3ecb90e28cbe53fba7a4a27ccce7aad188d3210bb1964a923a731a27a75acb
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/libunwind-src"
-  CONFIGURE_COMMAND ./configure
-                    --disable-dependency-tracking
-                    --disable-documentation
-                    --disable-minidebuginfo
-                    --disable-shared
-                    --enable-ptrace
-                    ${SAPI_THIRD_PARTY_CONFIGUREOPTS}
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-  BUILD_IN_SOURCE TRUE
-)

cmake/libunwind/Download.cmake

@@ -1,212 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks libunwind at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/libunwind-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_unwind_src "${CMAKE_BINARY_DIR}/libunwind-src")
-
-if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
-  set(_unwind_cpu "x86_64")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/x86_64/Gcreate_addr_space.c
-    ${_unwind_src}/src/x86_64/Gglobal.c
-    ${_unwind_src}/src/x86_64/Ginit.c
-    ${_unwind_src}/src/x86_64/Gos-linux.c
-    ${_unwind_src}/src/x86_64/Gregs.c
-    ${_unwind_src}/src/x86_64/Gresume.c
-    ${_unwind_src}/src/x86_64/Gstash_frame.c
-    ${_unwind_src}/src/x86_64/Gstep.c
-    ${_unwind_src}/src/x86_64/is_fpreg.c
-    ${_unwind_src}/src/x86_64/setcontext.S
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/x86_64/Ginit_remote.c
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "ppc64")
-  set(_unwind_cpu "ppc64")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/ppc/Gis_signal_frame.c
-    ${_unwind_src}/src/ppc64/Gcreate_addr_space.c
-    ${_unwind_src}/src/ppc64/Gglobal.c
-    ${_unwind_src}/src/ppc64/Ginit.c
-    ${_unwind_src}/src/ppc64/Gregs.c
-    ${_unwind_src}/src/ppc64/Gresume.c
-    ${_unwind_src}/src/ppc64/Gstep.c
-    ${_unwind_src}/src/ppc64/get_func_addr.c
-    ${_unwind_src}/src/ppc64/is_fpreg.c
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/ppc/Ginit_remote.c
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "aarch64")
-  set(_unwind_cpu "aarch64")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/aarch64/Gcreate_addr_space.c
-    ${_unwind_src}/src/aarch64/Gglobal.c
-    ${_unwind_src}/src/aarch64/Ginit.c
-    ${_unwind_src}/src/aarch64/Gis_signal_frame.c
-    ${_unwind_src}/src/aarch64/Gregs.c
-    ${_unwind_src}/src/aarch64/Gresume.c
-    ${_unwind_src}/src/aarch64/Gstash_frame.c
-    ${_unwind_src}/src/aarch64/Gstep.c
-    ${_unwind_src}/src/aarch64/is_fpreg.c
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/aarch64/Ginit_remote.c
-  )
-elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "arm")
-  set(_unwind_cpu "arm")
-  list(APPEND _unwind_platform_srcs
-    ${_unwind_src}/src/arm/Gcreate_addr_space.c
-    ${_unwind_src}/src/arm/Gex_tables.c
-    ${_unwind_src}/src/arm/Gglobal.c
-    ${_unwind_src}/src/arm/Ginit.c
-    ${_unwind_src}/src/arm/Gis_signal_frame.c
-    ${_unwind_src}/src/arm/Gregs.c
-    ${_unwind_src}/src/arm/Gresume.c
-    ${_unwind_src}/src/arm/Gstash_frame.c
-    ${_unwind_src}/src/arm/Gstep.c
-    ${_unwind_src}/src/arm/is_fpreg.c
-  )
-  list(APPEND _unwind_ptrace_srcs
-    ${_unwind_src}/src/arm/Ginit_remote.c
-  )
-endif()
-
-add_library(unwind_ptrace_wrapped STATIC
-  # internal_headers
-  ${_unwind_src}/include/compiler.h
-  ${_unwind_src}/include/config.h
-  ${_unwind_src}/include/dwarf.h
-  ${_unwind_src}/include/dwarf-eh.h
-  ${_unwind_src}/include/dwarf_i.h
-  ${_unwind_src}/include/libunwind.h
-  ${_unwind_src}/include/libunwind-common.h
-  ${_unwind_src}/include/libunwind-coredump.h
-  ${_unwind_src}/include/libunwind-dynamic.h
-  ${_unwind_src}/include/libunwind-ptrace.h
