* [meta-yocto][PATCH] poky-tiny: Use musl for default system C library
@ 2015-12-20 0:05 Khem Raj
2016-01-08 9:09 ` Burton, Ross
0 siblings, 1 reply; 5+ messages in thread
From: Khem Raj @ 2015-12-20 0:05 UTC (permalink / raw)
To: yocto
poky-tiny is reference for smallest footprint distro that can be
generated using yocto project infrastructure. Therefore switch to using
musl which gives the smallest footprint with a lot of extra stretching
for adding new package if needed, core-image-minimal for qemux86 comes
out to be 716K ( rootfs only ), boot tested on qemux86/poky-tiny
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
meta-yocto/conf/distro/poky-tiny.conf | 25 +++++--------------------
1 file changed, 5 insertions(+), 20 deletions(-)
diff --git a/meta-yocto/conf/distro/poky-tiny.conf b/meta-yocto/conf/distro/poky-tiny.conf
index b0227de..de3a441 100644
--- a/meta-yocto/conf/distro/poky-tiny.conf
+++ b/meta-yocto/conf/distro/poky-tiny.conf
@@ -25,12 +25,12 @@
# [ ] Define linux-yocto-tiny configs for all supported BSPs
# [ ] Drop ldconfig from the installation
# [ ] Modify the runqemu scripts to work with ext2 parameter:
-# runqemu qemux86 qemuparams="-nographic" bootparams="console=ttyS0,115200 root=0800"
+# runqemu qemux86 qemuparams="-nographic" bootparams="console=ttyS0,115200 root=0800"
# [ ] Modify busybox to allow for DISTRO_FEATURES-like confiruration
require conf/distro/poky.conf
DISTRO = "poky-tiny"
-
+TCLIBC = "musl"
# FIXME: consider adding a new "tiny" feature
#DISTRO_FEATURES_append = " tiny"
@@ -57,27 +57,11 @@ ENABLE_WIDEC_class-native = "true"
# eglibc->bash->gettext->libc-posix-clang-wchar dependency.
USE_NLS="no"
-# Reconfigure eglibc for a smaller installation
-# Comment out any of the lines below to disable them in the build
-DISTRO_FEATURES_LIBC_TINY = "libc-libm libc-crypt"
-DISTRO_FEATURES_LIBC_TINY_append_x86-64 = " libc-libm-big"
-
-# Required for "who"
-DISTRO_FEATURES_LIBC_MINIMAL = "libc-utmp libc-utmpx libc-getlogin"
-DISTRO_FEATURES_LIBC_REGEX = "libc-posix-regexp"
-DISTRO_FEATURES_LIBC_NET = "libc-inet libc-nis"
-
-DISTRO_FEATURES_LIBC = "${DISTRO_FEATURES_LIBC_TINY} \
- ${DISTRO_FEATURES_LIBC_MINIMAL} \
- ${DISTRO_FEATURES_LIBC_REGEX} \
- ${DISTRO_FEATURES_LIBC_NET} \
- "
-
# Comment out any of the lines below to disable them in the build
# DISTRO_FEATURES options:
# alsa bluetooth ext2 irda pcmcia usbgadget usbhost wifi nfs zeroconf pci
DISTRO_FEATURES_TINY = "pci"
-DISTRO_FEATURES_NET = "ipv4"
+DISTRO_FEATURES_NET = "ipv4 ipv6"
DISTRO_FEATURES_USB = "usbhost"
#DISTRO_FEATURES_USBGADGET = "usbgadget"
#DISTRO_FEATURES_WIFI = "wifi"
@@ -87,13 +71,14 @@ DISTRO_FEATURES = "${DISTRO_FEATURES_TINY} \
${DISTRO_FEATURES_USB} \
${DISTRO_FEATURES_USBGADGET} \
${DISTRO_FEATURES_WIFI} \
- ${DISTRO_FEATURES_LIBC} \
"
# Enable LFS - see bug YOCTO #5865
DISTRO_FEATURES_append_libc-uclibc = " largefile"
+DISTRO_FEATURES_append_libc-musl = " largefile"
DISTRO_FEATURES_class-native = "${DISTRO_FEATURES_DEFAULT} ${DISTRO_FEATURES_LIBC} ${POKY_DEFAULT_DISTRO_FEATURES}"
