Size of the bootloader when built on ghcr.io/stnolting/neorv32/sim:latest

[umarcor]

I tried updating pre-built memory images by running the following on a ghcr.io/stnolting/neorv32/sim:latest container:

make -C sw/bootloader bootloader
make -C sw/examples/demo_blink_red install

I was surprised to see that the size of the bootloader grew from 4056 bytes to 5112 bytes. See umarcor@add38da.

@stnolting, I'm I missing any build option, such as optimisation?

[stnolting]

Oh, that would be bad as the bootloader ROM is limited to 4096 bytes. 🤔

What RISC-V GCC version are you using?

Please try adding clean_all:

neorv32/sw/bootloader$ make clean_all bootloader
Memory utilization:
   text    data     bss     dec     hex filename
   4056       0       8    4064     fe0 main.elf
Compiling ../../sw/image_gen/image_gen
Installing bootloader image to ../../rtl/core/neorv32_bootloader_image.vhd

[umarcor]

@stnolting that was it! make -C sw/bootloader clean_all bootloader produced 4056 bytes.

For completeness, the GCC version I'm using is the one in the ghcr.io/stnolting/neorv32/sim container:

root@e42b2ad68e9e:/wrk# gcc --version
gcc (Debian 10.2.1-6) 10.2.1 20210110
Copyright (C) 2020 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

[stnolting]

gcc (Debian 10.2.1-6) 10.2.1 20210110

Wait, shouldn't that be the latest v13.2.0 (https://github.com/stnolting/riscv-gcc-prebuilt/releases/tag/rv32e-231223)?

https://github.com/stnolting/neorv32-setups/blob/11936c3dfd9022f17aac63333437acce311b7b1f/.github/sim.dockerfile#L15C2-L15C133

[stnolting]

Ah no, wait. Sorry 😅
This is the native GCC - not the RISC-V one.

root@e42b2ad68e9e:/wrk# gcc --version