Using -ipo_c and common block initialization

[justanotherengineer]

I am trying to compile a large multi-language simulation, a portion of which is Fortran. I am trying to optimizea subset of this Fortran code with the IPO but am getting multiply definedcommon blockissues. I am following the rules for common block initialization so I don't understand what's wrong.

Example:

file1.f has lines:

include 'tables.cmn'

...

x = A(3)*y

...

fileA.f has lines to initialize the tables.cmn data

BLOCKDATAINIT_TBL

include 'tables.cmn'

! initialize tables.cmn data

DATA A /1,2,3,4/

DATA B /1,2,3,4/

tables.cmn looks like:

integer A(4)

integer B(4)

common /tables/A,B

Compile command:

...

ifort -ipo_c file1.f file2.f file3.f file4.f -o temp.o

IPO: performing multi-file optimizations

IPO: generating object file temp.o

ifort: warning: multi-file optimation .o file produced; no link

...

ifort -c fileA.f -o fileA.o

ifort -c fileB.f -o fileB.o

icpc -c fileAA.cpp -o fileAA.o

...

icpc *.o -o simulator.exe

temp.o: (hex address) multiple definition of 'tables_'

fileA.o: first defined here

ld: Disabling relaxation: it will not work with multiple definitions

Itworks if I compile fileA.f with the command:

ifort -ipo_c -c fileA.f -o fileA.o

Unfortunately, I have about20 other files that have this same problem, and due to some post-compile object file manipulations, the solution cannot be worked in this manner.

Manual isn't clear on linking some .f with -ipo_c and some without. I am missing something?