All functions returns NULL value in Linux

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Hi,

All the function in my program is returning a NULL value after renaming all the .cpp file to .cc. This issue is only seen in Linux, but is working completely fine on Android platform.

Error: 

cp .libs/libtalkapp.la ../Platform/linux/lib/.libs/
cp: cannot create regular file `../Platform/linux/lib/.libs/': Is a directory
make[2]: *** [all] Error 1

Any help would be really helpful.

Thanks in advance,

Faez

Posted 4-Apr-12 1:43am

Faez Shingeri

Updated 4-Apr-12 1:52am

v3

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nv3 · Answer 1 · 2012-04-04T02:56:00

Solution 1

The error message given above seems to be unrelated to the problem you describe.

Regarding the problem that functions appear to return NULL values: Sometimes compilers derive from the file type whether the given file is in C or C++, which makes a big difference regarding the function signatures. Perhaps that is what causes the problem.

Posted 4-Apr-12 2:56am

nv3

Comments

Charmy from bangalore 4-Apr-12 9:03am

tried dat...doesnt work. :(

nv3 4-Apr-12 9:06am

Can you show a code example of a function returning NULL and specify

- how did you call it?
- was it a library function?
- how did you verify that it returned NULL?

Charmy from bangalore 4-Apr-12 9:18am

This is the function declaration.
virtual abc* add() const { return add_; }

Here add_ contains a value.

This add is called here.And here the value of add() is 0.
std::string id = add()->test();

Charmy from bangalore 4-Apr-12 9:18am

no,its not a library function.

nv3 4-Apr-12 10:01am

So add() is a virtual function of some class and add_ is a member of that class. But then you cannot call add() in the way you did. You must apply it to some class object, e.g. addObj.add(). Did you just leave that out of the code in your last message?

Another possibility is that member add_ is indeed 0. Can you set a breakpoint with your debugger at this spot?