-  ${_unwind_src}/include/libunwind-x86_64.h
-  ${_unwind_src}/include/libunwind_i.h
-  ${_unwind_src}/include/mempool.h
-  ${_unwind_src}/include/remote.h
-  ${_unwind_src}/include/tdep-x86_64/dwarf-config.h
-  ${_unwind_src}/include/tdep-x86_64/libunwind_i.h
-  ${_unwind_src}/include/tdep/dwarf-config.h
-  ${_unwind_src}/include/tdep/libunwind_i.h
-  ${_unwind_src}/include/unwind.h
-  ${_unwind_src}/src/elf32.h
-  ${_unwind_src}/src/elf64.h
-  ${_unwind_src}/src/elfxx.h
-  ${_unwind_src}/src/os-linux.h
-  ${_unwind_src}/src/x86_64/init.h
-  ${_unwind_src}/src/x86_64/offsets.h
-  ${_unwind_src}/src/x86_64/ucontext_i.h
-  ${_unwind_src}/src/x86_64/unwind_i.h
-  # included_sources
-  ${_unwind_src}/src/elf64.h
-  ${_unwind_src}/src/elfxx.h
-  ${_unwind_src}/src/elfxx.c
-  # sources_common
-  ${_unwind_src}/src/dwarf/Gexpr.c
-  ${_unwind_src}/src/dwarf/Gfde.c
-  ${_unwind_src}/src/dwarf/Gfind_proc_info-lsb.c
-  ${_unwind_src}/src/dwarf/Gfind_unwind_table.c
-  ${_unwind_src}/src/dwarf/Gparser.c
-  ${_unwind_src}/src/dwarf/Gpe.c
-  ${_unwind_src}/src/dwarf/Gstep.c
-  ${_unwind_src}/src/dwarf/global.c
-  ${_unwind_src}/src/mi/Gdestroy_addr_space.c
-  ${_unwind_src}/src/mi/Gdyn-extract.c
-  ${_unwind_src}/src/mi/Gfind_dynamic_proc_info.c
-  ${_unwind_src}/src/mi/Gget_accessors.c
-  ${_unwind_src}/src/mi/Gget_proc_name.c
-  ${_unwind_src}/src/mi/Gget_reg.c
-  ${_unwind_src}/src/mi/Gput_dynamic_unwind_info.c
-  ${_unwind_src}/src/mi/flush_cache.c
-  ${_unwind_src}/src/mi/init.c
-  ${_unwind_src}/src/mi/mempool.c
-  ${_unwind_src}/src/os-linux.c
-  ${_unwind_platform_srcs}
-  # srcs
-  ${_unwind_src}/src/mi/Gdyn-remote.c
-  ${_unwind_src}/src/ptrace/_UPT_access_fpreg.c
-  ${_unwind_src}/src/ptrace/_UPT_access_mem.c
-  ${_unwind_src}/src/ptrace/_UPT_access_reg.c
-  ${_unwind_src}/src/ptrace/_UPT_accessors.c
-  ${_unwind_src}/src/ptrace/_UPT_create.c
-  ${_unwind_src}/src/ptrace/_UPT_destroy.c
-  ${_unwind_src}/src/ptrace/_UPT_elf.c
-  ${_unwind_src}/src/ptrace/_UPT_find_proc_info.c
-  ${_unwind_src}/src/ptrace/_UPT_get_dyn_info_list_addr.c
-  ${_unwind_src}/src/ptrace/_UPT_get_proc_name.c
-  ${_unwind_src}/src/ptrace/_UPT_internal.h
-  ${_unwind_src}/src/ptrace/_UPT_put_unwind_info.c
-  ${_unwind_src}/src/ptrace/_UPT_reg_offset.c
-  ${_unwind_src}/src/ptrace/_UPT_resume.c
-  # hdrs
-  ${_unwind_src}/include/config.h
-  ${_unwind_src}/include/libunwind.h
-  # source_ptrace
-  ${_unwind_ptrace_srcs}
-)
-add_library(unwind::unwind_ptrace_wrapped ALIAS unwind_ptrace_wrapped)
-target_include_directories(unwind_ptrace_wrapped PUBLIC
-  ${_unwind_src}/include
-  ${_unwind_src}/include/tdep
-  ${_unwind_src}/include/tdep-${_unwind_cpu}
-  ${_unwind_src}/src
-)
-target_compile_options(unwind_ptrace_wrapped PRIVATE
-  -fno-common
-  -Wno-cpp
-)
-target_compile_definitions(unwind_ptrace_wrapped
-  PRIVATE -DHAVE_CONFIG_H
-          -D_GNU_SOURCE
-          -DNO_FRAME_POINTER
-  PUBLIC -D_UPT_accessors=_UPT_accessors_wrapped
-         -D_UPT_create=_UPT_create_wrapped
-         -D_UPT_destroy=_UPT_destroy_wrapped
-
-         -D_U${_unwind_cpu}_create_addr_space=_U${_unwind_cpu}_create_addr_space_wrapped
-         -D_U${_unwind_cpu}_destroy_addr_space=_U${_unwind_cpu}_destroy_addr_space_wrapped
-         -D_U${_unwind_cpu}_get_proc_name=_U${_unwind_cpu}_get_proc_name_wrapped
-         -D_U${_unwind_cpu}_get_reg=_U${_unwind_cpu}_get_reg_wrapped
-         -D_U${_unwind_cpu}_init_remote=_U${_unwind_cpu}_init_remote_wrapped
-         -D_U${_unwind_cpu}_step=_U${_unwind_cpu}_step_wrapped
-
-         -Dptrace=ptrace_wrapped
-)
-target_link_libraries(unwind_ptrace_wrapped PRIVATE
-  sapi::base
-  sandbox2::ptrace_hook
-)

