VERY Strange interaction between strcoll, Qt, and locale

[Albert Astals Cid <tsdgeos at terra dot es>]

Hi, i have been speaking with Trolltech people with what i though was a Qt 
(their library) bug, but after both them and me looking at it, it seems it is 
a very strange interaction between strcoll, Qt, and the current system 
locale.

I send two attached programs. 

Both are the same except test4 has a QApplication object and test3 has not.
Both use strcoll to compare the same strings. 
Both give the same results with LC_ALL= en BUT if i set LC_ALL=es_ES test3 and 
test4 give to me DIFFERENT results.

Any idea?

Thanks for any input on this.

Albert.

P.S: I'm not subscribed to the list, so please keep me CC'ed

P.S: If you are not familiar with Qt a typical line to compile a QT program is
gcc -o test4 test4.cpp -I $(QtIncludePath) -L $(QtLibPath) -lqt-mt

#include <qapplication.h>
#include <qstring.h>

int main(int argc, char *argv[])
{
	printf("strcoll calls\n");
	printf("unit.cpp unit.h %d\n", strcoll("unit.cpp", "unit.h"));
	printf("unit.h unit.cpp %d\n", strcoll("unit.h", "unit.cpp"));
	printf("unit.cpp unitdescriptor.cpp %d\n", strcoll("unit.cpp", "unitdescriptor.cpp"));
	printf("unitdescriptor.cpp unit.cpp %d\n", strcoll("unitdescriptor.cpp", "unit.cpp"));
	printf("unit.h unitdescriptor.cpp %d\n", strcoll("unit.h", "unitdescriptor.cpp"));
	printf("unitdescriptor.cpp unit.h %d\n", strcoll("unitdescriptor.cpp", "unit.h"));
	return 0;
}

#include <qapplication.h>
#include <qstring.h>

int main(int argc, char *argv[])
{
	QApplication app(argc, argv);
	printf("strcoll calls\n");
	printf("unit.cpp unit.h %d\n", strcoll("unit.cpp", "unit.h"));
	printf("unit.h unit.cpp %d\n", strcoll("unit.h", "unit.cpp"));
	printf("unit.cpp unitdescriptor.cpp %d\n", strcoll("unit.cpp", "unitdescriptor.cpp"));
	printf("unitdescriptor.cpp unit.cpp %d\n", strcoll("unitdescriptor.cpp", "unit.cpp"));
	printf("unit.h unitdescriptor.cpp %d\n", strcoll("unit.h", "unitdescriptor.cpp"));
	printf("unitdescriptor.cpp unit.h %d\n", strcoll("unitdescriptor.cpp", "unit.h"));
	return 0;
}