When compiling gfortran, I see the following warnings when doing a make all-gcc: ../../gcc/gcc/fortran/interface.c: In function 'compare_actual_formal': ../../gcc/gcc/fortran/interface.c:1718: warning: unknown conversion type character 'l' in format ../../gcc/gcc/fortran/interface.c:1718: warning: unknown conversion type character 'l' in format ../../gcc/gcc/fortran/interface.c:1718: warning: format '%L' expects type 'struct <anonymous> *', but argument 3 has type 'long unsigned int' ../../gcc/gcc/fortran/interface.c:1718: warning: too many arguments for format ../../gcc/gcc/fortran/interface.c:1723: warning: unknown conversion type character 'l' in format ../../gcc/gcc/fortran/interface.c:1723: warning: unknown conversion type character 'l' in format ../../gcc/gcc/fortran/interface.c:1723: warning: format '%L' expects type 'struct <anonymous> *', but argument 3 has type 'long unsigned int' ../../gcc/gcc/fortran/interface.c:1723: warning: too many arguments for format Any idea how I can get rid of them?