Hi,

On 2022-01-19 13:16, Michael Opdenacker wrote:

Greetings,

I reused a simple "hello" recipe and added a non-matching checksum to it:

...
SRC_URI = "file://helloworld.c"
SRC_URI[md5sum] = "34f0efd76b4f18888888888833cdd129"
...

The rest of the recipe comes from
https://git.openembedded.org/openembedded-core/tree/meta-skeleton/recipes-skeleton/hello-single.

Why doesn't Bitbake stop, reporting that the checksum doesn't match the
source file?
Anyway, why does the recipe build without a checksum? Shouldn't
checksums be mandatory?

No they are not mandatory for all fetchers. They are only used for content downloaded from non-local archives. https://docs.yoctoproject.org/bitbake/bitbake-user-manual/bitbake-user-manual-fetching.html#the-download-fetch


https://github.com/openembedded/bitbake/blob/32180d5057c818a69987aada482e82acf3c72ef2/lib/bb/fetch2/__init__.py#L1268

^^ here you can see the selection of URI's that automatically needs a checksum.

Best regards,
/Peter