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Re: exception problem with cygwin - terminate called recursively

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On 2011-07-16 22:26:34 +0200, Paavo Helde said:

> Philipp Kraus <philipp.kraus@flashpixx.de> wrote in
> news:ivsj85$njn$1@online.de:
> 
>> On 2011-07-16 18:04:37 +0200, Paavo Helde said:
>> 
>>> Philipp Kraus <philipp.kraus@flashpixx.de> wrote in news:ivs5ac$c5s$1
>>> @online.de:
>>> 
>>>> I'm a little bit closer on the problem context, I have mixed C and
>>>> C++ code in the class that throws the exception.
>>> [...]
>>>> problem. I try to recompile my sources with the -fexceptions flag,
>>>> but that does not wort. Shoud I compile my C libraries with the
>>>> flag?
>>> 
>>> The -fexceptions flag should not have any effect on C++ code
>>> whatsoever. You need this for compiling any C code which is supposed
>>> to let C++ exceptions propagate through it. On Windows platform MSVC
>>> implements exceptions at the OS level so there is no such special
>>> flag needed for C code, but things may be different with cygwin or
>>> gcc.
>> 
>> I think this question is off-topic, but do you know a working solution
>> for g++? I have compiled all my libraries and my code with g++ / gcc,
>> so should I set the
>> -fexceptions flag on each library or only on my code?
> 
> I don't know if this is off-topic or not, there is too less information.
> For example it is not clear what you mean exactly by "mix of C and C++ in
> the class" and if "your code" is C or C++. Maybe you could post a minimal
> example demonstrating the problem?

It's very simple. I use the libxml2 functions for parsing XML data. The library
have some error function / callback function for detecting errors 
during the parsing.

eg:

my xmlclass {
   public:
         doxml( std::string p_xml ) {

              xmlParseMemory(p_xml.c_str)
              if (xmlErrorDetect()) {
                   xmlClear()
		throw std::runtime_error("error")
              }
         }
}

In my main function
{
	myxmlclass obj;
	try {
		obj.doxml("abcdef");
	} catch (...) {
		std::cout << "exception is caught" << std::endl;
	}
}


The calls with xml prefix are the calls of the libxml2. I have checked 
with gdb, the throw will be called, but not caught in the main. I can 
change
the (...) to anything, but I can't catch the exception. I have tested 
with std::exception, own exception, that derivated from std::exception. 
Under
the Cygwin g++ I can't catch it, same code under OSX and Linux works 
fine, the exception is caught and I can handle it.

> All I know that with Linux and gcc, all C code which has to be able to
> propagate exceptions through it must be compiled with -fexceptions.

The -fexceptions is enabled on default, so I think its correct.

I do not understand where the problem is and how I can solve it

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Re: exception problem with cygwin - terminate called recursively peter koch <peter.koch.larsen@gmail.com> - 2011-07-14 09:00 -0700
  Re: exception problem with cygwin - terminate called recursively Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-07-14 18:11 +0200
  Re: exception problem with cygwin - terminate called recursively Ian Collins <ian-news@hotmail.com> - 2011-07-15 07:36 +1200
  Re: exception problem with cygwin - terminate called recursively Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-07-16 15:56 +0200
    Re: exception problem with cygwin - terminate called recursively Paavo Helde <myfirstname@osa.pri.ee> - 2011-07-16 11:04 -0500
      Re: exception problem with cygwin - terminate called recursively Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-07-16 19:54 +0200
        Re: exception problem with cygwin - terminate called recursively Paavo Helde <myfirstname@osa.pri.ee> - 2011-07-16 15:26 -0500
          Re: exception problem with cygwin - terminate called recursively Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-07-16 23:59 +0200
            Re: exception problem with cygwin - terminate called recursively Paavo Helde <myfirstname@osa.pri.ee> - 2011-07-16 17:39 -0500
              Re: exception problem with cygwin - terminate called recursively Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-07-17 01:17 +0200
                Re: exception problem with cygwin - terminate called recursively Paavo Helde <myfirstname@osa.pri.ee> - 2011-07-17 02:30 -0500
                Re: exception problem with cygwin - terminate called recursively Philipp Kraus <philipp.kraus@flashpixx.de> - 2011-07-17 11:18 +0200

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