Broken build of examples?

[Jatsekku]

I'm having hard time to compile provided examples (e.g. get-start/blink, get-start/helloworld). Apparently there is some linker problem.
Is it just me (or my env)? BTW, I would really appreciate some docs for SDK's build system.

For example (helloworld):

archlinux% cd bl_iot_sdk/customer_app/get-start/helloworld
archlinux% make
use existing version.mk file
LD build_out/helloworld.elf
/home/jatsekku/tmp/bl_iot_sdk/toolchain/riscv/Linux/bin/../lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: /home/jatsekku/tmp/bl_iot_sdk/customer_app/get-start/helloworld/build_out/coredump/libcoredump.a(bl_coredump.o): in function `cd_putchar':
/home/jatsekku/bl_iot_sdk/components/stage/coredump/bl_coredump.c:192: undefined reference to `_sp_base'
/home/jatsekku/tmp/bl_iot_sdk/toolchain/riscv/Linux/bin/../lib/gcc/riscv64-unknown-elf/10.2.0/../../../../riscv64-unknown-elf/bin/ld: /home/jatsekku/tmp/bl_iot_sdk/customer_app/get-start/helloworld/build_out/coredump/libcoredump.a(bl_coredump.o): in function `bl_coredump_print':
/home/jatsekku/bl_iot_sdk/components/stage/coredump/bl_coredump.c:409: undefined reference to `_sp_base'
collect2: error: ld returned 1 exit status
make: *** [/home/jatsekku/tmp/bl_iot_sdk/make_scripts_riscv/project.mk:470: /home/jatsekku/tmp/bl_iot_sdk/customer_app/get-start/helloworld/build_out/helloworld.elf] Error 1
archlinux%

[petergebruers]

I was able to build "blink" and "helloworld" by setting this (I am on macOS):

export CONFIG_LINK_ROM=1

... then run make clean then make

This selects a different part in components/platform/soc/bl602/bl602/evb/evb.mk in the SDK which links components/platform/soc/bl602/bl602/evb/ld/flash_rom.ld

That flash_rom.ld file has a definition for "_sp_base":

  .stack (NOLOAD)   :
  {
    PROVIDE ( _sp_base = . );
    . = ALIGN(16);
    . = . + __stack_size;
    PROVIDE( _sp_main = . );
    __freertos_irq_stack_top = .;
  }

Other "ld" scripts in the seem to be lacking this PROVIDE ( _sp_base = . ); incantation, it might be possible to add it there and then don't use my workaround (the "export" trick).

IMHO the SDK has been refactored to accommodate the BL702 and my there was some collateral damage, but I am too new to this project to understand the in-and-outs.

And then building succeeds. I haven't flashed the resulting binary, I haven't finished soldering my BL602 module yet :)

[ntn888]

the 'bl_iot_sdk/customer_app/get-start' is outdated...
i think one has to use the bl_iot_sdk/customer_app/peripheral/demo_gpio & bl_iot_sdk/customer_app/peripheral/demo_uart for the new updated applications...

i have opened an issue here to remove the get-start folder. i was also initially confused...