Arraysizes in g77

Arraysizes in g77

[Alex Yu]

Hello all,

I have a program which is mostly written in Fortran.  It seems like that
g77's array limit is 512MB.  How can I increase the limit?

Alex

Re: Arraysizes in g77

[Toon Moene]

Alex Yu wrote:

> I have a program which is mostly written in Fortran.  It seems like that
> g77's array limit is 512MB.  How can I increase the limit?

This limitation will be removed in gcc/g77-3.1 - see the news item in
the URL in my signature.

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)

RE: Arraysizes in g77

[Alex Yu]

> This limitation will be removed in gcc/g77-3.1 - see the news item in
> the URL in my signature.

I compiled and installed 1/4/02 CVS.

I declaring 2 very large integer arrays: vst(271722256) and
wst(271722256) (1.87 Gb each).  I ran into a small problem by combining
them in a common statement:
	
	common /bigstuff/ vst,wst,marks,force2

The compiler complained that "bigstuff" was too big.  This concerns me,
since I'll be wanting to compile arrays of this size where vst and wst
are 64 bit floating point variables and for even larger sizes.

Toon, do you have any answer for this?

Thanks,
Alex

Re: Arraysizes in g77

[Toon Moene]

Alex Yu wrote:

> > This limitation will be removed in gcc/g77-3.1 - see the news item in
> > the URL in my signature.
> 
> I compiled and installed 1/4/02 CVS.
> 
> I declaring 2 very large integer arrays: vst(271722256) and
> wst(271722256) (1.87 Gb each).  I ran into a small problem by combining
> them in a common statement:
> 
>         common /bigstuff/ vst,wst,marks,force2
> 
> The compiler complained that "bigstuff" was too big.

Note that I need the exact error message to make sense out of this (and
a complete compilable example, with the exact source that you fed to the
compiler).

I.e., something like:

      INTEGER*8 VST, WST
      DIMENSION VST(271722256)
      DIMENSION WST(271722256)
C   DECLARATION OF OTHER STUFF, LIKE MARKS AND FORCE2
      COMMON /BIGSTUFF/ VST,WST,MARKS,FORCE2
      END

Thanks in advance,

-- 
Toon Moene - mailto:toon@moene.indiv.nluug.nl - phoneto: +31 346 214290
Saturnushof 14, 3738 XG  Maartensdijk, The Netherlands
Maintainer, GNU Fortran 77: http://gcc.gnu.org/onlinedocs/g77_news.html
Join GNU Fortran 95: http://g95.sourceforge.net/ (under construction)

RE: Arraysizes in g77

[Alex Yu]

> Note that I need the exact error message to make sense out of 
> a complete compilable example, with the exact source that you 

      parameter (maxn=20000)
      parameter (mxbits=(maxn*(maxn+1)+29)/30)
      integer vst(maxn*maxn),wst(maxn*maxn)
      integer*2 marks(mxbits),force2(2*mxbits)
      common /bigstuff/ vst,wst,marks,force2
      end

# g77-3.1 -O3 -fno-automatic -ffixed-line-length-none -static -o test
test.f  
test.f:3: size of variable `bigstuff_' is too large

Alex