On Thu, 7 Jan 2021 at 16:52, Eric Farman <farman@linux.ibm.com> wrote:
On 1/6/21 2:03 PM, Peter Xu wrote:
Could I ask why the const.h is installed into include/standard-headers/linux
rather than linux-headers/linux? When I was working on my version I failed to
figure out the difference.
Considering the main difference is whether the header file is copied
directly or edited with a bunch of substitutions, and const.h doesn't
get modified by those substitutions, I suppose it could go in
linux-headers itself.
No, it can't, because linux-headers/ only goes on the include
path when on a Linux host and on a CPU architecture with KVM support,
whereas include/standard-headers/ headers are available and
used on all host OSes/architectures.
Because include/standard-headers/linux/ethtool.h will end up
with a line
#include "standard-headers/linux/const.h"
we need to provide a const.h in that location so that the #include
pulls in the file correctly.