cmake/protobuf.cmake

@@ -0,0 +1,64 @@
+# Copyright 2019 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/protobuf-populate")
+
+set(SAPI_PROTOBUF_GIT_REPOSITORY
+  https://github.com/protocolbuffers/protobuf.git
+  CACHE STRING "")
+set(SAPI_PROTOBUF_GIT_TAG v3.11.4 CACHE STRING "") # 2020-02-14
+set(SAPI_PROTOBUF_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/protobuf-src"
+                             CACHE STRING "")
+set(SAPI_PROTOBUF_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/protobuf-build"
+                             CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(protobuf-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(protobuf
+  GIT_REPOSITORY    \"${SAPI_PROTOBUF_GIT_REPOSITORY}\"
+  GIT_TAG           \"${SAPI_PROTOBUF_GIT_TAG}\"
+  GIT_SUBMODULES    \"cmake\" # Workaround for CMake #20579
+  SOURCE_DIR        \"${SAPI_PROTOBUF_SOURCE_DIR}\"
+  BINARY_DIR        \"${SAPI_PROTOBUF_BINARY_DIR}\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+set(protobuf_BUILD_TESTS FALSE CACHE BOOL "")
+set(protobuf_BUILD_SHARED_LIBS FALSE CACHE BOOL "")
+set(protobuf_WITH_ZLIB FALSE CACHE BOOL "")
+
+add_subdirectory("${SAPI_PROTOBUF_SOURCE_DIR}/cmake"
+                 "${SAPI_PROTOBUF_BINARY_DIR}" EXCLUDE_FROM_ALL)
+get_property(Protobuf_INCLUDE_DIRS TARGET protobuf::libprotobuf
+                                   PROPERTY INCLUDE_DIRECTORIES)

cmake/protobuf/CMakeLists.txt.in

@@ -1,28 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(protobuf-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(protobuf
-  GIT_REPOSITORY    https://github.com/protocolbuffers/protobuf.git
-  GIT_TAG           v3.11.4  # 2020-02-14
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/protobuf-src"
-  BINARY_DIR        "${CMAKE_BINARY_DIR}/protobuf-build"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-)

cmake/protobuf/Download.cmake

@@ -1,42 +0,0 @@
-# Copyright 2019 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks Protobuf at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/protobuf-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(protobuf_BUILD_TESTS OFF CACHE BOOL "")
-set(protobuf_BUILD_SHARED_LIBS OFF CACHE BOOL "")
-set(protobuf_WITH_ZLIB OFF CACHE BOOL "")
-
-add_subdirectory("${CMAKE_BINARY_DIR}/protobuf-src/cmake"
-                 "${CMAKE_BINARY_DIR}/protobuf-build" EXCLUDE_FROM_ALL)
-get_property(Protobuf_INCLUDE_DIRS TARGET protobuf::libprotobuf
-                                   PROPERTY INCLUDE_DIRECTORIES)

