Re: Boost::MQTT5 and boost 1.82.0?

From: Georg Gast (georg_at_[hidden])
Date: 2025-03-31 18:46:49

Am Dienstag, dem 25.03.2025 um 12:55 -0700 schrieb Christian Mazakas
via Boost:
> On Tue, Mar 25, 2025 at 10:25 AM Georg Gast via Boost
<[boost_at_[hidden]](mailto:boost_at_[hidden])>  
> wrote:
> 
> 
> > Hi Boost,
> > 
> > i read here [1] that boost::mqtt5 needs boost 1.82.0 but it is
> > published with 1.88.0 Beta1
> > 
> > How to use boost::mqtt5 with boost 1.82.0?
> >
> 
> 
> Looking at their CMakeLists.txt file here: mqtt5/CMakeLists.txt at
develop  
> · boostorg/mqtt5  
>
<[https://github.com/boostorg/mqtt5/blob/develop/CMakeLists.txt](https://github.com/boostorg/mqtt5/blob/develop/CMakeLists.txt)
>
> 
> It seems like the easiest thing to do is just clone it into the Boost
tree  
> and treat it like any other  
> library from there. Unless I'm misreading, it doesn't seem like this
> library is meant to be installed  
> by CMake on its own. It only has two modes: I'm a boost.mqtt
developer or  
> I'm going to install this  
> via BoostRoot.cmake.
> 
> Haven't tested it locally but if you clone it into a 1.82 tree, you
should  
> be able to:
> 
> Â Â Â  cmake -DBOOST_INCLUDE_LIBRARIES=mqtt5 -
DCMAKE_INSTALL_PREFIX=_install  
> .. && cmake --build . --target install -j20
> 
> - Christian
> 

A short information: I tried to add that sobmodule to my project but
the CMakeLists.txt from it didn`t work.
My CMake didn`t find Boost::asio. I added the following library to my
project with normal boost at 1.82.0

# This library can be removed if we are on Boost 1.88 or newer
add_library(Boost::mqtt5 INTERFACE IMPORTED GLOBAL)

find_package(Boost ${BOOST_VERSION}
        COMPONENTS
        system
        REQUIRED)

set_target_properties( Boost::mqtt5
 PROPERTIES IMPORTED_GLOBAL TRUE
)

target_include_directories (Boost::mqtt5 INTERFACE upstream/include)
target_link_libraries (Boost::mqtt5 INTERFACE Boost::system)

Apart from this, i could easily migrate my small project to
Boost::mqtt5 and boost 1.82.0

Thanks!

- Georg