On Fri, Jun 14, 2013 at 11:46:55AM +0200, Anisse Astier wrote: > 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 <anisse@xxxxxxxxx> > Cc: Ben Hutchings <ben@xxxxxxxxxxxxxxx> Acked-by: maximilian attems <max@xxxxxxx> > --- > scripts/package/builddeb | 50 +++++++++++++++++++++++++++++++++++++++++++++++- > 1 file changed, 49 insertions(+), 1 deletion(-) > > diff --git a/scripts/package/builddeb b/scripts/package/builddeb > index 6f21ad8..7c5703a 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' $KCONFIG_CONFIG || true)" > + > # Setup the directory structure > -rm -rf "$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' $KCONFIG_CONFIG ; then > mv "$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 +321,30 @@ fi > > create_package "$packagename" "$tmpdir" > > +if [ -n "$BUILD_DEBUG" ] ; then > + # Build debug package > + # Different tools want the image in different locations > + # perf > + mkdir -p $dbg_dir/usr/lib/debug/lib/modules/$version/ > + cp vmlinux $dbg_dir/usr/lib/debug/lib/modules/$version/ > + # systemtap > + mkdir -p $dbg_dir/usr/lib/debug/boot/ > + ln -s ../lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/boot/vmlinux-$version > + # kdump-tools > + ln -s lib/modules/$version/vmlinux $dbg_dir/usr/lib/debug/vmlinux-$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 > -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
