Error in building veins4.4 in Omnet++5.1 rc1

[Xiaofeng Liu]

Hello,

When I tried to build veins4.4 in Omnet++5.1, I got the following error:

veins/modules/mobility/traci/TraCIScenarioManagerLaunchd.cc: In member function ‘virtual void Veins::TraCIScenarioManagerLaunchd::init_traci()’:

veins/modules/mobility/traci/TraCIScenarioManagerLaunchd.cc:91:39: error: ‘class omnetpp::cXMLElement’ has no member named ‘tostr’; did you mean ‘str’?

  std::string contents = launchConfig->tostr(0);

                                       ^~~~~

make[1]: *** [../out/gcc-debug/src/veins/modules/mobility/traci/TraCIScenarioManagerLaunchd.o] Error 1

Makefile:163: recipe for target '../out/gcc-debug/src/veins/modules/mobility/traci/TraCIScenarioManagerLaunchd.o' failed

make[1]: Leaving directory '/home/michael/veins4.4/src'

Makefile:12: recipe for target 'all' failed

make: *** [all] Error 2

in the 

In the beginning I got the version mismatch error, but fixed after I deleted the old 5.0 folder. In my path there is also only 5.1's bin.

Would you please tell me how can fix the problem? Thank you very much!

[Xiaofeng Liu]

May I know if Omnet++5.1 supports veins4.4? Thank you very much!

[Adil Alsuhaim]

I had the same problem with Veins 4.5 & OMNET++ 5.1. I read on StackOverflow Forums that this is because Veins is NOT compatible with OMNET++ 5.1, and I believe this is because:

In OMNET++ 5.0 source code the file "cxmlelement.h" has the function

Code Snippet #1

std::string tostr(int level) const;

This function is NOT in OMNET++ 5.1

If you look further into OMNET++ 5.0 code, the C++ implementation of that header file. It's in the file  under omnetpp-5.0/src/sim/cxmlelement.cc

Code Snippet #2

std::string cXMLElement::tostr(int depth) const

{

std::stringstream os;

int i;

for (i = 0; i < depth; i++)

os << " ";

os << "<" << getTagName();

cXMLAttributeMap map = getAttributes();

for (cXMLAttributeMap::iterator it = map.begin(); it != map.end(); ++it)

os << " " << it->first << "=\"" << it->second << "\"";

if (!*getNodeValue() && !getFirstChild()) {

os << "/>\n";

return os.str();

}

os << ">";

os << getNodeValue();

if (!getFirstChild()) {

os << "</" << getTagName() << ">\n";

return os.str();

}

os << "\n";

for (cXMLElement *child = getFirstChild(); child; child = child->getNextSibling())

os << child->tostr(depth + 1);

for (i = 0; i < depth; i++)

os << " ";

os << "</" << getTagName() << ">\n";

return os.str();

}

A Workaround solution:

The error in Veins build is the only one I encounter. It occurs in the file TraCIScenarioManagerLaunchd.cc, line 93. If we silenced the error by saying content = "", the build completes, but you run into run-time errors due to malformed XML. So the good news is, that Veins 4.5 issue with OMNET++5.1 is only this function.

So, a solution you can do is to give the compiler what it wants and add that function to OMNET++ 5.1

This is what I did to get it to work:

• In my OMNET++ 5.1 directory, I edited the file ~/omnetpp-5.1/include/omnetpp/cxmlelement.h by adding the code in snippet #1 in it. I added the function header in line 160, right after the str() function, so it look like this

• /**

  * Returns a one-line description of the element.

  */

  virtual std::string str() const override;

  
  

  //internal : Added by Adil

  std::string tostr(int level) const;

  
  
  

• Now we need to also add the implementation of this function (Code Snippet #2) into the corresponding .cc file, which is in ~./omnetpp-5.1/src/sim/cxmlelement.cc
• Basically, we added the old function back to OMNET++ 5.1
• Now go back to ~/omnetpp-5.1 and "make" OMNET++ again since you have made modifications to it.
• Now go to your Veins directory and "make". This can also be done in OMNET++ IDE
• Before you run your Veins example, make sure you run sumo-launchd, because Veins project needs a connection with SUMO. It's something like this

• ~/veins-4.5/sumo-launchd.py -vv -c ~/sumo-0.29.0/sumo

Other Possible Solutions

You can probably fix this without modifying OMNET++ by adding the code for (Code Snippet #2) somewhere in the Veins 4.5 code, but you need some modifications, and I didn't feel like doing that.

Hope this helps,

Adil

[Alfonso Ariza Quintana]

You can replace tostr by print

 

 

void cXMLElement::print(std::ostream& os, int indentLevel)

 

std::ostream os;

elem-> print(os, 0);

std::stringstream ss;

ss << os.rdbuf();

std::string str = ss.srt();

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[min wang]

Good, it works, thank you.

在 2017年4月25日星期二 UTC+8上午12:45:35，Adil Alsuhaim写道：