On Wed, Dec 07, 2005 at 03:13:03PM -0600, Dr. Germund Hojer wrote: > Your program compiles correctly both with g77(gcc-3.4.4) and gfortran > (gcc-4.0.2). The gfortran executable is twice the size. Output is the > same. Changing iargc for command_argument_count and getarg for > get_command_argument the program works under gfortran but not under g77. command_argument_count and get_command_argument are Fortran 2003 intrinsic procedure that have been added to gfortran. These are not and probably will never be available to g77. > In the GAMESS code, iargc and getarg work, when compiled with gcc (C code) > and g77 (Fortran code) and linked with g77. All with gcc-3.4.4 and > earlier. g77 does not make a distinction between an intrinsic procedure that it provides and external procedures that a user may provide. In other words, libg2c is a polluted name space. libgfortran tries to keep its namespace clean by prefixing intrinsic procedures with _gfortran_. This is why you can't find iargc_ and getarg_. I'm aware of two exceptions in libgfortran. > The same code compiled and linked with gcc and gfortran > (gcc-4.0.2) give the same error in the linking stage with "undefined > reference to .." both for the iargc/getarg and the > command_argument_count/get_command_argument combinations. > The C code in GAMESS refers to the parallel execution control, while the > Fortran code refers to the computational chemistry part, which is the main > part. In your code, change iargc_ and getarg_ to _gfortran_iargc and _gfortran_getarg_i4. Unfortunately, GAMESS isn't available without jumping through hoops, so there is no incentive to fix its broken code. -- Steve
