OpenWRT (Buildroot & FPU)

[ryzhov_al]

lly, theMIROn, íåñìîòðÿ íà òî, ÷òî âàø òóë÷åéí ñêîíôèãóðèðîâàí ñ UCLIBC_HAS_FLOATS=y, ó ìåíÿ ñ íèì íå ñîáèðàåòñÿ zlib.so ïðè èñïîëüçîâàíèè CFLAGS="... -msoft-float":

(cd /media/openwrt/trunk/build_dir/target-mipsel-unknown-linux-gnu/zlib-1.2.5; AR=mipsel-uclibc-ar AS="mipsel-uclibc-gcc -c -Os -pipe -mips32 -mtune=mips32 -fno-caller-saves -fhonour-copts -msoft-float" LD=mipsel-uclibc-ld NM=mipsel-uclibc-nm CC="mipsel-uclibc-gcc" GCC="mipsel-uclibc-gcc" CXX="mipsel-uclibc-g++" RANLIB=mipsel-uclibc-ranlib STRIP=mipsel-uclibc-strip OBJCOPY=mipsel-uclibc-objcopy OBJDUMP=mipsel-uclibc-objdump SIZE=mipsel-uclibc-size LDSHARED="mipsel-uclibc-gcc -shared -Wl,-soname,libz.so.1" CFLAGS="-Os -pipe -mips32 -mtune=mips32 -fno-caller-saves -fhonour-copts -msoft-float -fpic -fhonour-copts" ./configure --prefix=/usr --shared --uname=Linux );
Checking for shared library support...
Tested mipsel-uclibc-gcc -w -c -Os -pipe -mips32 -mtune=mips32 -fno-caller-saves -fhonour-copts -msoft-float -fpic -fhonour-copts -fPIC ztest17214.c
Tested mipsel-uclibc-gcc -shared -Wl,-soname,libz.so.1 -Os -pipe -mips32 -mtune=mips32 -fno-caller-saves -fhonour-copts -msoft-float -fpic -fhonour-copts -fPIC -o ztest17214.so ztest17214.o
/opt/brcm/hndtools-mipsel-uclibc/bin/mipsel-linux-uclibc-ld: Warning: ztest17214.so uses hard float, ztest17214.o uses soft float
No shared library support; try without defining CC and CFLAGS

Ïî÷åìó? Ó íàñ â òóë÷åéíå âñ¸ æå èñïîëüçóåòñÿ hard float è ìíå íåîáõîäèìî ïîäêðóòèòü OpenWRT Buildroot äëÿ òîãî, ÷òîáû èñêëþ÷èòü êëþ÷ -msoft-float èç CFLAGS?

[lly]

lly, theMIROn, íåñìîòðÿ íà òî, ÷òî âàø òóë÷åéí ñêîíôèãóðèðîâàí ñ UCLIBC_HAS_FLOATS=y, ó ìåíÿ ñ íèì íå ñîáèðàåòñÿ zlib.so ïðè èñïîëüçîâàíèè CFLAGS="... -msoft-float":

À îòêóäà òû âûòàùèë "-msoft-float"? ß åãî íå âèæó â zlib/Makefile, çíà÷èò â .config SOFT_FLOAT=y ?
"-msoft-float" èìååò ñìûñë òîëüêî â ñëó÷àå îòñóòñòâèÿ FPU, FPU-ýìóëÿòîðà â ÿäðå è íàëè÷èÿ õîðîøåé ìàòåìàòè÷åñêîé áèáëèîòåêè. À ó íàñ ýìóëÿòîð â ÿäðå.

[ryzhov_al]

À îòêóäà òû âûòàùèë "-msoft-float"?

OpenWRT buildroot ïîäàðèë, â äåôîëòíîé êîíôèãóðàöèè. Íàïîìíþ, ÷òî ÿ ïåðåñîáèðàþ èì ïàêåòû.
ÎÊ, ÿ óáåðó soft float. Ïîñìîòðè, ïîæàëóéñòà, íà äðóãèå êëþ÷è â ñîñòàâå CFLAGS ïîñòîì âûøå. Âñ¸ ëè â ïîðÿäêå?

[lly]

OpenWRT buildroot ïîäàðèë, â äåôîëòíîé êîíôèãóðàöèè.

