tests: add C++ 17 standard library test

Confirms build (and run) of C++17 applications that make use of STL
containers and other features.

Signed-off-by: Peter Bigot <[email protected]>

Author: pabigot

CODEOWNERS

@@ -368,6 +368,7 @@
 /subsys/testsuite/                        @nashif
 /subsys/usb/                              @jfischer-phytec-iot @finikorg
 /tests/                                   @nashif
+/tests/application_development/libcxx/    @pabigot
 /tests/arch/arm/                          @ioannisg
 /tests/boards/native_posix/               @aescolar
 /tests/boards/intel_s1000_crb/            @dcpleung @sathishkuttan

tests/application_development/libcxx/CMakeLists.txt

@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: Apache-2.0
+
+cmake_minimum_required(VERSION 3.13.1)
+include($ENV{ZEPHYR_BASE}/cmake/app/boilerplate.cmake NO_POLICY_SCOPE)
+project(cpp)
+
+FILE(GLOB app_sources src/*.cpp)
+target_sources(app PRIVATE ${app_sources})

tests/application_development/libcxx/prj.conf

@@ -0,0 +1,7 @@
+CONFIG_NEWLIB_LIBC=y
+CONFIG_CPLUSPLUS=y
+CONFIG_LIB_CPLUSPLUS=y
+CONFIG_STD_CPP17=y
+CONFIG_HEAP_MEM_POOL_SIZE=1024
+CONFIG_ZTEST=y
+CONFIG_ZTEST_STACKSIZE=2048

tests/application_development/libcxx/src/main.cpp

@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2019 Nordic Semiconductor ASA
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include <vector>
+#include <array>
+#include <functional>
+#include <ztest.h>
+
+BUILD_ASSERT(__cplusplus == 201703);
+
+std::array<int, 4> array = {1, 2, 3, 4};
+std::vector<int> vector;
+
+static void test_array(void)
+{
+	zassert_equal(array.size(), 4, "unexpected size");
+	zassert_equal(array[0], 1, "array[0] wrong");
+	zassert_equal(array[3], 4, "array[3] wrong");
+
+	std::array<u8_t, 2> local = {1, 2};
+	zassert_equal(local.size(), 2, "unexpected size");
+	zassert_equal(local[0], 1, "local[0] wrong");
+	zassert_equal(local[1], 2, "local[1] wrong");
+}
+
+static void test_vector(void)
+{
+	zassert_equal(vector.size(), 0, "vector init nonzero");
+	for (auto v : array) {
+		vector.push_back(v);
+	}
+	zassert_equal(vector.size(), array.size(), "vector store failed");
+}
+
+void test_main(void)
+{
+	TC_PRINT("version %u\n", (u32_t)__cplusplus);
+	ztest_test_suite(libcxx_tests,
+			 ztest_unit_test(test_array),
+			 ztest_unit_test(test_vector)
+		);
+
+	ztest_run_test_suite(libcxx_tests);
+}

tests/application_development/libcxx/testcase.yaml

@@ -0,0 +1,5 @@
+tests:
+  misc.app_dev.libcxx:
+    arch_exclude: posix
+    platform_exclude: qemu_x86_coverage qemu_x86_64
+    tags: cpp