Linking problems with Reuse Startup Code Space option set

DSP C6413 

"Reuse Startup Code Space" in DSP/BIOS (5.32.03) configuration makes this GROUP appear in generated linker cmd file:

GROUP {
            .sysinitgap {. += 0x8;}
            .sysinit:
            .IRAM$heap: {
                _IRAM_base = IRAM$B;
                _IRAM_length = IRAM$L;
                . += 0x2000;
            }
        } START(IRAM$B), SIZE(IRAM$L) > IRAM

new linker (Code Generation Tools 6.1.2) complains:

error: symbol "IRAM$B" used in expression before it
   has been assigned a value

and

 error: symbol "IRAM$L" used in expression before it
   has been assigned a value

without this option set this part of the file looks like this: 

  .IRAM$heap: {
            IRAM$B = .;
            _IRAM_base = .;
            IRAM$L = 0x2000;
            _IRAM_length = 0x2000;
            . += 0x2000;
        } > IRAM

Any suggestions?