Ïðèä¸òñÿ ïîäíàñòðîèòü...

Ïîñìîòðè, ïîæàëóéñòà, íà äðóãèå êëþ÷è â ñîñòàâå CFLAGS ïîñòîì âûøå. Âñ¸ ëè â ïîðÿäêå?

1. çà÷åì-òî äâà ðàçà ïðîáèëîñü -fhonour-copts, íî ýòî êîñìåòèêà
2. ÿ áû î÷åíü âíèìàòåëüíî ïîñìîòðåë çà÷åì äîáàâèëè -fno-caller-saves , îáû÷íî ýòà îïöèÿ íå íóæíà. Cïåöèôè÷íî äëÿ zlib?

[ryzhov_al]

Ïðèä¸òñÿ ïîäíàñòðîèòü...

1. çà÷åì-òî äâà ðàçà ïðîáèëîñü -fhonour-copts, íî ýòî êîñìåòèêà

Ìîé êîñÿê.

1. ÿ áû î÷åíü âíèìàòåëüíî ïîñìîòðåë çà÷åì äîáàâèëè -fno-caller-saves , îáû÷íî ýòà îïöèÿ íå íóæíà. Cïåöèôè÷íî äëÿ zlib?

Íåò. Òîæå OpenWRT Buildroot ïîäàðèë, â CONFIG_TARGET_OPTIMIZATION. Óáðàë.

[ryzhov_al]

À îòêóäà òû âûòàùèë "-msoft-float"? ß åãî íå âèæó â zlib/Makefile, çíà÷èò â .config SOFT_FLOAT=y ?
"-msoft-float" èìååò ñìûñë òîëüêî â ñëó÷àå îòñóòñòâèÿ FPU, FPU-ýìóëÿòîðà â ÿäðå è íàëè÷èÿ õîðîøåé ìàòåìàòè÷åñêîé áèáëèîòåêè. À ó íàñ ýìóëÿòîð â ÿäðå.

Ñòðàííî êàê-òî.  ìî¸ì TP-Link TL-MR3020 ïîëíîöåííûé FPU åñòü, íî ïðè ñáîðêè ñîôòà OpenWRT'øíèêè âñ¸ ðàâíî èñïîëüçóþò soft float. Ïî÷åìó?

• kernel 3.3.8,
• gcc 4.6.3,
• uClibc 0.9.33.2.

Èëè òóë÷åéí ñàì ïåðåíàïðàâëÿåò float point îïåðàöèè â FPU áëîê?  ñîñòàâå òóë÷åéíà libm åñòü, â ñîñòàâå /lib/* íà óñòðîéñòâå òîæå.

[lly]

Ñòðàííî êàê-òî.  ìî¸ì TP-Link TL-MR3020 ïîëíîöåííûé FPU åñòü, íî ïðè ñáîðêè ñîôòà OpenWRT'øíèêè âñ¸ ðàâíî èñïîëüçóþò soft float. Ïî÷åìó?

À ñ ÷åãî òû âçÿë ÷òî òàì æåëåçíûé FPU? ß ñïåêè ïîëåíèëñÿ èñêàòü, åñòü ëèíê?
Îíè âèäèìî ñ÷èòàþò ÷òî soft-float áûñòðåå ÷åì FPU-ýìóëÿòîð â ÿäðå.

[ryzhov_al]

À ñ ÷åãî òû âçÿë ÷òî òàì æåëåçíûé FPU? ß ñïåêè ïîëåíèëñÿ èñêàòü, åñòü ëèíê?

Íåò, ñïåêè íà AR9331 íå íàø¸ë, òîëüêî Wiki ïî ðîóòåðó.
Ñ ÷åãî âçÿë? Òîëüêî ïî êîñâåííûì ïðèçíàêàì:

• íåò óïîìèíàíèé î Algorithmics/MIPS FPU Emulator â dmesg,
• øóñòðî ïðîõîäèò FPU-test, íàðàâíå ñ Raspberry Pi, ãäå FPU, íàñêîëüêî çíàþ, åñòü,

Íî â êîíôèãå ÿäðà CONFIG_MIPS_FPU_EMU=y. Ïðîòèâîðå÷èâî êàê-òî.
Âîò áóòëîã è ñîäåðæèìîå /proc/cpuinfo.

