How to resolve an undefined reference to 'end' that is pointing to sysmem.c? C:/Users/dfrancoi/Documents/STMicroelectronics/LwIP_projects/stm32h750b-dk_lwip_V2/Debug/../Src/sysmem.c:57: undefined reference to `end'

[DFran.3]

I am trying to follow "How to create project for STM32H7 with Ethernet and LwIP stack working" posted on May 29, 2020 however I am getting an error undefined reference to end. When I double click the error it points to sysmem.c

Not being an embedded guy, I isolated the code section that is causing or contributing to the build error as:

  . = ABSOLUTE(0x30040000);

  *(.RxDecripSection)

  . = ABSOLUTE(0x30040060);

  *(.TxDecripSection)

  . = ABSOLUTE(0x30040200);

  *(.RxArraySection)

I made all the changes in the project except, the flash.id original code snip; the program builds OK but, does not work.

However, when I make all changes, these are the code images showing built errors:

  __bss_start__ = _sbss;

  *(.bss)

  *(.bss*)

  *(COMMON)

  . = ALIGN(4);

  _ebss = .;     /* define a global symbol at bss end */

  __bss_end__ = _ebss;

 } >RAM_D1

 /* Modification start */

 .lwip_sec (NOLOAD) : {

  . = ABSOLUTE(0x30040000);

  *(.RxDecripSection) 

  . = ABSOLUTE(0x30040060);

  *(.TxDecripSection)

  . = ABSOLUTE(0x30040200);

  *(.RxArraySection) 

 } >RAM_D2

 /* Remove information from the compiler libraries */

 /DISCARD/ :

 {

  libc.a ( * )

  libm.a ( * )

  libgcc.a ( * )

 }

 .ARM.attributes 0 : { *(.ARM.attributes) }

}

Thanks for your help in advance!

Delton

 Updated with project files.