+DISTRO_FEATURES_class-nativesdk = "${DISTRO_FEATURES_DEFAULT} ${DISTRO_FEATURES_LIBC} ${POKY_DEFAULT_DISTRO_FEATURES}"
# Use tmpdevfs and the busybox runtime services
VIRTUAL-RUNTIME_dev_manager = ""
--
2.6.4
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [meta-yocto][PATCH] poky-tiny: Use musl for default system C library
2015-12-20 0:05 [meta-yocto][PATCH] poky-tiny: Use musl for default system C library Khem Raj
@ 2016-01-08 9:09 ` Burton, Ross
2016-01-08 9:21 ` Burton, Ross
0 siblings, 1 reply; 5+ messages in thread
From: Burton, Ross @ 2016-01-08 9:09 UTC (permalink / raw)
To: Khem Raj; +Cc: yocto
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On 20 December 2015 at 00:05, Khem Raj <raj.khem@gmail.com> wrote:
> poky-tiny is reference for smallest footprint distro that can be
> generated using yocto project infrastructure. Therefore switch to using
> musl which gives the smallest footprint with a lot of extra stretching
> for adding new package if needed, core-image-minimal for qemux86 comes
> out to be 716K ( rootfs only ), boot tested on qemux86/poky-tiny
>
For anyone else reading, I just gave this a test locally, and for context
the previous poky-tiny was using a tuned glibc and the rootfs came in at
1.5M.
Ross
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [meta-yocto][PATCH] poky-tiny: Use musl for default system C library
2016-01-08 9:09 ` Burton, Ross
@ 2016-01-08 9:21 ` Burton, Ross
2016-01-18 7:04 ` Khem Raj
0 siblings, 1 reply; 5+ messages in thread
From: Burton, Ross @ 2016-01-08 9:21 UTC (permalink / raw)
To: Khem Raj; +Cc: yocto
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On 8 January 2016 at 09:09, Burton, Ross <ross.burton@intel.com> wrote:
> For anyone else reading, I just gave this a test locally, and for context
> the previous poky-tiny was using a tuned glibc and the rootfs came in at
> 1.5M.
>
Finished my comparison builds:
musl:
-rw-r--r-- 1 ross ross 731681 Jan 7 23:46
core-image-minimal-qemux86-20160107234351.rootfs.cpio.gz
glibc:
-rw-r--r-- 1 ross ross 1569610 Jan 8 00:01
core-image-minimal-qemux86-20160107235147.rootfs.cpio.gz
uclibc:
-rw-r--r-- 1 ross ross 669759 Jan 8 09:14
core-image-minimal-qemux86-20160108090512.rootfs.cpio.gz
So it's a slightly increase over uclibc, but by default poky-tiny uses
glibc so this is a massive win. In the greater scheme of things musl is
trending to be worth the increase over uclibc too.
Ross
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [meta-yocto][PATCH] poky-tiny: Use musl for default system C library
2016-01-08 9:21 ` Burton, Ross
@ 2016-01-18 7:04 ` Khem Raj
2016-01-22 21:45 ` Khem Raj
0 siblings, 1 reply; 5+ messages in thread
From: Khem Raj @ 2016-01-18 7:04 UTC (permalink / raw)
To: Burton, Ross; +Cc: yocto
[-- Attachment #1.1: Type: text/plain, Size: 1282 bytes --]
> On Jan 8, 2016, at 1:21 AM, Burton, Ross <ross.burton@intel.com> wrote:
>
>
> On 8 January 2016 at 09:09, Burton, Ross <ross.burton@intel.com <mailto:ross.burton@intel.com>> wrote:
> For anyone else reading, I just gave this a test locally, and for context the previous poky-tiny was using a tuned glibc and the rootfs came in at 1.5M.
