Compiler/TMS320C28346: Tell compiler to use data blocking in another translation unit using "extern" global variables

Tool/software: TI C/C++ Compiler

I have file hello.c

/**
 * hello.c
 */

#include "defs.h"

int main(void)
{
    a = 1;
    b = 1;
    c = 1;

    foo();
	return 0;
}

/**
 * hello.c
 */

#include "defs.h"

int main(void)
{
    a = 1;
    b = 1;
    c = 1;

    foo();
	return 0;
}

and i have foo.c

/*
 * foo.c
 *
 */
#include "defs.h"

#pragma SET_DATA_SECTION("sect")
int a;
int b;
int c;
#pragma SET_DATA_SECTION()

int foo()
{
    a++;
    b++;
    c++;

    return 0;
}

and i have defs.h

/*
 * defs.h
 *
 */

#ifndef DEFS_H_
#define DEFS_H_

int foo();

extern int a;
extern int b;
extern int c;

#endif /* DEFS_H_ */


the assembly code for foo.c in foo.asm looks like:

;***************************************************************
;* TMS320C2000 C/C++ Codegen                    PC v16.9.6.LTS *
;* Date/Time created: Fri Feb 07 10:07:33 2020                 *
;***************************************************************
	.compiler_opts --abi=coffabi --float_support=fpu32 --hll_source=on --mem_model:code=flat --mem_model:data=large --object_format=coff --silicon_version=28 --symdebug:none 
	.asg	XAR2, FP
	.global	_b
_b:	.usect	"sect",1,1,0
	.global	_c
_c:	.usect	"sect",1,1,0
	.global	_a
_a:	.usect	"sect",1,1,0
;	C:\ti\ccsv7\tools\compiler\ti-cgt-c2000_16.9.6.LTS\bin\ac2000.exe -@C:\\Users\\Vadim\\AppData\\Local\\Temp\\{DBEFC6D6-CDE5-4F19-886A-E7AD4BD4A397} 
	.sect	".text"
	.clink
	.global	_foo

;***************************************************************
;* FNAME: _foo                          FR SIZE:   0           *
;*                                                             *
;* FUNCTION ENVIRONMENT                                        *
;*                                                             *
;* FUNCTION PROPERTIES                                         *
;*                            0 Parameter,  0 Auto,  0 SOE     *
;***************************************************************

_foo:
        MOVW      DP,#_a                ; [CPU_U] 
        INC       @_a                   ; [CPU_] |17| 
        INC       @_b                   ; [CPU_] |18| 
        INC       @_c                   ; [CPU_] |19| 
        MOVB      AL,#0                 ; [CPU_] |21| 
        LRETR     ; [CPU_] 
        ; return occurs ; [] 

and in hello.asm

;***************************************************************
;* TMS320C2000 C/C++ Codegen                    PC v16.9.6.LTS *
;* Date/Time created: Fri Feb 07 10:07:33 2020                 *
;***************************************************************
	.compiler_opts --abi=coffabi --float_support=fpu32 --hll_source=on --mem_model:code=flat --mem_model:data=large --object_format=coff --silicon_version=28 --symdebug:none 
	.asg	XAR2, FP
;	C:\ti\ccsv7\tools\compiler\ti-cgt-c2000_16.9.6.LTS\bin\ac2000.exe -@C:\\Users\\Vadim\\AppData\\Local\\Temp\\{CB2ED061-6C5B-4791-8B03-04F530BE6B67} 
	.sect	".text"
	.clink
	.global	_main

;***************************************************************
;* FNAME: _main                         FR SIZE:   0           *
;*                                                             *
;* FUNCTION ENVIRONMENT                                        *
;*                                                             *
;* FUNCTION PROPERTIES                                         *
;*                            0 Parameter,  0 Auto,  0 SOE     *
;***************************************************************

_main:
        MOVW      DP,#_a                ; [CPU_U] 
        MOVB      @_a,#1,UNC            ; [CPU_] |15| 
        MOVW      DP,#_b                ; [CPU_U] 
        MOVB      @_b,#1,UNC            ; [CPU_] |16| 
        MOVW      DP,#_c                ; [CPU_U] 
        MOVB      @_c,#1,UNC            ; [CPU_] |17| 
        LCR       #_foo                 ; [CPU_] |19| 
        ; call occurs [#_foo] ; [] |19| 
        MOVB      AL,#0                 ; [CPU_] |23| 
        LRETR     ; [CPU_] 
        ; return occurs ; [] 
;**************************************************************
;* UNDEFINED EXTERNAL REFERENCES                              *
;**************************************************************
	.global	_b
	.global	_c
	.global	_a
	.global	_foo

My question how i tell compiler to use data_blocking also in hello.c with external variables, so DP optimization will be executed by compiler?

I know i can make a struct but i need actual variables because i need the adress in .map file for each variable.

Thanks.