Set rpath so ngraph.so can find openmpi libraries (#3680)

* Add cmake util to find os type

* Change CENTOS to REDHAT

* Set RPATH based on OS type

* Remove debug strings

CMakeLists.txt

@@ -73,6 +73,11 @@ if (UNIX AND NOT APPLE)
     set(LINUX TRUE)
 endif()
 
+if (LINUX)
+    include(find_os_version)
+    find_os_version()
+endif()
+
 if ("${CMAKE_GENERATOR}" MATCHES "^Visual Studio.*$")
     set(MSVS TRUE)
 endif()
@@ -326,6 +331,15 @@ if (LINUX)
         set(CMAKE_BUILD_RPATH "$ORIGIN")
         set(CMAKE_INSTALL_RPATH "$ORIGIN")
     endif()
+    if (UBUNTU)
+        set(CMAKE_BUILD_RPATH "${CMAKE_BUILD_RPATH}:/usr/lib/x86_64-linux-gnu/openmpi4/lib")
+        set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_RPATH}:/usr/lib/x86_64-linux-gnu/openmpi4/lib")
+    elseif (REDHAT)
+        set(CMAKE_BUILD_RPATH "${CMAKE_BUILD_RPATH}:/usr/lib64/openmpi4/lib64")
+        set(CMAKE_INSTALL_RPATH "${CMAKE_INSTALL_RPATH}:/usr/lib64/openmpi4/lib64")
+    endif()
+    message(STATUS "CMAKE_BUILD_RPATH   ${CMAKE_BUILD_RPATH}")
+    message(STATUS "CMAKE_INSTALL_RPATH ${CMAKE_INSTALL_RPATH}")
 endif()
 
 #-----------------------------------------------------------------------------------------------

cmake/Modules/find_os_version.cmake

+# ******************************************************************************
+# Copyright 2017-2019 Intel Corporation
+#
+# 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.
+# ******************************************************************************
+
+function(find_os_version)
+    set(UBUNTU FALSE PARENT_SCOPE)
+    set(REDHAT FALSE PARENT_SCOPE)
+    if(EXISTS /etc/debian_version)
+        set(UBUNTU TRUE PARENT_SCOPE)
+    elseif(EXISTS /etc/redhat-release)
+        set(REDHAT TRUE PARENT_SCOPE)
+    endif()
+endfunction()