Qt Creator release mode undefined references to std::out_of_range - qt

Question

I'm writing a small C++ program (with a GUI) with Qt Creator and compiling with MinGW. Everything works fine when I compile the project in debug mode but as soon as I move to release mode I get compiler errors:
undefined reference to 'std::out_of_range::~out_of_range()' thread.cpp
When I click on the error I also get:
File not found: thread.cpp
I have looked through my Boost installation and found thread.cpp and it should be on the include path for my project.
Any ideas?
EDIT: Here is my .pro file:
#-------------------------------------------------
#
# Project created by QtCreator 2012-08-10T12:09:39
#
#-------------------------------------------------
QT += core gui
TARGET = GeneDropWin
TEMPLATE = app
SOURCES += main.cpp \
genedrop.cpp \
mainbody.cpp \
biofunctions.cpp \
fileio.cpp \
settings.cpp
HEADERS += genedrop.h \
geneclasses.h \
paramclass.h \
mainbody.h \
biofunctions.h \
fileio.h \
geneclasses.h \
settings.h
FORMS += genedrop.ui \
settings.ui
#Stuff I've added
INCLUDEPATH += "C:\\Program Files\\boost_1_50_0"
LIBS += -L"C:\\Program Files\\boost_1_50_0\\stage\\lib" -lboost_thread-mgw46-mt-1_50 -lboost_system-mgw46-mt-1_50 -lboost_date_time-mgw46-mt-1_50 -lboost_chrono-mgw46-mt-1_50
CONFIG += static \
release
RESOURCES += \
NIABLogo.qrc

Answer 1

Ok, the problem is fixed but perhaps not completely understood. I fixed it by switching compiler to MSVC and changing the syntax for the linker options (e.g. -lboost_thread-mgw46-mt-1_50 -> -llibboost_thread-vc100-mt-1_50), compiles without an issue now. I will put forward my reasoning as to what I think may have been the problem but would appreciate a better answer if wrong:
Although I thought I had built the Boost libraries with MinGW when looking through the installation I found a number of folders mentioning msvc instead (e.g. ...boost\bin.v2\libs\date_time\build_msvc-10.0) which suggested to me that I had built it with MSVC.
The linker error claimed not to be able to find files associated with thread.cpp.
Looking at the thread folder of the build directory all the .obj and .lib files had msvc-10.0 folders in their path.
Thus I think that the MinGW compiler was looking for boost objects within a non-existent MinGW folder and so was failing. The fact that it worked under debug mode I guess relates to a less-constrained search for files.