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So I wanted to see what would happen to a basic Qt4 Application compiled from a simple Makefile when run through Valgrind. What would be causing these leaks? I am deleting any dynamically allocated objects on my end. Also when exiting the program I only click on the close (X) up in the upper right corner. Do GUI libs just not "free()" any of the memory they malloc()'d ? The Makefile reduced from qmake command is: ####### Compiler, tools and options CXX = g++ CXXFLAGS = -pipe -O2 -Wall -W LIBS_INCLUDE = ${HOME} INCPATH = -I$(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/mkspecs/default \ -I. \ -I$(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/include/QtCore \ -I$(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/include/QtGui \ -I$(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/include LINK = g++ LFLAGS = -Wl,-O1 -Wl,-rpath,$(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/lib LIBS = $(SUBLIBS) -L$(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/lib -lQtGui -lQtCore -lpthread QMAKE = $(LIBS_INCLUDE)/QtSDK/Desktop/Qt/473/gcc/bin/qmake OBJECTS_DIR = ./ SOURCES = main.cpp OBJECTS = main.o QMAKE_TARGET = Main TARGET = Main ####### Build rules first: all all: $(TARGET) $(TARGET): $(OBJECTS) $(LINK) $(LFLAGS) -o $(TARGET) $(OBJECTS) $(OBJCOMP) $(LIBS) ####### Compile main.o: main.cpp $(CXX) -c $(CXXFLAGS) $(INCPATH) -o main.o main.cpp The only source code is: int main(int argc, char *argv[]) { QApplication app(argc, argv); QWidget window; window.resize( 320,240 ); window.setWindowTitle( QApplication::translate( "toplevel", "Top-level Widget" ) ); window.show( ); QPushButton *button = new QPushButton( QApplication::translate( "childwidget", "Press me"), &window ); button->move( 100, 100 ); button->show( ); delete button;

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