[PATCH] Add option for stripping modules while installing them
- From: "Theodore Ts'o" <tytso@xxxxxxx>
- Date: Wed, 21 Jun 2006 20:53:09 -0400
[ I sent this to kbuild-devel@xxxxxxxxxxxxxxxxxxxxx cc'ed to LKML about
two weeks ago, and never got a comment. Andrew could you include this
in the -mm tree? It's IMHO a useful feature. -- Ted ]
Add option for stripping modules while installing them
This function adds support for stripping modules while they are being
installed. CONFIG_DEBUG_KERNEL (which will probably become more
popular as developers use kdump) causes the size of the installed
modules to grow by a factor of 9 or so.
Some kernel package systems solve this problem by stripping the debug
information from /lib/modules after running "make modules_install",
but that may not work for people who are installing directly into
/lib/modules --- root partitions that were sized to handle 16 megs
worth of modules may not be quite so happy with 145 megs of modules,
so the "make modules_install" never succeeds.
This patch allows such users to request modules_install to strip the
modules as they are installed.
Signed-off-by: "Theodore Ts'o" <tytso@xxxxxxx>
Index: 2.6.17/Makefile
===================================================================
--- 2.6.17.orig/Makefile 2006-06-17 21:49:35.000000000 -0400
+++ 2.6.17/Makefile 2006-06-18 12:15:09.000000000 -0400
@@ -516,6 +516,23 @@
MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE)
export MODLIB
+#
+# INSTALL_MOD_STRIP, if defined, will cause modules to be
+# stripped after they are installed. If INSTALL_MOD_STRIP is '1', then
+# the default option --strip-debug will be used. Otherwise,
+# INSTALL_MOD_STRIP will used as the options to the strip command.
+
+ifdef INSTALL_MOD_STRIP
+ifeq ($(INSTALL_MOD_STRIP),1)
+mod_strip_cmd = strip --strip-debug
+else
+mod_strip_cmd = strip $(INSTALL_MOD_STRIP)
+endif # INSTALL_MOD_STRIP=1
+else
+mod_strip_cmd = true
+endif # INSTALL_MOD_STRIP
+export mod_strip_cmd
+
ifeq ($(KBUILD_EXTMOD),)
core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/
Index: 2.6.17/scripts/Makefile.modinst
===================================================================
--- 2.6.17.orig/scripts/Makefile.modinst 2006-06-17 21:49:35.000000000 -0400
+++ 2.6.17/scripts/Makefile.modinst 2006-06-18 12:15:09.000000000 -0400
@@ -17,7 +17,7 @@
@:
quiet_cmd_modules_install = INSTALL $@
- cmd_modules_install = mkdir -p $(2); cp $@ $(2)
+ cmd_modules_install = mkdir -p $(2); cp $@ $(2) ; $(mod_strip_cmd) $(2)/$(notdir $@)
# Modules built outside the kernel source tree go into extra by default
INSTALL_MOD_DIR ?= extra
Index: 2.6.17/Documentation/kbuild/makefiles.txt
===================================================================
--- 2.6.17.orig/Documentation/kbuild/makefiles.txt 2006-06-17 21:49:35.000000000 -0400
+++ 2.6.17/Documentation/kbuild/makefiles.txt 2006-06-18 12:15:09.000000000 -0400
@@ -1123,6 +1123,14 @@
$(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE). The user may
override this value on the command line if desired.
+ INSTALL_MOD_STRIP
+
+ If this variable is specified, will cause modules to be stripped
+ after they are installed. If INSTALL_MOD_STRIP is '1', then the
+ default option --strip-debug will be used. Otherwise,
+ INSTALL_MOD_STRIP will used as the option(s) to the strip command.
+
+
=== 8 Makefile language
The kernel Makefiles are designed to run with GNU Make. The Makefiles
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