Qt + iperf3 = lconv has not been declared - c++

Question

Sorry for my english.
I try to add iperf3 (like static link library) to my Qt project (Qt version 4.8.5, OpenSuse 13.1), and has several errors:
g++ -c -pipe -g -Wall -W -D_REENTRANT -DQT_WEBKIT -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++ -I../lperftest -I/usr/include/QtCore -I/usr/include/QtGui -I/usr/include -I../lperf/include -I. -I../lperftest -I. -o main.o ../lperftest/main.cpp
In file included from /usr/include/c++/4.8/x86_64-suse-linux/bits/c++locale.h:41:0,
from /usr/include/c++/4.8/bits/localefwd.h:40,
from /usr/include/c++/4.8/string:43,
from /usr/include/QtCore/qstring.h:54,
from /usr/include/QtCore/qobject.h:48,
from /usr/include/QtCore/QObject:1,
from ../lperftest/main.cpp:9:
/usr/include/c++/4.8/clocale:53:11: error: '::lconv' has not been declared
using ::lconv;
^
/usr/include/c++/4.8/clocale:54:11: error: '::setlocale' has not been declared
using ::setlocale;
^
/usr/include/c++/4.8/clocale:55:11: error: '::localeconv' has not been declared
using ::localeconv;
^
In file included from /usr/include/c++/4.8/bits/localefwd.h:40:0,
from /usr/include/c++/4.8/string:43,
from /usr/include/QtCore/qstring.h:54,
from /usr/include/QtCore/qobject.h:48,
from /usr/include/QtCore/QObject:1,
from ../lperftest/main.cpp:9:
/usr/include/c++/4.8/x86_64-suse-linux/bits/c++locale.h:52:23: error: 'uselocale' was not declared in this scope
extern "C" __typeof(uselocale) __uselocale;
^
/usr/include/c++/4.8/x86_64-suse-linux/bits/c++locale.h:52:45: error: invalid type in declaration before ';' token
extern "C" __typeof(uselocale) __uselocale;
^
/usr/include/c++/4.8/x86_64-suse-linux/bits/c++locale.h: In function 'int std::__convert_from_v(__locale_struct* const&, char*, int, const char*, ...)':
/usr/include/c++/4.8/x86_64-suse-linux/bits/c++locale.h:75:53: error: '__gnu_cxx::__uselocale' cannot be used as a function
__c_locale __old = __gnu_cxx::__uselocale(__cloc);
^
/usr/include/c++/4.8/x86_64-suse-linux/bits/c++locale.h:100:33: error: '__gnu_cxx::__uselocale' cannot be used as a function
__gnu_cxx::__uselocale(__old);
^
../lperftest/main.cpp: At global scope:
../lperftest/main.cpp:11:5: warning: unused parameter 'argc' [-Wunused-parameter]
int main(int argc, char *argv[])
^
../lperftest/main.cpp:11:5: warning: unused parameter 'argv' [-Wunused-parameter]
make: *** [main.o] Error 1
When i try to add iperf3 to the only C++ project all is good. This error exist only in Qt project. Is any idea?

Answer 1

I have the same problem with iperf3 and Qt. Basically it seems that you have to use similar compilation for iperf3 library and your project (both gcc or both g++).
Let us know how it goes. Or share your solution if already done.
-- edit --
or do the following for iperf_api.h
extern "C" {
#include <iperf_api.h>
}