sandboxed-api/cmake/gflags.cmake
Christian Blichmann 41e0ca0a68 CMake: Use min v3.13 and FetchContent
This updates the mininum required version of CMake to 3.13, which is
present in Debian Buster.

At the same time, move all of our dependency handling to use
`FetchContent_Declare()`, `FetchContent_Populate()` and
`FetchContent_MakeAvailable()`. Since the latter was ony introduced in
3.14, provide a simple "polyfill" implementation for that.

As an added benefit, the configure step for libffi and libunwind will
now not be re-run every time the `CMakeLists.txt` changes.

Other changes:
- Explicitly spell out that we're testing up to 3.22 in
  `cmake_minimum_version()`
- Rename `check_target()` to `sapi_check_target()` to avoid conflicts
  with Abseil.
2022-01-25 13:59:45 +01:00

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CMake

# 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.
FetchContent_Declare(gflags
GIT_REPOSITORY https://github.com/gflags/gflags.git
GIT_TAG addd749114fab4f24b7ea1e0f2f837584389e52c # 2020-03-18
)
set(GFLAGS_IS_SUBPROJECT TRUE)
set(GFLAGS_BUILD_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
set(GFLAGS_INSTALL_SHARED_LIBS ${SAPI_ENABLE_SHARED_LIBS})
set(GFLAGS_INSTALL_HEADERS OFF)
set(GFLAGS_BUILD_TESTING FALSE)
FetchContent_MakeAvailable(gflags)