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| author | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-04-07 19:43:51 +0900 |
|---|---|---|
| committer | Masahiro Yamada <yamada.masahiro@socionext.com> | 2019-04-09 22:51:56 +0900 |
| commit | a788b2ed81abeb949325fd50d7527f45203c1b21 (patch) | |
| tree | f20f94a39e6906f3f26443fc5f3deca417be89ee /samples | |
| parent | 24512795df0901f79a670f8285c450ae912c009d (diff) | |
kbuild: check arch/$(SRCARCH)/include/generated before out-of-tree build
After cross-compiling the kernel, "make mrproper" should be executed
with the proper ARCH= option. Otherwise, stale objects will remain
under arch/$(SRCARCH)/.
One bad scenario is like this:
$ make ARCH=arm defconfig all # cross-compile the kernel for arm
$ make mrproper # mrproper for host-arch (i.e. x86)
$ make ARCH=arm O=build_dir defconfig all
If you miss ARCH= for mrproper and cross-compile the kernel with O=
and ARCH= options, Kbuild will happily start to build, but may fail
due to stale objects in the srctree.
If $(srctree)/arch/$(SRCARCH)/include/generated/ exists, let's stop
the out-of-tree build. To detect this, mrproper should clean only
arch/$(SRCARCH)/include/generated/.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Diffstat (limited to 'samples')
0 files changed, 0 insertions, 0 deletions