topic Re: Facing Compilation error undefined reference to `_sbrk' in S32G

Facing Compilation error undefined reference to `_sbrk'

Prithviraj_k — Thu, 26 Mar 2026 09:46:56 GMT

Hello, I am using S32G399A Series ,
Earlier i was successfully able to build package but now i was trying to integrate HSE in it due to which i had to add hse sections in linker file [board-gnu.ldscript ].I have attached the image of the error .Could you please check this and let me know if you need further details.

Re: Facing Compilation error undefined reference to `_sbrk'

chenyin_h — Thu, 26 Mar 2026 11:03:00 GMT

Hello, @Prithviraj_k

Thanks for your post.

Would you mind introducing more about the background?

1. What project was built? Is it a custom application or examples from NXP?

2. Which version of the software packages(HSE, goldvip, etc.) involved?

Chenyin

Re: Facing Compilation error undefined reference to `_sbrk'

Prithviraj_k — Thu, 26 Mar 2026 12:12:23 GMT

Hello @chenyin_h ,

1.I am Building the Custom changes done on BSW Application over the GoldVip Package
2. Hse FW Version is 2_64

We are using GCC Compiler of 9.2
. TARGET = CORTEXM
. DERIVATE = S32G399
. TOOLCHAIN = gnu
. TOOLPATH_COMPILER = C:/NXP/S32DS.3.5/S32DS/build_tools/gcc_v9.2/gcc-9.2-arm32-eabi
. TRESOS_BASE = D:/EB_BSW/EB_GVIP/EB_GVIP
. PLUGINS_BASE = D:/EB_BSW/EB_GVIP/EB_GVIP/plugins.

If you need more Details please let me know .Thanks

Re: Facing Compilation error undefined reference to `_sbrk'

Prithviraj_k — Mon, 30 Mar 2026 06:48:13 GMT

Hello @chenyin_h ,

Please let me know if there is any Update on this issue.

Re: Facing Compilation error undefined reference to `_sbrk'

chenyin_h — Mon, 30 Mar 2026 09:40:13 GMT

Hello, @Prithviraj_k

I feel sorry for the late reply due on leave.

From the log you shared, seems the heap is introduced since sbrk is involved, the linker does not find the definition of sbrk, no sure if your application rely on the heap for allocating memory?

Which version GoldVIP is used?

Chenyin

Re: Facing Compilation error undefined reference to `_sbrk'

Prithviraj_k — Tue, 31 Mar 2026 10:28:42 GMT

Hello @chenyin_h ,

The RTD Version :SW32G_RTD_4.4_4.0.2
I have found a NXP Query with similiar issue : https://community.nxp.com/t5/Kinetis-Design-Studio/New-KDS-3-problem-undefined-reference-to-sbrk/m-p/444517#M4263

So i have tried to enable the LD Flags by using LINK_OPT += --specs=$(TOOLPATH_COMPILER)/arm-none-eabi/newlib/lib/nosys.specs and after making the above changes in makefile i am getting below error .

Re: Facing Compilation error undefined reference to `_sbrk'

chenyin_h — Tue, 31 Mar 2026 10:57:53 GMT

Hello, @Prithviraj_k

Thanks for your reply.

The symbol "end" needs to be defined in your linker file, which is used to set the location of the heap. It usually depends on your own implementation.

Chenyin