The C/C++ compiler uses an uninitialized section called .sysmem for the C run-time memory pool used by malloc(). You can set the size of this memory pool at link time by using the --heap_size option. The syntax for the --heap_size option is:
--heap_size=size
The size must be a constant. This example defines a 4K byte heap:
cl6x --run_linker --heap_size=0x1000 /* defines a 4k heap (.sysmem section)*/
The linker creates the .sysmem section only if there is a .sysmem section in an input file.
The linker also creates a global symbol __TI_SYSMEM_SIZE and assigns it a value equal to the size of the heap. The default size is 1K bytes. See Section 8.6.1 for information about referring to linker symbols in C/C++ code. For more about C/C++ linking, see Section 8.10.