Enabling HTTPd breaks the whole project

[abeslic]

Hi, I'm playing around with lwIP on my Nucleo-H743ZI and I was able to make ping work, udp/tcp echo and snmp too. But when I enable HTTPd the project doesn't wont do compile I just get a lot of undefined references, I tried to make a new project and same thing happened. This are the compiler error messages that I get:

Core/Src/main.c:113: undefined reference to `httpd_init' 

LWIP/App/lwip.o: in function `MX_LWIP_Init':
LWIP/App/lwip.c:80: undefined reference to `lwip_init'
LWIP/App/lwip.c:88: undefined reference to `netif_add'
LWIP/App/lwip.c:91: undefined reference to `netif_set_default'
LWIP/App/lwip.c:96: undefined reference to `netif_set_up'
LWIP/App/lwip.c:101: undefined reference to `netif_set_down'
LWIP/App/lwip.c:105: undefined reference to `netif_set_link_callback'
LWIP/App/lwip.c:112: undefined reference to `ethernet_input'
LWIP/App/lwip.c:161: undefined reference to `sys_check_timeouts'
LWIP/Target/ethernetif.c:202: undefined reference to `memp_init_pool'
LWIP/Target/ethernetif.c:348: undefined reference to `pbuf_free'
LWIP/Target/ethernetif.c:431: undefined reference to `etharp_output'
LWIP/Target/ethernetif.c:441: undefined reference to `memp_free_pool'
LWIP/Target/ethernetif.c:660: undefined reference to `netif_set_down'
LWIP/Target/ethernetif.c:661: undefined reference to `netif_set_link_down'
LWIP/Target/ethernetif.c:699: undefined reference to `netif_set_up'
LWIP/Target/ethernetif.c:700: undefined reference to `netif_set_link_up'
LWIP/Target/ethernetif.c:709: undefined reference to `memp_malloc_pool'
LWIP/Target/ethernetif.c:718: undefined reference to `pbuf_alloced_custom'

I did include httpd.h in main and I try manually including other libs but it didn't help. When disable http it compiles normally.

I'm new to this so any advice will be helpful. 

Thanks in advance

Alex

[xavier.clement87]

HI everybody, have exactly the same problem on STM32CubeIDE v1.13.1 and MCU package for STMH7 v 1.11.1. I develop for nucleo-h743ZI board. Example LwIP_HTTP_Server_Raw compile and works with mods of pin connection for ethernet phy 

I expect one of us have solution :)

[Pavel A.]

>  I was able to make ping work, udp/tcp echo and snmp too.

This is super cool, congrats!

> when I enable HTTPd 

What exactly does this mean? Where do you enable it?

[xavier.clement87]

look at joined screen capture to see  the meaning of "httpd activation" in the tab with the same name 

[MWB_CHa]

Hi @xavier.clement87 

Simply generating a project using STM32CubeMX with HTTPd activated doesn't seem to present an issue.

Could you please share details about the version of STM32CubeMX you're using and the IDE you compile with ? (IAR, STM32CubeIDE, Keil, ..).

If possible to share a simple STM32CubeMX project ( .ioc) that reproduce the issue, it would help.

Thanks. 

[xavier.clement87]

Hi

I compile the joined example with STM32CubeIDE V 1.13.1 and STM32CubeH7 Firmware Package V1.11.0 / 04-Nov-2022.

With httpd disabled in lwip settings (in ioc window) all compile and televerse correctly, ping to the address fixed (192.168.1.250) is OK.

When httpd enabled -> compilation error like Abeslic described in his post

Best regards

[LCE]

I remember that I had similar problems, it took some time to sort the includes for the header files.
But I can't remember what I exactly did...

[abeslic]

Hi @Pavel A. 

sorry for not replying sooner.

I figured out what was the problem, when I enable HTTPd the IDE excludes the hole lwIP lib from the build, I just had to manually unexcluded and it worked like charm. 

[abeslic]

Hi @xavier.clement87 

Try manually to unexclud lwIP lib from the build.

[OriginalCDV]

Hi abeslic,

I am bashing me head against the wall with this same issue. However I cannot see where lwIP lib is getting excluded from the build. (I am still new to STM32Cube - so probably missing something obvious).

Can you provide more detail on how to unexclude from the build?

Thanks!