Building out-of-tree kmod's with extra CFLAGS

[Philip Prindeville]

Hi,

I’m trying to do a version bump of dahdi-linux and it’s failing on the following:

static void inline t4_hdlc_xmit_fifo(struct t4 *wc, unsigned int span, struct t4_span *ts)

because it wants the word “inline” first, then “static” next, and finally the return type.

This is all over the code, unfortunately.  Looks like it needs to be compiled with “-Wno-old-style-declaration” to pass muster.

How does one modify the flags passed to out-of-tree kernel modules?

Also not understanding why it builds on my desktop (Ubuntu 24.04.2) but not on Github.

Thanks,

-Philip