On 12 December 2012 22:50, Angelo Graziosi wrote: > When Cygwin had GCC-4.3.4 as GCC default compiler, I could compile an > application with these steps > > > g++ -c winbgim.cpp -o winbgim-g95.o > > g95 -O3 -Wall -mwindows basic_mods.f90 f03bgi.f90 f03eyes.f90 \ > winbgim-g95bis.o -L /lib/gcc/i686-pc-cygwin/4.5.3 -lstdc++ \ > -s -o f03eyes-g95 > > > Now, with GCC 4.5.3, I see linker errors: > > > g++ -c winbgim.cpp -o winbgim-g95.o > > g95 -O3 -Wall -mwindows basic_mods.f90 f03bgi.f90 f03eyes.f90 \ > winbgim-g95.o -L /lib/gcc/i686-pc-cygwin/4.5.3 -lstdc++ \ > -s -o f03eyes-g95 > /lib///libcygwin.a(_cygwin_crt0_common.o):_cygwin_crt0_common.cc:(.data+0x4): > undefined reference to `__real__Znaj' > /lib///libcygwin.a(_cygwin_crt0_common.o):_cygwin_crt0_common.cc:(.data+0xc): > undefined reference to `__real__ZdaPv' > > > (Notice that I have used the right PATH /lib/gcc/i686-pc-cygwin/4.5.3...) > > But if I compile winbgim.cpp with g++-3, > > g++-3 -c winbgim.cpp -o winbgim-g95.o > > g95 -O3 -Wall -mwindows basic_mods.f90 f03bgi.f90 f03eyes.f90 \ > winbgim-g95.o -L /lib/gcc/i686-pc-cygwin/4.5.3 -lstdc++ \ > -s -o f03eyes-g95 > > it works! It also works if I use an old winbgim-g95.o compiled with > gcc-4.3.4... > > > It seems I need to add some other library to command line... If you are targeting native Windows (no Cygwin) then you can use i686-w64-mingw32-gfortran and i686-w64-mingw32-g++ as replacements for g++ and g95 commands. You will have to install the appropriate MinGW related packages, though.
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