I'm trying to compile some old fortran77 programs with gfortran and getting error with allocatable arrays.
If I define arrays in f90-style, like:
REAL*8,allocatable::somearray(:)
everything is fine, but in those old programs arrays defined as:
REAL*8 somearray[ALLOCATABLE](:)
which cause gfortran error output:
REAL*8,allocatable::somearray[ALLOCATABLE](:)
1
Fatal Error: Coarrays disabled at (1), use -fcoarray= to enable
I really wish to avoid rewriting whole programs to f90 style, so, could you please tell me, is there any way to force gfortran to compile it?
Thanks a lot.
For standard checking you can use -std flag
-std=std
Specify the standard to which the program is expected to conform, which may be one of f95',f2003', f2008',gnu', or `legacy'.
To "force" gfortran to compile your code, you have to use syntax it recognizes
I'd probably go for search and replace. For example,
sed 's/\(REAL\*8\)[[:blank:]]\+\([^[]\+\)\[ALLOCATABLE\]\(.*\)/\1, allocatable :: \2\3/' <old.source> > <new.source>
where sed is available.
Of course, be careful with sed :).
In any case, as it seems your code was written in some non-standard version of old
Fortran, you'll probably need to make changes in any case.
For what it's worth the Intel Fortran compiler (v13.something) compiles the following micro-program without complaint. This executes and writes 10 to the terminal:
REAL*8 somearray[ALLOCATABLE](:)
allocate(somearray(10))
print *, size(somearray)
end
Given the history of the Intel compiler I suspect that the strange declaration is an extension provided by DEC Fortran, possibly an early implementation of what was later standardised in Fortran 90.
