User`s guide

Using DSP/BIOS with the Run-Time Support Library
Program Generation 2-19
Note:
It is recommended to use the DSP/BIOS library version of malloc, free,
memalign, calloc and realloc within DSP/BIOS applications. When you are
not referencing these functions directly in your application but call another
run-time support function which references one or more of them, add '-u
_symbol', (for example, -u _malloc) to your linker options. The -u linker
option introduces a symbol, such as malloc, as an unresolved symbol into
the linker's symbol table. This causes the linker to resolve the symbol from
the DSP/BIOS library rather than the run-time support library. If in doubt,
you can examine your map file for information on the library sources of your
application.