Add missing header

In some cases the definition of the alias target fails, because of
target visibility problems.

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,9 @@
+Replace me with your description.
+
+---
+
+Checklist:
+
+* [ ] Rebased against `dev` branch
+* [ ] My name is in the resp. CONTRIBUTORS/AUTHORS file
+* [ ] Followed [the seven rules of great commit messages](https://chris.beams.io/posts/git-commit/#seven-rules)

README.md

@@ -23,7 +23,7 @@ In addition to this core functionality FairMQ provides a framework for creating
 are communicating through message passing. FairMQ does not only allow the user to use different transport but also to mix them; i.e: A Device can communicate using different transport on different channels at the same time. Device execution is modelled as a simple state machine that
 shapes the integration points for the user task. Devices also incorporate a plugin system for runtime configuration and control.
 Next to the provided devices and plugins (e.g. [DDS](https://github.com/FairRootGroup/DDS))
-the user can extened FairMQ by developing his own plugins to integrate his devices with external
+the user can extend FairMQ by developing his own plugins to integrate his devices with external
 configuration and control services.
 
 FairMQ has been developed in the context of its mother project [FairRoot](https://github.com/FairRootGroup/FairRoot) -
@@ -49,6 +49,7 @@ a simulation, reconstruction and analysis framework.
 
 | Stable release | Date | API Docs |
 | --- | --- | --- |
+| [**1.2.3**](https://github.com/FairRootGroup/FairMQ/releases/tag/v1.2.3) | May 2018 | [link](https://fairrootgroup.github.io/FairMQ/v1.2.3/index.html) |
 | [**1.2.1**](https://github.com/FairRootGroup/FairMQ/releases/tag/v1.2.1) | May 2018 | [link](https://fairrootgroup.github.io/FairMQ/v1.2.1/index.html) |
 | [**1.2.0**](https://github.com/FairRootGroup/FairMQ/releases/tag/v1.2.0) | May 2018 | [link](https://fairrootgroup.github.io/FairMQ/v1.2.0/index.html) |
 
@@ -80,14 +81,16 @@ set(CMAKE_PREFIX_PATH /path/to/FairMQ_install_prefix ${CMAKE_PREFIX_PATH})
 find_package(FairMQ)
 ```
 
-`find_package(FairMQ)` will define an imported target `FairMQ::FairMQ` (An alias `FairRoot::FairMQ` is also defined (if you use CMake 3.11+) for backwards compatibility, but it is deprecated).
+`find_package(FairMQ)` will define an imported target `FairMQ::FairMQ`.
 
 In order to succesfully compile and link against the `FairMQ::FairMQ` target, you need to discover its public package dependencies, too.
 
 ```cmake
 find_package(FairMQ)
-find_package(FairLogger ${FairMQ_FairLogger_VERSION})
-find_package(Boost ${FairMQ_Boost_VERSION} COMPONENTS ${FairMQ_BOOST_COMPONENTS})
+if(FairMQ_FOUND)
+  find_package(FairLogger ${FairMQ_FairLogger_VERSION})
+  find_package(Boost ${FairMQ_Boost_VERSION} COMPONENTS ${FairMQ_BOOST_COMPONENTS})
+endif()
 ```
 
 Of course, feel free to customize the above commands to your needs.
@@ -96,8 +99,10 @@ Optionally, you can require certain FairMQ package components and a minimum vers
 
 ```cmake
 find_package(FairMQ 1.1.0 COMPONENTS nanomsg_transport dds_plugin)
-find_package(FairLogger ${FairMQ_FairLogger_VERSION})
-find_package(Boost ${FairMQ_Boost_VERSION} COMPONENTS ${FairMQ_BOOST_COMPONENTS})
+if(FairMQ_FOUND)
+  find_package(FairLogger ${FairMQ_FairLogger_VERSION})
+  find_package(Boost ${FairMQ_Boost_VERSION} COMPONENTS ${FairMQ_BOOST_COMPONENTS})
+endif()
 ```
 
 When building FairMQ, CMake will print a summary table of all available package components.

cmake/FairMQConfig.cmake.in

@@ -32,9 +32,4 @@ set(CMAKE_MODULE_PATH ${@PROJECT_NAME@_CMAKEMODDIR} ${CMAKE_MODULE_PATH})
 ### Import targets
 include(@PACKAGE_CMAKE_INSTALL_PREFIX@/@PACKAGE_INSTALL_DESTINATION@/@PROJECT_EXPORT_SET@.cmake)
 
-### Alias target for backwards compat (DEPRECATED)
-if((NOT TARGET FairRoot::@PROJECT_NAME@) AND (CMAKE_VERSION VERSION_GREATER 3.10.99))
-  add_library(FairRoot::@PROJECT_NAME@ ALIAS @PROJECT_NAME@::@PROJECT_NAME@)
-endif()
-
 @PACKAGE_COMPONENTS@

fairmq/tools/Process.cxx

@@ -11,6 +11,7 @@
 #include <boost/process.hpp>
 
 #include <iostream>
+#include <sstream>
 
 using namespace std;