[Qt-creator] Undefined reference to _imp___iob

[Gib Bogle]

Something odd is happening in the Qt Creator build.  When I look at the Compile 
Output window, I see that library directories of the various other compilers 
that I have installed have been located from my LIBRARY_PATH environment 
variable and added in:

-L'd:/Qt/2010.02.1/qt/lib'
-L'c:/Program Files/Intel/Compiler/11.0/039/fortran/mkl/ia32/lib'
-L'c:/Program Files/Intel/MKL/10.0.5.025/ia32/lib'
-L'c:/Program Files/Microsoft Visual Studio/DF98/LIB'
-L'c:/Program Files/Microsoft Visual Studio/VC98/LIB'
-L'c:/Program Files/Intel/Compiler/C++/10.1.011//IA32/Lib' 
-L'd:/Qt/2010.02.1/qt/lib'

Note also that .../qt/lib is referred to twice (although this is presumably 
harmless).  After exploring the Projects page I discovered that one can (in 
theory) Unset environmental variables.  Aha! I thought, I just need to Unset 
LIBRARY_PATH and all will be well.  But in fact I found that this made no 
difference - all these extra library paths are still in the compile command.

I then noticed that I could click a box labeled "Clear system environment", and 
apparently remove all env variables except for the Qt ones.  Alas, this had no 
effect either.

The next, rather drastic step is to use Control Panel to edit the environment 
variables.  This requires me to log off and log on as Administrator ... I'll 
report back.