>
> Finished my comparison builds:
>
> musl:
> -rw-r--r-- 1 ross ross 731681 Jan 7 23:46 core-image-minimal-qemux86-20160107234351.rootfs.cpio.gz
> glibc:
> -rw-r--r-- 1 ross ross 1569610 Jan 8 00:01 core-image-minimal-qemux86-20160107235147.rootfs.cpio.gz
> uclibc:
> -rw-r--r-- 1 ross ross 669759 Jan 8 09:14 core-image-minimal-qemux86-20160108090512.rootfs.cpio.gz
>
> So it's a slightly increase over uclibc, but by default poky-tiny uses glibc so this is a massive win. In the greater scheme of things musl is trending to be worth the increase over uclibc too.
>
Thanks Ross for this info. I think it will be interesting to know the sizes of packages contributing to image from buildhistory if you have it lying around.
musl has libpthread/libm etc. all bundled into single .so for simplicity reasons. I would like to get to bottom of the slight increase of musl over uclibc based system
> Ross
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^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [meta-yocto][PATCH] poky-tiny: Use musl for default system C library
2016-01-18 7:04 ` Khem Raj
@ 2016-01-22 21:45 ` Khem Raj
0 siblings, 0 replies; 5+ messages in thread
From: Khem Raj @ 2016-01-22 21:45 UTC (permalink / raw)
To: Burton, Ross; +Cc: yocto
[-- Attachment #1.1: Type: text/plain, Size: 2127 bytes --]
> On Jan 17, 2016, at 11:04 PM, Khem Raj <raj.khem@gmail.com> wrote:
>
>>
>> On Jan 8, 2016, at 1:21 AM, Burton, Ross <ross.burton@intel.com <mailto:ross.burton@intel.com>> wrote:
>>
>>
>> On 8 January 2016 at 09:09, Burton, Ross <ross.burton@intel.com <mailto:ross.burton@intel.com>> wrote:
>> For anyone else reading, I just gave this a test locally, and for context the previous poky-tiny was using a tuned glibc and the rootfs came in at 1.5M.
>>
>> Finished my comparison builds:
>>
>> musl:
>> -rw-r--r-- 1 ross ross 731681 Jan 7 23:46 core-image-minimal-qemux86-20160107234351.rootfs.cpio.gz
>> glibc:
>> -rw-r--r-- 1 ross ross 1569610 Jan 8 00:01 core-image-minimal-qemux86-20160107235147.rootfs.cpio.gz
>> uclibc:
>> -rw-r--r-- 1 ross ross 669759 Jan 8 09:14 core-image-minimal-qemux86-20160108090512.rootfs.cpio.gz
>>
>> So it's a slightly increase over uclibc, but by default poky-tiny uses glibc so this is a massive win. In the greater scheme of things musl is trending to be worth the increase over uclibc too.
>>
>
> Thanks Ross for this info. I think it will be interesting to know the sizes of packages contributing to image from buildhistory if you have it lying around.
> musl has libpthread/libm etc. all bundled into single .so for simplicity reasons. I would like to get to bottom of the slight increase of musl over uclibc based system
>
musl/core-image-minimal ( 690K )
601 KiB busybox
598 KiB musl
23 KiB netbase
5 KiB update-rc.d
4 KiB update-alternatives-opkg
3 KiB busybox-udhcpc
3 KiB busybox-mdev
3 KiB base-files
2 KiB run-postinsts
2 KiB busybox-syslog
uclibc/core-image-minimal ( 614K)
603 KiB busybox
515 KiB uclibc
73 KiB libm1
23 KiB netbase
5 KiB update-rc.d
4 KiB update-alternatives-opkg
3 KiB busybox-udhcpc
3 KiB busybox-mdev
3 KiB base-files
2 KiB run-postinsts
2 KiB busybox-syslog
I don’t know why musl one is 690K where as the factored sizes are quite same for both images . May be because it is on different machine.
>
>
>> Ross
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2015-12-20 0:05 [meta-yocto][PATCH] poky-tiny: Use musl for default system C library Khem Raj
2016-01-08 9:09 ` Burton, Ross
2016-01-08 9:21 ` Burton, Ross
2016-01-18 7:04 ` Khem Raj
2016-01-22 21:45 ` Khem Raj
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