Compiling on Ubuntu 22.04 fails

[larry104]

When trying to compile on ubuntu 22.04 I get the following error:
` 59%] Linking CXX executable bin/uscxml-transform

/usr/bin/ld: lib/libuscxml_transform.so.2.0.3: undefined reference to `uscxml::PromelaParser::~PromelaParser()'

/usr/bin/ld: lib/libuscxml_transform.so.2.0.3: undefined reference to `uscxml::PromelaParserNode::dump(unsigned long)'

/usr/bin/ld: lib/libuscxml_transform.so.2.0.3: undefined reference to `uscxml::PromelaParser::PromelaParser(std::__cxx11::basic_string<char, std::char_traits, std::allocator > const&)'

collect2: error: ld returned 1 exit status

make[2]: *** [CMakeFiles/uscxml-transform.dir/build.make:126: bin/uscxml-transform] Error 1

make[1]: *** [CMakeFiles/Makefile2:367: CMakeFiles/uscxml-transform.dir/all] Error 2

make: *** [Makefile:166: all] Error 2`

Any idea how to solve that?

[alexzhornyak]

1. You are trying to compile uscxml-transform application. It transfroms scxml state chart into C code. I am not sure that you need it. But if you need, you should enable Promela in Cmake and convince that Promela is installed on your system

2. I think that you need only SCXML library functions, in this case it will be enough to build only xerces, libevent, uscxml and uscxml-browser

[larry104]

yes, you are right if I just compile parts of it it compiles without error. Let me try to run some example if I get it to work.
Thanks again for your help!

[larry104]

When just building the targets uscxml and uscxml-browser I can't seem to find anywhere a package file so that qt6.x cmake knows with find_package(USCXML .. ) how to link and include the headers. Do I miss something here? At least I was able to manually compile and link a simple example though.

[larry104]

So, I finally got it to work that I can compile and run a state machine with an ecmascript datamodel. Can anyone point me to a simple example how to send and receive events?

[alexzhornyak]

You can use as origin this example

1. Here you can see how to subscribe to different state machine events

2. Here is an example how to pass event to state machine

[larry104]

Thanks! That helps a lot.