Commit a8c3d89c authored by Ben Hutchings's avatar Ben Hutchings

README.source: Document the various makefiles and use of out-of-tree builds

parent a96bd61a
......@@ -253,3 +253,26 @@ Several build profiles are understood and supported:
with nopython as the build-dependencies will be unsatisfiable otherwise.
- nopython: Disable Python bindings. This currently disables building the
linux-perf-<version> package, as the perf program embeds Python.
Build rules
The Debian build rules are split across multiple makefiles:
- debian/rules: Standard top-level makefile for Debian package build.
- debian/rules.gen: Intermediate makefile between debian/rules and
debian/rules.real. This is generated by based on
the configuration under debian/config.
- debian/rules.real: Makefile for building a single kernel flavour
or other group of binary packages.
- debian/rules.d: Makefiles for building userland code from specific
source directories. The directory structure mirrors the kernel
source directories. debian/rules.real uses the "make-tools" to
invoke these makefiles.
All builds *must* be done out-of-tree in a subdirectory of
debian/build, so that the output files do not end up in the
linux-source-<version> binary package. Currently kernel builds use
debian/build/build_<arch>_<featureset>_<flavour>, userland code uses
debian/build/build-tools/<source-dir> and documentation uses
......@@ -5,6 +5,7 @@ linux (4.19.37-4) UNRELEASED; urgency=medium
- libbpf: Use only 2 components in soversion, matching package name
(Closes: #929187)
- libbpf: Build out-of-tree
* README.source: Document the various makefiles and use of out-of-tree builds
-- Ben Hutchings <> Sun, 19 May 2019 00:04:16 +0100
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