This can reduce almost 3 times the size of the linux-image package,
while keeping the debug symbols available for this particular build, in
their own package.
This mimics the way kernels are built in debian, ubuntu, or with
make-kpkg, and comes at the price of a small slowdown in the building of
packages.
Signed-off-by: Anisse Astier <ani...@astier.eu>
---
scripts/package/builddeb | 43 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 42 insertions(+), 1 deletion(-)
diff --git a/scripts/package/builddeb b/scripts/package/builddeb
index 2d84671..797484b 100644
--- a/scripts/package/builddeb
+++ b/scripts/package/builddeb
@@ -78,17 +78,21 @@ tmpdir="$objtree/debian/tmp"
fwdir="$objtree/debian/fwtmp"
kernel_headers_dir="$objtree/debian/hdrtmp"
libc_headers_dir="$objtree/debian/headertmp"
+dbg_dir="$objtree/debian/dbgtmp"
packagename=linux-image-$version
fwpackagename=linux-firmware-image
kernel_headers_packagename=linux-headers-$version
libc_headers_packagename=linux-libc-dev
+dbg_packagename=$packagename-dbg
if [ "$ARCH" = "um" ] ; then
packagename=user-mode-linux-$version
fi
+BUILD_DEBUG="$(grep -s '^CONFIG_DEBUG_INFO=y' $objtree/$KCONFIG_CONFIG ||
true)"
+
# Setup the directory structure
-rm -rf "$tmpdir" "$fwdir" "$kernel_headers_dir" "$libc_headers_dir"
+rm -rf "$tmpdir" "$fwdir" "$kernel_headers_dir" "$libc_headers_dir" "$dbg_dir"
mkdir -m 755 -p "$tmpdir/DEBIAN"
mkdir -p "$tmpdir/lib" "$tmpdir/boot" "$tmpdir/usr/share/doc/$packagename"
mkdir -m 755 -p "$fwdir/DEBIAN"
@@ -101,6 +105,10 @@ mkdir -p "$kernel_headers_dir/lib/modules/$version/"
if [ "$ARCH" = "um" ] ; then
mkdir -p "$tmpdir/usr/lib/uml/modules/$version" "$tmpdir/usr/bin"
fi
+if [ -n "$BUILD_DEBUG" ] ; then
+ mkdir -p "$dbg_dir/usr/share/doc/$dbg_packagename"
+ mkdir -m 755 -p "$dbg_dir/DEBIAN"
+fi
# Build and install the kernel
if [ "$ARCH" = "um" ] ; then
@@ -128,6 +136,20 @@ if grep -q '^CONFIG_MODULES=y' $objtree/$KCONFIG_CONFIG ;
then
mv "$tmpdir/lib/modules/$version"/*
"$tmpdir/usr/lib/uml/modules/$version/"
rmdir "$tmpdir/lib/modules/$version"
fi
+ if [ -n "$BUILD_DEBUG" ] ; then
+ (
+ cd $tmpdir
+ for module in $(find lib/modules/ -name *.ko); do
+ mkdir -p $(dirname
$dbg_dir/usr/lib/debug/$module)
+ # only keep debug symbols in the debug file
+ objcopy --only-keep-debug $module
$dbg_dir/usr/lib/debug/$module
+ # strip original module from debug symbols
+ objcopy --strip-debug $module
+ # then add a link to those
+ objcopy
--add-gnu-debuglink=$dbg_dir/usr/lib/debug/$module $module
+ done
+ )
+ fi
fi
if [ "$ARCH" != "um" ]; then
@@ -299,4 +321,23 @@ fi
create_package "$packagename" "$tmpdir"
+if [ -n "$BUILD_DEBUG" ] ; then
+ # Build debug package
+ mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/
+ cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/
+
+ cat <<EOF >> debian/control
+
+Package: $dbg_packagename
+Section: debug
+Provides: linux-debug, linux-debug-$version
+Architecture: any
+Description: Linux kernel debugging symbols for $version
+ This package will come in handy if you need to debug the kernel. It provides
+ all the necessary debug symbols for the kernel and its modules.
+EOF
+
+ create_package "$dbg_packagename" "$dbg_dir"
+fi
+
exit 0
--
1.8.3.rc1
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