Initial CMake-based build (#472)

Initial CMake-based build

This knows how to download and build googletest.

1 files changed, 54 insertions, 0 deletions

diff --git a/cmake/external/googletest.cmake b/cmake/external/googletest.cmake
new file mode 100644
index 0000000..66b2689
--- /dev/null
+++ b/cmake/external/googletest.cmake
@@ -0,0 +1,54 @@
+# Copyright 2017 Google
+#
+# 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.
+
+include(ExternalProject)
+ExternalProject_Add(
+  googletest_external
+  PREFIX googletest
+  URL "https://github.com/google/googletest/archive/release-1.8.0.tar.gz"
+  URL_HASH "SHA256=58a6f4277ca2bc8565222b3bbd58a177609e9c488e8a72649359ba51450db7d8"
+
+  CMAKE_ARGS
+      -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
+      -DBUILD_GMOCK:BOOL=OFF
+      -DBUILD_GTEST:BOOL=ON
+
+  # Cut down on scary log output
+  LOG_DOWNLOAD ON
+  LOG_CONFIGURE ON
+
+  INSTALL_COMMAND ""
+  UPDATE_COMMAND ""
+  TEST_COMMAND ""
+)
+
+ExternalProject_Get_Property(googletest_external source_dir binary_dir)
+
+# CMake requires paths in include_directories to exist at configure time
+file(MAKE_DIRECTORY ${source_dir}/googletest/include)
+
+add_library(gtest STATIC IMPORTED GLBOAL)
+set_target_properties(
+  gtest PROPERTIES
+  INTERFACE_INCLUDE_DIRECTORIES ${source_dir}/googletest/include
+  IMPORTED_LOCATION ${binary_dir}/googletest/${CMAKE_FIND_LIBRARY_PREFIXES}gtest.a
+)
+add_dependencies(gtest googletest_external)
+
+add_library(gtest_main STATIC IMPORTED GLOBAL)
+set_target_properties(
+  gtest_main PROPERTIES
+  IMPORTED_LOCATION ${binary_dir}/googletest/${CMAKE_FIND_LIBRARY_PREFIXES}gtest_main.a
+)
+add_dependencies(gtest_main googletest_external)