Re: [OpenWrt-Devel] [RFC] mklibs.py integration
Hi all, I reworked and fixed the mklibs.py integration and it actually works now. The reported 4KB space saving in the linker binary that florian reported was just simple stripping, not actual relinking. Here are the results with a slightly-bigger-than-standard configuration on a mips target: libuClibc-0.9.30.1.so - before: 401380, after: 253512 libm-0.9.30.1.so - before: 102128, after: 46900 There is no significant space saving on the other libraries yet. - Felix ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [RFC] mklibs.py integration
On Sat, 1 Aug 2009 05:03:22 -0400 Daniel Dickinson wrote: > > Doesn't mklibs.py remove portions of a library that are unused? > Wouldn't that mean that fewer programs would result in more removal > (due to more unused bits). Or do you strip all libraries and not > just uClibc? > Never mind. I see that you are stripping all libraries. So yes, good idea. I was confused by your specifically mentioning the uClibc loader. Can you give comparative squashfs sizes instead? Also, this may takes signficantly long periods of time for large numbers of packages. Have you tested with more than the base setup? Regards, Daniel -- And that's my crabbing done for the day. Got it out of the way early, now I have the rest of the afternoon to sniff fragrant tea-roses or strangle cute bunnies or something. -- Michael Devore GnuPG Key Fingerprint 86 F5 81 A5 D4 2E 1F 1C http://gnupg.org The C Shore (Daniel Dickinson's Website) http://www.bmts.com/~cshore signature.asc Description: PGP signature ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [RFC] mklibs.py integration
Hi Daniel, Le Saturday 01 August 2009 11:03:22 Daniel Dickinson, vous avez écrit : > On Sat, 25 Jul 2009 12:25:20 +0200 > > Florian Fainelli wrote: > > Hi all, > > > > Please find below a proof-of-concept of the mklibs.py reduction > > integration in OpenWrt. I have not been able to strip the uClibc > > loader more than 4KB out of 28KB (original size) but it might > > significantly better results with more softare installed in the > > rootfs. --- Index: Config.in > > Doesn't mklibs.py remove portions of a library that are unused? It does indeed. > Wouldn't that mean that fewer programs would result in more removal > (due to more unused bits). Or do you strip all libraries and not just > uClibc? I think I did not ask it to strip down all shared libraries, thus it only stripped down the linker. I will try to look at it later in the weekend. -- Best regards, Florian Fainelli Email: flor...@openwrt.org Web: http://openwrt.org IRC: [florian] on irc.freenode.net --- signature.asc Description: This is a digitally signed message part. ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
Re: [OpenWrt-Devel] [RFC] mklibs.py integration
On Sat, 25 Jul 2009 12:25:20 +0200 Florian Fainelli wrote: > Hi all, > > Please find below a proof-of-concept of the mklibs.py reduction > integration in OpenWrt. I have not been able to strip the uClibc > loader more than 4KB out of 28KB (original size) but it might > significantly better results with more softare installed in the > rootfs. --- Index: Config.in Doesn't mklibs.py remove portions of a library that are unused? Wouldn't that mean that fewer programs would result in more removal (due to more unused bits). Or do you strip all libraries and not just uClibc? Regards, Daniel -- And that's my crabbing done for the day. Got it out of the way early, now I have the rest of the afternoon to sniff fragrant tea-roses or strangle cute bunnies or something. -- Michael Devore GnuPG Key Fingerprint 86 F5 81 A5 D4 2E 1F 1C http://gnupg.org The C Shore (Daniel Dickinson's Website) http://www.bmts.com/~cshore signature.asc Description: PGP signature ___ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
[OpenWrt-Devel] [RFC] mklibs.py integration
Hi all,
Please find below a proof-of-concept of the mklibs.py reduction integration in
OpenWrt. I have not been able to strip the uClibc loader more than 4KB out of
28KB (original size) but it might significantly
better results with more softare installed in the rootfs.
