[Mingw-users] GCC 3.4, possible bug?

[Jeff W. <jwi...@mf...>]

This is a very vague bug report, but I am hoping someone might provide some insight.

I will described the scenario and please read it all, because what is important is the entire scenario, not any one individual stage:

1. I have mingw GCC 3.3.3 installed.
2. I renamed c:/mingw/bin to c:/mingw/bin3.3.3
2. I upgrade to GCC 3.4 by installed the 3.4 core and 3.4 c++ tar files into c:\mingw
3. I compile STLport 4.5.3
   NOTE: I am using stlport as a DLL
4. I compile a test app that does this:
// contents of foo.txt is simply 12.4
std::ifstream ifs("foo.txt");
float f;
ifs >>f;
std::cout << "F = " << f << std::endl;

Output is:
F = 0 

It should say F = 12.4

5. I then renamed c:/mingw/bin to c:/mingw/bin3.4, and then
rename c:/mingw/bin3.3.3 to c:/mingw/bin (effectively reverting the binaries to the previous version)

6. Now I recompile STLport4.5.3 (as a DLL) and note that I am using the old 3.3.3 binaries.

7. Now I rerun my test app (I do NOT recompile it).  But it is using the recompiled DLL
And this time it works as expected.

I guess what I am trying to demonstrate is that only the DLL changed and it worked properly.

So I am inclined to think it is not a problem with the STLport 4.5.3 code, but a problem with the 3.4 compiler.

BTW: I also tried 4.6.0 and 5.0 version STLport and same deal (although I couldnt get it to compile on 3.3.3).

Does this scenario provide any insight into what can be done to fix this?

Jeff