Èíòåðåñíàÿ æåëåçêà, à êàê ó íåãî ðàáîòàþò 3G ìîäåìû ñ ðîäíîé ïðîøèâîé? ß èãðàëñÿ ñ WL-330N3G, òàì rt3070 è õîðîøèé ìåøî÷åê

Íåò, çàâîäñêóþ ïðîøèâêó ñí¸ñ ïåðâûì äåëîì ïîñëå ñîõðàíåíèÿ îðèãèíàëüíîãî îáðàçà ôëåøà. Îðèãèíàëüíàÿ ïðîøèâêà ïðè èñïîëüçîâàíèè ðîóòåðà äëÿ ñâîèõ íóæä ìàëîïðèãîäíà.
À æåëåçÿêà äà, ðóëèò. ß, ñêàæåì, íå îæèäàë, ÷òî îíà áóäåò ÷èòàòü ñ ïîäêëþ÷åííîãî USB-HDD ñî ñêîðîñòüþ 34ÌÁàéò/c.

[LnrMn]

Ñíà÷àëà âçÿë MR3020 (999ð. ìåñÿö íàçàä).. Ïîêîâûðÿë.. Ïîëó÷èëñÿ 3020+. (64MB RAM)
Åñòü æå WR703!  Ðîññèè ,ïî÷åìó-òî, íåò åãî. Çàòî åñòü WR702..
Êóïèë â ÄÍÑ WR702 (790ð. äâå íåäåëè êàê). Îí íà "ìèêðîòèêå".
ÎÇÓ 16ÌÁ, Ôëåø 2ÌÁ. Ñ âèäó (ïî âíóòðåííîñòÿì) .. íó ïîëíûé îòñòîé... Îäíàêî - ïîëíûé àíàëîã 703.
Òðàäèöèîííî - ïåðåïàèâàåì îïåðàòèâêó, ôëåø, äîïàèâàåì USB ðàçúåì..
Ïîëó÷àåì 3020+, ðåàëüíî WR702 +++ (RAM, FLASH, USB).

+ Ìåíüøå ðàçìåðîì è äåøåâëå ~íà 30%.
- Serial - ìàëåíüêèå ïëîùàäêè. Êîìó-òî áóäåò òðóäíî ñäåëàòü êîíñîëü.
æèðíûé ìèíóñ Íóæíû ÎÇÓ è Ôëåø , ïàÿëüíèê è ïðîãðàììàòîð.

Ìíå, îôèãåííî, ïîíðàâèëîñü â îïåíâðîòå ðàáîòà ñ ôëåøêîé!! ÂÀÙÅ ïðîçðà÷íî!
ïîÿñíÿþ - íà jaffs ôëåø âñòà¸ò â "îâåðëåé" è .. ×èòàåì ìàò÷àñòü íà OpenWRT.

À ÷òî íàèáîëåå!!! --- Ñ ïîëïèíêà, íà UBUNTU ÂѨ ÑÎÁÈÐÀÅÒÑß ÁÅÇ ÁÓÁÍÎÂ!!!
Ïðàâèëüíûå, ãëàâíîå, ðàáî÷èå òóë÷åéíû äëÿ ñáîðêè. Íå îòâàëèâàþòñÿ èç çà îòñóòñòâèÿ, êàêîãî-ëèáî, ïàêåòà.
Ïðîñòî äîêà÷èâàåò åãî, òèõî... Àòòèòóäà... ìåíÿ î÷åíü ïîðàäîâàëà!!!

RyzhovAl óãó ýòî ïðàâäà Ðàç óæ ðàçãîâîðèëèñü... Âîò ..êàê-òî.. òàê, IMHO.

[ryzhov_al]

Òðàäèöèîííî - ïåðåïàèâàåì îïåðàòèâêó.

Ïðèÿòíûé ñþðïðèç â òîì, ÷òî èñïîëüçóþòñÿ òå æå ÷èïû, ÷òî è äëÿ àïãðåéäà Wl-500g premium v1.

