The next step is to add the content of the new section into the Microcontroller memory segment you have reserved. This is done in the sections segment of the LCF.
The code below creates a new section called .rom_symbols, then the label __ROM_SYMBOLS points to the address where the section begins. Then *(.romsymbols) instruction is used to tell the linker that all the code referenced with this word is going to be placed in section .rom_symbols.
Finally you close the section telling the linker that this content is going to be located in segment myrom.
Edit your LCF as shown below.
.rom_symbols :
{
__ROM_SYMBOLS = . ; #start address of the new symbol area
. = ALIGN (0x4);
*(.romsymbols) #actual data matching pragma directives.
. = ALIGN (0x4);
} > myrom
Please note that in the MAP file you can notice newly created ROM section.