[Qt-creator] Loading source files while debugging mingw app with gdb

[Piotr Dobrogost]

Hi!

I'm on Windows using mingw 4.4.0 installed (in c:\mingw\4.4.0-qt) some time ago by Creator's installer. I have the following test app:

#include <ext/stdio_filebuf.h>
#include <iostream>
#include <fstream>
#include <string>

#include <QtCore>

using namespace std;

int main()
{
	ofstream ofs("test.txt");
	ofs << "Writing to a basic_ofstream object..." << endl;
	ofs.close();

	int posix_handle = fileno(::fopen("test.txt", "r"));
	__gnu_cxx::stdio_filebuf<char> filebuf(posix_handle, std::ios::in);
	istream is(&filebuf);

	string line;
	getline(is, line);
	cout << "line: " << line << std::endl;

	return 0;
}

which I compiled in debug mode from within Creator. During debugging, files in backtrace like fstream, fstream.tcc and others weren't loaded. I noticed in tooltips when hovering over them they have paths like \mingw\src\gccbf\mingw32\libstdc++-v3\include so I used Options/Debugger/Source Paths Mapping to map \mingw\src\gccbf\mingw32\libstdc++-v3\include path to C:\MinGW\4.4.0-qt\lib\gcc\mingw32\4.4.0\include\c++. This made these files available to debugger which started to load them during debugging.

My question is this; why debugger had no problem loading stdio_filebuf.h file (which is gcc's extension and lives in c:\mingw\4.4.0-qt\lib\gcc\mingw32\4.4.0\include\c++\ext\stdio_filebuf.h while it was unable to load other files?

I'll add that pressing F2 in Creator's editor finds both stdio_filebuf.h _and_ fstream header files.


-- 
Piotr Dobrogost

"Break C++ and the major implementations of Java and C# would also break" - Bjarne Stroustrup