[AndreyUA]

Ñòðàííî êàê-òî.  ìî¸ì TP-Link TL-MR3020 ïîëíîöåííûé FPU åñòü, íî ïðè ñáîðêè ñîôòà OpenWRT'øíèêè âñ¸ ðàâíî èñïîëüçóþò soft float. Ïî÷åìó?

• kernel 3.3.8,
• gcc 4.6.3,
• uClibc 0.9.33.2.

Èëè òóë÷åéí ñàì ïåðåíàïðàâëÿåò float point îïåðàöèè â FPU áëîê?  ñîñòàâå òóë÷åéíà libm åñòü, â ñîñòàâå /lib/* íà óñòðîéñòâå òîæå.

Èíòåðåñíàÿ æåëåçêà, à êàê ó íåãî ðàáîòàþò 3G ìîäåìû ñ ðîäíîé ïðîøèâîé? ß èãðàëñÿ ñ WL-330N3G, òàì rt3070 è õîðîøèé ìåøî÷åê

[ryzhov_al]

staticroute, Megagloom, îáðàòèòå âíèìàíèå íà î÷åíü óáåäèòåëüíûé FPU Emulator â íîâûõ ÷èïàõ Atheros'à. ×òî â TL-MR3020, ÷òî â WNDR3800, ÷òî â TL-WDR4300.
Ìîæåò ó íèõ ÷èñëîäðîáèëêà FPU àïïàðàòíàÿ?

[staticroute]

staticroute, Megagloom, îáðàòèòå âíèìàíèå íà î÷åíü óáåäèòåëüíûé FPU Emulator â íîâûõ ÷èïàõ Atheros'à. ×òî â TL-MR3020, ÷òî â WNDR3800, ÷òî â TL-WDR4300.
Ìîæåò ó íèõ ÷èñëîäðîáèëêà FPU àïïàðàòíàÿ?

èíòåðåñíî, ïîêà ÷òî-òî íè÷åãî íå íàãóãëèë

[ryzhov_al]

Äà, äà, ÿ âñ¸ åù¸ íîøóñü ñ chroot è èùó êóäà åãî ïðèñóíóòü

Äëÿ òîãî, ÷òîáû âîñïîëüçîâàòüñÿ âàíèëüíûì ðåïîçèòîðèåì OpenWRT íà òåêóùåé ïðîøèâêå íåîáõîäèìî:

1. Ïîäãîòîâèòü îáðàç êîðíåâîé ôàéëîâîé ñèñòåìû OpenWRT

Ïðîùå âñåãî ñ ïîìîùüþ Image Builder'à íà PC:

wget http://downloads.openwrt.org/attitude_adjustment/12.09/brcm47xx/generic/OpenWrt-ImageBuilder-brcm47xx-for-linux-i486.tar.bz2
tar -xf ./OpenWrt-ImageBuilder-brcm47xx-for-linux-i486.tar.bz2
cd ./OpenWrt-ImageBuilder-brcm47xx-for-linux-i486/
make image
cd ./build_dir/target-mipsel_uClibc-0.9.33.2/
tar -cvzf ./root-brcm47xx.tgz ./root-brcm47xx/

è ïåðåïðàâèòü åãî íà íîñèòåëü, ïîäêëþ÷åííûé ê ðîóòåðó. Íå âàæíî ñòîèò ëè íà ðîóòåðå Optware/Entware, ëèøü áû áûë äîñòóïåí àïëåò chroot. Åñëè åãî â ñîñòàâå âàøåé ïðîøèâêè íåò, âîñïîëüçóéòåñü ìîèì ñòàòè÷åñêèì áèíàðíèêîì.

2. Ïîäãîòîâèòü îáðàç íà ðîóòåðå

cd <folder>
tar -xvzf ./root-brcm47xx.tgz
mount -o bind /dev <folder>/root-brcm47xx/dev
mount -o bind /proc <folder>/root-brcm47xx/proc
mount -o bind /sys <folder>/root-brcm47xx/sys

3. Âñ¸!

Ïîðà íûðÿòü â OpenWRT:

chroot ./root-brcm47xx
mkdir /var/lock
opkg update
opkg install <you name it>
/etc/init.d/<you name it> start

Áóäåò ðàáîòàòü ïîäàâëÿþùåå áîëüøèíñòâî ïàêåòîâ. Òîëüêî ïðèãîòîâüòåñü ê ðåäêèì ãëþêàì, ñâÿçàííûìè ñ îòñóòñòâóþùèìè â íàøåì ÿäðå syscall'àìè: ïðîøèâêà OpenWRT îñíîâàíà íà áîëåå ñîâðåìåííîì ÿäðå.

