Why doesn't assigning double to int cause a gcc warning?

Question

int i = 3.1 / 2 

does not raise any warnings, even with the -Wall option. Sometimes I would like to know where accuracy is lost. Why does gcc not support this warning, and msvc does support this?

thanks.

EDIT: my gcc -v shows

Configured with: ../../gcc-4.4.1/configure --prefix=/mingw --build=mingw32 --enable-languages=c,ada,c++,fortran,objc,obj-c++ --disable-nls --disable-win32-registry --enable-libgomp --enable-cxx-flags='-fno-function-sections -fno-data-sections' --disable-werror --enable-threads --disable-symvers --enable-version-specific-runtime-libs --enable-fully-dynamic-string --with-pkgversion='TDM-2 mingw32' --enable-sjlj-exceptions --with-bugurl=http://www.tdragon.net/recentgcc/bugs.php

Answer 1

-Wconversion warns of implicit conversion.