Added CMake building system for libmemif

Added Cpack support for building libmemif DEB/RPM packages
Fixed compilation errors in libmemif test and examples

Change-Id: I59a237a4ca8eb08840857d5b0e666f3a8d74411d
Signed-off-by: msardara <msardara+fdio@cisco.com>

extras/libmemif/CMakeLists.txt

@@ -0,0 +1,68 @@
+# Copyright (c) 2017 Cisco and/or its affiliates.
+# 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 3.5 FATAL_ERROR)
+
+project(memif)
+set(CMAKE_C_STANDARD 11)
+
+include(CheckCCompilerFlag)
+include(CheckFunctionExists)
+
+set(VPP_SRC "${CMAKE_CURRENT_SOURCE_DIR}/../../src")
+execute_process(
+  COMMAND find ${VPP_SRC} -type d -name "cmake"
+  OUTPUT_VARIABLE CMAKE_DEPS_FOLDER
+  OUTPUT_STRIP_TRAILING_WHITESPACE
+)
+include(${CMAKE_DEPS_FOLDER}/library.cmake)
+include(${CMAKE_DEPS_FOLDER}/pack.cmake)
+
+if (NOT CMAKE_BUILD_TYPE)
+  message(STATUS "No build type selected, default to Release")
+  set(CMAKE_BUILD_TYPE "Release")
+endif ()
+
+set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -g -DMEMIF_DBG -DICMP_DBG")
+set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/lib)
+set(CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_PREFIX}/lib)
+set(CMAKE_INSTALL_MESSAGE NEVER)
+
+find_package(Threads REQUIRED)
+include_directories(${CMAKE_THREADS_INCLUDE_DIRS})
+
+check_function_exists(memfd_create HAVE_MEMFD_CREATE)
+if(${HAVE_MEMFD_CREATE})
+  add_definitions(-DHAVE_MEMFD_CREATE)
+endif()
+
+include_directories(src)
+set(LIBMEMIF memif)
+
+set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_SOURCE_DIR}/cmake")
+find_package(Check 0.10.0)
+if (CHECK_FOUND)
+  include_directories(${CHECK_INCLUDE_DIR})
+  add_definitions(-DMEMIF_UNIT_TEST)
+  add_subdirectory(test)
+  enable_testing()
+endif ()
+
+add_subdirectory(src)
+add_subdirectory(examples)
+
+add_vpp_packaging(
+  NAME "memif"
+  VENDOR "fd.io"
+  DESCRIPTION "Shared Memory Interface"
+)