Documentation/kbuild/reproducible-builds.rst

17 ----------
42 ----------
50 ------------------
52 When the kernel is built out-of-tree, debug information may include
54 including the ``-fdebug-prefix-map`` option in the `KCFLAGS`_ variable.
57 to an absolute filename in an out-of-tree build.  Kbuild automatically
58 uses the ``-fmacro-prefix-map`` option to prevent this, if it is
62 `prefix-map options`_.
65 ----------------------------------
67 The build processes for some programs under the ``tools/``
68 subdirectory do not completely support out-of-tree builds.  This may
69 cause a later source package build using e.g. ``make rpm-pkg`` to
71 pristine by running ``make mrproper`` or ``git clean -d -f -x`` before
75 --------------
100 -----------------------
102 If you enable ``CONFIG_RANDSTRUCT``, you will need to pre-generate
104 value is used by each build. See ``scripts/gen-randstruct-seed.sh``
108 --------------------
123 ---
132 .. _KBUILD_BUILD_TIMESTAMP: kbuild.html#kbuild-build-timestamp
133 .. _KBUILD_BUILD_USER and KBUILD_BUILD_HOST: kbuild.html#kbuild-build-user-kbuild-build-host
135 .. _prefix-map options: https://reproducible-builds.org/docs/build-path/
136 .. _Reproducible Builds project: https://reproducible-builds.org/
137 .. _SOURCE_DATE_EPOCH: https://reproducible-builds.org/docs/source-date-epoch/