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kheaders: optimize header copy for in-tree builds 

This script copies headers by the cpio command twice; first from
srctree, and then from objtree. However, when we building in-tree,
we know the srctree and the objtree are the same. That is, all the
headers copied by the first cpio are overwritten by the second one.

Skip the first cpio when we are building in-tree.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
This commit is contained in:
Masahiro Yamada 2019-10-08 21:05:54 +09:00
parent 0e11773e76
commit ea79e5168b
1 changed files with 9 additions and 7 deletions
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16
kernel/gen_kheaders.sh
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@ -56,14 +56,16 @@ fi
rm -rf $cpio_dir
mkdir $cpio_dir
pushd $srctree > /dev/null
for f in $dir_list;
do find "$f" -name "*.h";
done | cpio --quiet -pd $cpio_dir
popd > /dev/null
if [ "$building_out_of_srctree" ]; then
pushd $srctree > /dev/null
for f in $dir_list
do find "$f" -name "*.h";
done | cpio --quiet -pd $cpio_dir
popd > /dev/null
fi
# The second CPIO can complain if files already exist which can
# happen with out of tree builds. Just silence CPIO for now.
# The second CPIO can complain if files already exist which can happen with out
# of tree builds having stale headers in srctree. Just silence CPIO for now.
for f in $dir_list;
do find "$f" -name "*.h";
done | cpio --quiet -pd $cpio_dir >/dev/null 2>&1