http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48713
--- Comment #1 from Ian Chivers <ian.chivers at chiversandbryan dot co.uk> 2011-04-21 15:44:07 UTC --- I have just downloaded and installed the latest development version on this system and still get the same message. d:\document\fortran\newbook\examples\ch28\gfortran>gfortran -v Using built-in specs. COLLECT_GCC=gfortran COLLECT_LTO_WRAPPER=c:/program files (x86)/gfortran/bin/../libexec/gcc/i586-pc-m ingw32/4.7.0/lto-wrapper.exe Target: i586-pc-mingw32 Configured with: ../gcc-trunk/configure --prefix=/mingw --enable-languages=c,for tran --with-gmp=/home/brad/gfortran/dependencies --disable-werror --enable-threa ds --disable-nls --build=i586-pc-mingw32 --enable-libgomp --enable-shared --disa ble-win32-registry --with-dwarf2 --disable-sjlj-exceptions --enable-lto Thread model: win32 gcc version 4.7.0 20110419 (experimental) [trunk revision 170140] (GCC) hope this helps.