Enable CMake support

Install Abseil’s CMake support files. Some of these files are
autogenerated, and the generator produces files with a googletest
dependency if Abseil is built with unit tests enabled; to prevent this,
turn off unit tests.

2 files changed, 48 insertions, 0 deletions

diff --git a/debian/tests/cmake b/debian/tests/cmake
new file mode 100755
index 00000000..1eb04de9
--- /dev/null
+++ b/debian/tests/cmake
@@ -0,0 +1,45 @@
+#!/bin/sh -eu
+# 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
+#
+#     https://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.
+
+readonly TMP="$(mktemp -d)"
+trap "rm -rf \"$TMP\"" EXIT
+cd "$TMP"
+
+cat >test.cc <<EOF
+#include <absl/strings/numbers.h>
+
+int main(int argc, char* argv[]) {
+  int n;
+  if (!absl::SimpleAtoi(argv[1], &n)) {
+    return 1;
+  }
+  return n;
+}
+EOF
+
+cat >CMakeLists.txt <<EOF
+cmake_minimum_required(VERSION 3.5)
+project(test CXX)
+set(CMAKE_CXX_STANDARD 14)
+add_executable(test test.cc)
+find_package(absl REQUIRED)
+target_link_libraries(test absl::strings)
+EOF
+
+mkdir build
+cd build
+cmake ..
+make
+./test 0
diff --git a/debian/tests/control b/debian/tests/control
index fbbf5129..43dc87cb 100644
--- a/debian/tests/control
+++ b/debian/tests/control
@@ -14,3 +14,6 @@
 
 Tests: smoke
 Depends: @, g++, libgtest-dev
+
+Tests: cmake
+Depends: @, cmake (>= 3.5), g++, make