cmake/zlib.cmake

@@ -0,0 +1,98 @@
+# Copyright 2020 Google LLC
+#
+# 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
+#
+#     http://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.
+
+set(workdir "${CMAKE_BINARY_DIR}/_deps/zlib-populate")
+
+set(SAPI_ZLIB_URL https://mirror.bazel.build/zlib.net/zlib-1.2.11.tar.gz
+                  CACHE STRING "")
+set(SAPI_ZLIB_URL_HASH
+  SHA256=c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1
+  CACHE STRING "") # 2020-04-23
+set(SAPI_ZLIB_SOURCE_DIR "${CMAKE_BINARY_DIR}/_deps/zlib-src" CACHE STRING "")
+set(SAPI_ZLIB_BINARY_DIR "${CMAKE_BINARY_DIR}/_deps/zlib-build" CACHE STRING "")
+
+file(WRITE "${workdir}/CMakeLists.txt" "\
+cmake_minimum_required(VERSION ${CMAKE_VERSION})
+project(zlib-populate NONE)
+include(ExternalProject)
+ExternalProject_Add(zlib
+  URL           \"${SAPI_ZLIB_URL}\"
+  URL_HASH      \"${SAPI_ZLIB_URL_HASH}\"
+  SOURCE_DIR    \"${SAPI_ZLIB_SOURCE_DIR}\"
+  BINARY_DIR    \"${SAPI_ZLIB_BINARY_DIR}\"
+  PATCH_COMMAND patch -p1
+                < \"${SAPI_SOURCE_DIR}/sandboxed_api/bazel/external/zlib.patch\"
+  CONFIGURE_COMMAND \"\"
+  BUILD_COMMAND     \"\"
+  INSTALL_COMMAND   \"\"
+  TEST_COMMAND      \"\"
+)
+")
+
+execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+execute_process(COMMAND ${CMAKE_COMMAND} --build .
+                RESULT_VARIABLE error
+                WORKING_DIRECTORY "${workdir}")
+if(error)
+  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
+endif()
+
+set(ZLIB_FOUND TRUE)
+set(ZLIB_INCLUDE_DIRS ${SAPI_ZLIB_SOURCE_DIR})
+
+add_library(z STATIC
+  ${SAPI_ZLIB_SOURCE_DIR}/adler32.c
+  ${SAPI_ZLIB_SOURCE_DIR}/compress.c
+  ${SAPI_ZLIB_SOURCE_DIR}/crc32.c
+  ${SAPI_ZLIB_SOURCE_DIR}/crc32.h
+  ${SAPI_ZLIB_SOURCE_DIR}/deflate.c
+  ${SAPI_ZLIB_SOURCE_DIR}/deflate.h
+  ${SAPI_ZLIB_SOURCE_DIR}/gzclose.c
+  ${SAPI_ZLIB_SOURCE_DIR}/gzguts.h
+  ${SAPI_ZLIB_SOURCE_DIR}/gzlib.c
+  ${SAPI_ZLIB_SOURCE_DIR}/gzread.c
+  ${SAPI_ZLIB_SOURCE_DIR}/gzwrite.c
+  ${SAPI_ZLIB_SOURCE_DIR}/infback.c
+  ${SAPI_ZLIB_SOURCE_DIR}/inffast.c
+  ${SAPI_ZLIB_SOURCE_DIR}/inffast.h
+  ${SAPI_ZLIB_SOURCE_DIR}/inffixed.h
+  ${SAPI_ZLIB_SOURCE_DIR}/inflate.c
+  ${SAPI_ZLIB_SOURCE_DIR}/inflate.h
+  ${SAPI_ZLIB_SOURCE_DIR}/inftrees.c
+  ${SAPI_ZLIB_SOURCE_DIR}/inftrees.h
+  ${SAPI_ZLIB_SOURCE_DIR}/trees.c
+  ${SAPI_ZLIB_SOURCE_DIR}/trees.h
+  ${SAPI_ZLIB_SOURCE_DIR}/uncompr.c
+  ${SAPI_ZLIB_SOURCE_DIR}/zconf.h
+  ${SAPI_ZLIB_SOURCE_DIR}/zlib.h
+  ${SAPI_ZLIB_SOURCE_DIR}/zutil.c
+  ${SAPI_ZLIB_SOURCE_DIR}/zutil.h
+)
+add_library(ZLIB::ZLIB ALIAS z)
+target_include_directories(z PUBLIC
+  ${SAPI_ZLIB_SOURCE_DIR}
+)
+target_compile_options(z PRIVATE
+  -w
+  -Dverbose=-1
+)
+target_link_libraries(z PRIVATE
+  sapi::base
+)

