Hi, I am using gfortran/gcc and need to run a fortran program that needs to create a block with more than 2Gb static memory. (I know this is not optimal, but it's not my code and it's too hard to change.) This is not possible in 32-bit systems due to addressing limitations, but is possible in 64-bit. For x86-64 systems I have managed to get around this problem by using the compiler flag -mcmodel=medium. However, I'm having problems compiling the same program in a PowerPC system (64-bit). It seems to me that the -mcmodel=medium only applies for x86-64 systems. Compiling the code without any special options will fail at linking, with this message: ld: total output size exceeds 2GB (2065MB) If I include the -mcmodel=medium option then gfortran says it doesn't know it: $ gfortran -O2 -mpowerpc64 -mcmodel=medium -c -o msline.o msline.f f951: error: unrecognized command line option "-mcmodel=medium" I have been using -mpowerpc64 to ensure it compiles a 64-bit version for the PowerPC, but I don't know how (or if it's possible) to address more than 2Gb of static memory in this architecture. I am using Mac OS X 10.5.6, with gcc/gfortran from hpc.sourceforge.net. The gcc version is 4.4: $ gfortran --version GNU Fortran (GCC) 4.4.0 20080801 (experimental) (I also tried with gcc 4.3 compiled in the same machine with MacPorts, but the problem persists.) Anyone have any ideas on how to do this in PowerPC? Thanks! Tiago
