Using ccache with '-specs=nano.specs'

[floitsch]

I'm trying to cross-compile with arm-none-eabi-gcc. Our project needs the flag -specs=nano.specs.

Unfortunately that seems to break ccache. In the logs I now have:

[2024-01-24T10:36:58.306578 191738] Failed to lstat nano.specs: No such file or directory
[2024-01-24T10:36:58.306581 191738] While processing -specs=nano.specs: nano.specs is missing
[2024-01-24T10:36:58.306602 191738] Failed; falling back to running the real compiler

I tried to add a --ccache-skip in front of specs=nano.specs but that doesn't seem to have any effect.

How can I tell ccache to ignore the nano.specs file?
Or is there a way to tell ccache where to find the file?

[jrosdahl]

It makes sense that --ccache-skip should have the effect you expected, but it currently doesn't. However, you can use ignore_options/CCACHE_IGNOREOPTIONS instead.

Another workaround could be to specify the full path to nano.specs, e.g. with -specs=/usr/lib/arm-none-eabi/lib/nano.specs.