cmake/zlib/CMakeLists.txt.in

@@ -1,30 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# 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
-#
-#     http://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.
-
-cmake_minimum_required(VERSION 3.12)
-project(zlib-download NONE)
-
-include(ExternalProject)
-ExternalProject_Add(zlib
-  URL https://mirror.bazel.build/zlib.net/zlib-1.2.11.tar.gz
-  URL_HASH SHA256=c3e5e9fdd5004dcb542feda5ee4f0ff0744628baf8ed2dd5d66f8ca1197cb1a1  # 2020-04-23
-  SOURCE_DIR        "${CMAKE_BINARY_DIR}/zlib-src"
-  PATCH_COMMAND     patch -p1
-                    < "@SAPI_SOURCE_DIR@/sandboxed_api/bazel/external/zlib.patch"
-  CONFIGURE_COMMAND ""
-  BUILD_COMMAND     ""
-  INSTALL_COMMAND   ""
-  TEST_COMMAND      ""
-  BUILD_IN_SOURCE TRUE
-)

cmake/zlib/Download.cmake

@@ -1,78 +0,0 @@
-# Copyright 2020 Google LLC
-#
-# 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
-#
-#     http://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.
-
-# Downloads and unpacks Abseil at configure time
-
-set(workdir "${CMAKE_BINARY_DIR}/zlib-download")
-
-configure_file("${CMAKE_CURRENT_LIST_DIR}/CMakeLists.txt.in"
-               "${workdir}/CMakeLists.txt")
-execute_process(COMMAND ${CMAKE_COMMAND} -G "${CMAKE_GENERATOR}" .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "CMake step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-execute_process(COMMAND ${CMAKE_COMMAND} --build .
-                RESULT_VARIABLE error
-                WORKING_DIRECTORY "${workdir}")
-if(error)
-  message(FATAL_ERROR "Build step for ${PROJECT_NAME} failed: ${error}")
-endif()
-
-set(_zlib_src "${CMAKE_BINARY_DIR}/zlib-src")
-
-set(ZLIB_FOUND TRUE)
-set(ZLIB_INCLUDE_DIRS ${_zlib_src})
-
-add_library(z STATIC
-  ${_zlib_src}/adler32.c
-  ${_zlib_src}/compress.c
-  ${_zlib_src}/crc32.c
-  ${_zlib_src}/crc32.h
-  ${_zlib_src}/deflate.c
-  ${_zlib_src}/deflate.h
-  ${_zlib_src}/gzclose.c
-  ${_zlib_src}/gzguts.h
-  ${_zlib_src}/gzlib.c
-  ${_zlib_src}/gzread.c
-  ${_zlib_src}/gzwrite.c
-  ${_zlib_src}/infback.c
-  ${_zlib_src}/inffast.c
-  ${_zlib_src}/inffast.h
-  ${_zlib_src}/inffixed.h
-  ${_zlib_src}/inflate.c
-  ${_zlib_src}/inflate.h
-  ${_zlib_src}/inftrees.c
-  ${_zlib_src}/inftrees.h
-  ${_zlib_src}/trees.c
-  ${_zlib_src}/trees.h
-  ${_zlib_src}/uncompr.c
-  ${_zlib_src}/zconf.h
-  ${_zlib_src}/zlib.h
-  ${_zlib_src}/zutil.c
-  ${_zlib_src}/zutil.h
-)
-add_library(ZLIB::ZLIB ALIAS z)
-target_include_directories(z PUBLIC
-  ${_zlib_src}
-)
-target_compile_options(z PRIVATE
-  -w
-  -Dverbose=-1
-)
-target_link_libraries(z PRIVATE
-  sapi::base
-)