---
Index: Config.in
===
--- Config.in (revision 16963)
+++ Config.in (working copy)
@@ -142,6 +142,13 @@
This will install all compiled package binaries into
build_dir/target-*/debug-*/,
useful for cross-debugging via gdb/gdbserver
+config USE_MKLIBS
+ bool "Run mklibs.py on the final root filesystem to strip down even
more libraries"
+ default n
+ help
+ This will run mklibs.py on the root filesystem and recompile
the libraries to remove
+ unused symbols.
+
comment "Kernel build options"
config KERNEL_KALLSYMS
Index: tools/mklibs/Makefile
===
--- tools/mklibs/Makefile (revision 0)
+++ tools/mklibs/Makefile (revision 0)
@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2009 OpenWrt.org
+#
+# This is free software, licensed under the GNU General Public License v2.
+# See /LICENSE for more information.
+#
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=mklibs
+PKG_VERSION:=0.1.26
+
+PKG_SOURCE:=$(PKG_NAME)_$(PKG_VERSION).tar.gz
+PKG_SOURCE_URL:=http://ftp.de.debian.org/debian/pool/main/m/mklibs/
+PKG_MD5SUM:=708f284975f1b567b817d27f7677a95f
+
+include $(INCLUDE_DIR)/host-build.mk
+
+define Host/Install
+ $(INSTALL_BIN) \
+ $(HOST_BUILD_DIR)/src/mklibs.py \
+ $(HOST_BUILD_DIR)/src/mklibs-copy.py \
+ $(HOST_BUILD_DIR)/src/mklibs-readelf/mklibs-readelf \
+ $(STAGING_DIR_HOST)/bin/
+endef
+
+define Host/Clean
+ rm -f $(STAGING_DIR_HOST)/bin/mklibs*
+endef
+
+$(eval $(call HostBuild))
Index: tools/Makefile
===
--- tools/Makefile (revision 16963)
+++ tools/Makefile (working copy)
@@ -11,7 +11,7 @@
# subdirectories to descend into
tools-y :=
tools-$(CONFIG_GCC_VERSION_4_3)$(CONFIG_GCC_VERSION_4_4) += gmp mpfr
-tools-y += m4 autoconf automake bison pkg-config sed
+tools-y += m4 autoconf automake bison pkg-config sed mklibs
tools-y += sstrip ipkg-utils genext2fs squashfs squashfs4 mtd-utils lzma-old
mkimage
tools-y += firmware-utils patch-cmdline quilt yaffs2
Index: include/image.mk
===
--- include/image.mk(revision 16963)
+++ include/image.mk(working copy)
@@ -125,6 +125,20 @@
$(call Image/mkfs/prepare/default)
endef
+ifeq ($(CONFIG_USE_MKLIBS),y)
+ define Image/mklibs
+ # Generate the list of programs
+ - rm $(KDIR)/mklibs-progs
+ find $(TARGET_DIR) -type f -perm +100 -exec \
+ file -r -N -F '' {} + | \
+ awk ' /executable.*dynamically/ { print 1 }' >
$(KDIR)/mklibs-progs
+ ifeq ($(CONFIG_USE_UCLIBC),y)
+ $(STAGING_DIR_HOST)/bin/mklibs.py -D -L $(STAGING_DIR)/lib -L
$(TOOLCHAIN_DIR)/lib --ldlib=$(TOOLCHAIN_DIR)/lib/ld-uClibc.so.0 \
+ --target=$(GNU_TARGET_NAME) -d $(TARGET_DIR) `cat
$(KDIR)/mklibs-progs`
+ endif
+ endef
+endif
+
define BuildImage
download:
prepare:
@@ -137,6 +151,7 @@
ifneq ($(IB),1)
install: compile install-targets FORCE
+ $(call Image/mklibs)
$(call Image/Prepare)
$(call Image/mkfs/prepare)
$(call Image/BuildKernel)
--
Best regards, Florian Fainelli
Email: flor...@openwrt.org
Web: http://openwrt.org
IRC: [florian] on irc.freenode.net
---
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