g77: problems with allocating more than 64M doubles or .5 G bytesto an array

[Dr M Braun <braunm at kiaat dot unisa dot ac dot za>]

Dear Maintainer of egcs-g77

I encounter the following problem:
when using g77 under linux to compile the following simple code
======= cut here =========
      real*8 b(768,1024*128)
      integer i,j,k
      do i=1,768
         do j=1,1024*128
            b(i,j)=i+j/5000d0
         enddo
      enddo
C     
      end
== cut here ==
I get the following error message at compile-time
eatmem_huge.f: In program `MAIN__':
eatmem_huge.f:1: 
         real*8 b(768,1024*128)
                ^
Array `b' at (^) is too large to handle

this is kind of  restrictive if you need to work with very large matrices
Under g++ this problem is not existent; you can allocate the sum of
free RAM and swap before he complains at run time!

It is 

your sincerely





Dr Moritz Braun                           Tel.: 27-12-4298006/8714/8027
Physics Department 	                  Fax.: 27-12-4293643
University of South Africa (UNISA)	  braunm@kiaat.unisa.ac.za
P.O. Box 392 				  0003 Pretoria South Africa