MercuryV, òû ïëàíèðîâàë ïîðòèðîâàòü Entware íà Iomega iConnect? Ïîæàëóéñòà! Òîëüêî âûáåðè target kirkwood.
ß ïëàíèðîâàë èñïîëüçîâàòü Entware íà ñâî¸ì WD My Book Live. Ïîæàëóéñòà! Òîëüêî ìíå ïðèä¸òñÿ âûáðàòü target ppc40x.

Çàñàäà òåîðåòè÷åñêè ìîæåò âîçíèêíóòü òîëüêî â îòñóòñòâèè chroot íà íóæíîé ïëàòôîðìå.

[ryzhov_al]

Âîîáùå, Entware ïîäõîäèò ê èíòåðåñíîìó ðóáåæó (MercuryV, ÿ òåáå óæå ïðîãîâàðèâàë ýòî): íàì ñêîðî áóäåò áîëüøå íå÷åãî âçÿòü îò OpenWRT. Òîï NN ïàêåòîâ ó íèõ â áîëåå-ìåíåå àêòóàëüíîì ñîñòîÿíèè, îñòàëüíûå — â äîâîëüíî çàìøåëîì, òðåáóþùèì îáíîâëåíèÿ. Ìîæíî, êîíå÷íî, óéòè â îòðûâ îò OpenWRT, ïîääåðæèâàÿ ó ñåáÿ èäèëëèþ, íî ó íàñ íà ýòî ïðîñòî íå õâàòèò ÷åëîâå÷åñêèõ ðåñóðñîâ. Íàì äî ñèõ ïîð âñ¸ óñïåøíî óäà¸òñÿ ðàçðóëèâàòü ïî òîé ïðè÷èíå, ÷òî ìû íå ââÿçûâàåìñÿ â êðóïíûå àâàíòþðû, íàïðèìåð, íå ïûòàåìñÿ ïîääåðæèâàòü íåñêîëüêî target'îâ, òîëüêî MIPSEL.

Ó íàñ çà ýòî âðåìÿ ðîäèëñÿ ñâîé ñîáñòâåííûé ôèä ñ äîâîëüíî óíèêàëüíûìè íàðàáîòêàìè. ×òî äàëüøå? Ìîæíî âëèòüñÿ ñî ñâîèìè íàðàáîòêàìè â OpenWRT êîìüþíèòè è èñïîëüçîâàòü ñâîè íàðàáîòêè òîëüêî ÷òî ïîêàçàííûì ñïîñîáîì ó íàñ çäåñü. Ýòî ïðîñòî îäèí èç ìíîãèõ âàðèàíòîâ.

ß î÷åíü ðàä, ÷òî ìíå óäàëîñü ïðèâëå÷ü â ðÿäû ðàçðàáîò÷èêîâ Entware òàêèõ òîëêîâûõ êîëëåã. Íàì, êîëëåãè íàäî îïðåäåëÿòüñÿ: êóäà áóäåì äâèãàòüñÿ äàëüøå? Ïðèãëàøàþ ê äèñêóññèè.

ÇÛ Âàðèàíò âëèâàíèÿ â OpenWRT îäèí èç ñàìûõ ñòð¸ìíûõ: âî-ïåðâûõ, òàì ìû ñåáå áîëüøå íå õîçÿåâà, âî-âòîðûõ, ïîëîâèíó íàøèõ íàðàáîòîê ïðîñòî íå ïðèìóò, â-òðåòüèõ, OpenWRT — ýòî âå÷íàÿ áåòà â äåñÿòè ñêîìïèëèðîâàííûõ âàðèàíòàõ, íåñîâìåñòèìûõ äðóã ñ äðóãîì.

Ñêîðåå âñåãî âñ¸ çàêîí÷èòñÿ èçûñêàíèåì «âòîðîãî äûõàíèÿ», ÷òîáû óéòè â îòðûâ îò ïåðâîèñòî÷íèêîâ.