Strip kernel & modules

Rebased and tweaked to apply since the original patch was ~7 years old.

Signed-off-by: Robin H. Johnson <robbat2@gentoo.org>

5 files changed, 36 insertions, 0 deletions

diff --git a/doc/genkernel.8.txt b/doc/genkernel.8.txt
index a2d3c222..ca8eff06 100644
--- a/doc/genkernel.8.txt
+++ b/doc/genkernel.8.txt
@@ -384,6 +384,13 @@ OUTPUT SETTINGS
     Directory structure to include in the initramfs, only available
     on >=2.6 kernels
 
+*--strip*=<all|kernel|modules|none>::
+    Strip debug symbols from the installed kernel, modules, all
+    (default) or none.
+
+*--no-strip*::
+    Alias for *--strip=none*.
+
 *--*[*no-*]*firmware*::
     Enable or disables copying of firmware into initramfs.
 
diff --git a/gen_cmdline.sh b/gen_cmdline.sh
index 0e1e7efd..37d1b5cb 100755
--- a/gen_cmdline.sh
+++ b/gen_cmdline.sh
@@ -174,6 +174,11 @@ longusage() {
   echo "				Compress or do not compress the generated initramfs"
   echo "	--compress-initramfs-type=<arg>"
   echo "				Compression type for initramfs (best, xz, lzma, bzip2, gzip, lzop)"
+  echo "	--strip=(all|kernel|modules|none)"
+  echo "				Strip debug symbols from the installed kernel, modules,"
+  echo "				all (default) or none"
+  echo "	--no-strip"
+  echo "				Don't strip installed kernel or modules (alias for --strip=none)"
   echo
   echo "For a detailed list of supported initramfs options and flags; issue:"
   echo "	man 8 genkernel"
@@ -669,6 +674,14 @@ parse_cmdline() {
 			CMD_NICE=0
 			print_info 2 "CMD_NICE: ${CMD_NICE}"
 			;;
+		--strip=*)
+			CMD_STRIP_TYPE=`parse_opt "$*"`
+			print_info 2 "CMD_STRIP_TYPE: ${CMD_STRIP_TYPE}"
+			;;
+		--no-strip)
+			CMD_STRIP_TYPE=none
+			print_info 2 "CMD_STRIP_TYPE: ${CMD_STRIP_TYPE}"
+			;;
 		all)
 			BUILD_KERNEL=1
 			BUILD_MODULES=1
diff --git a/gen_compile.sh b/gen_compile.sh
index 7cc47339..ef72a23d 100755
--- a/gen_compile.sh
+++ b/gen_compile.sh
@@ -306,6 +306,14 @@ compile_modules() {
 	compile_generic modules kernel
 	export UNAME_MACHINE="${ARCH}"
 	[ "${INSTALL_MOD_PATH}" != '' ] && export INSTALL_MOD_PATH
+	if [ "${CMD_STRIP_TYPE}" == "all" -o "${CMD_STRIP_TYPE}" == "modules" ]
+	then
+		print_info 1 "        >> Installing ${KV} modules (and stripping)"
+		INSTALL_MOD_STRIP=1
+		export INSTALL_MOD_STRIP
+	else
+		print_info 1 "        >> Installing ${KV} modules"
+	fi
 	MAKEOPTS="${MAKEOPTS} -j1" compile_generic "modules_install" kernel
 	print_info 1 "        >> Generating module dependency data..."
 	if [ "${INSTALL_MOD_PATH}" != '' ]
@@ -315,6 +323,7 @@ compile_modules() {
 		depmod -a -e -F "${KERNEL_OUTPUTDIR}"/System.map ${KV}
 	fi
 	unset UNAME_MACHINE
+	unset INSTALL_MOD_STRIP
 }
 
 compile_kernel() {
diff --git a/gen_determineargs.sh b/gen_determineargs.sh
index 313dbd00..5f77c07f 100755
--- a/gen_determineargs.sh
+++ b/gen_determineargs.sh
@@ -142,6 +142,7 @@ determine_real_args() {
 	set_config_with_override BOOL   KEYMAP               CMD_KEYMAP               "yes"
 	set_config_with_override BOOL   DOKEYMAPAUTO         CMD_DOKEYMAPAUTO
 	set_config_with_override STRING BUSYBOX_CONFIG       CMD_BUSYBOX_CONFIG
+	set_config_with_override STRING STRIP_TYPE           CMD_STRIP_TYPE           "all"
 	set_config_with_override BOOL   INSTALL              CMD_INSTALL              "yes"
 	set_config_with_override BOOL   DEBUGCLEANUP         CMD_DEBUGCLEANUP         "yes"
 
diff --git a/gen_funcs.sh b/gen_funcs.sh
index 6234189e..0e22a860 100755
--- a/gen_funcs.sh
+++ b/gen_funcs.sh
@@ -388,6 +388,12 @@ copy_image_with_preserve() {
 	cp "${newSrceImage}" "${BOOTDIR}/${currDestImage}" ||
 	    gen_die "Could not copy the ${symlinkName} image to ${BOOTDIR}!"
 
+	if [ "${CMD_STRIP_TYPE}" = "all" -o "${CMD_STRIP_TYPE}" = "kernel" ]
+	then
+		print_info 5 "  Stripping ${BOOTDIR}/${currDestImage}"
+		strip --strip-debug "${BOOTDIR}/${currDestImage}" >/dev/null 2>&1
+	fi
+
 	if [ "${SYMLINK}" = '1' ]
 	then
 		print_info 5 "  Make new symlink(s) (from ${BOOTDIR}):"