Okay .. found the problem myself: mingw wants the -lgfortran to appear after the file in the argument so this gcc -o hw hw.o -lgfortran works. Hi, I have a large project involving c++ and FORTRAN90 components. Everything works under Linux, but under Windows I can't seem to convince gcc or g++ to link objects created by gfortran. In short, what I need to do is create all my objects: the ones written in c++ with g++ and the ones written in fortran with gfortran; and then link them, preferably with g++. The linker step fails complaining about a bunch of undefined references, e.g. undefined reference to '_gfortran_st_write' But as far as I can see all of those are present in libgfortran.a, which is found and used by the linker. I could not even get a minimal example to work where I have a FORTRAN program like this WRITE(*,*) "Hello World!" and then compile gfortran -c -o hw.o hw.f90 and link gcc -o hw -lgfortran hw.o I am using the binaries available through the gfortran wiki (gcc 4.5). I get the same problem when I try to cross compile from fedora 11. Andreas
