The upstream Makefile uses DEBUG to control both stripping of debug
information *and* disabling optimisations.
We want to disable stripping of debug information so that (normally)
dh_strip can move it into a separate package later. However we also
want to enable optimisations by default.
Therefore:
- Set the STRIP variable (a command prefix) to "true"
- Set the DEBUG variable (a pseudo-boolean) to "true" if and only if
the "noopt" build option is used
These two are terse by default and don't respect the KBUILD_VERBOSE
environment variable.
(I considered adding V=1 to the MAKEFLAGS we use by default in
debian/rules.real, but this might have different semantics for the few
tools that aren't built using either kbuild or automake.)
This adds support for PREEMPT_RT by adding two new featureset: none and
rt. For now the rt featureset supports armmp only, support for lpae
might be added later. the none featureset supports both flavours armmp
and armmp-lpae.
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Merge tag 'debian/4.17.6-2'
Release linux (4.17.6-2).
- Drop the ABI maintenance patch
- Resolve conflict between changes to config file generation in sid
(delete CONFIG_BUILD_SALT) and master (putting them in
arch-dependent packages)
Closes: #872263
- kbuild: Add build salt to the kernel and modules
- [arm64,powerpc,x86] Add build salt to the vDSO
- Set BUILD_SALT equal to the release string
The previous fix ensured that objtool was built for the right host
architecture, but it was still including some UAPI header files
(in particular <asm/bitsperlong.h>) for the build architecture.
Currently we replicate the mapping of Debian architectures to kernel
source architectures here. Use the KERNEL_ARCH variable that is now
passed down by rules.real. We still need to check whether perf is
supported on the architecture, though.