{"id":52800,"date":"2019-11-17T00:00:00","date_gmt":"2019-11-16T21:00:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/blog_prohoster\/dostupna-standartnaya-si-biblioteka-picolibc-1-1"},"modified":"2020-02-18T14:00:36","modified_gmt":"2020-02-18T11:00:36","slug":"dostupna-standartnaya-si-biblioteka-picolibc-1-1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/dostupna-standartnaya-si-biblioteka-picolibc-1-1","title":{"rendered":"Saadaval on standardne C-raamatukogu PicoLibc 1.1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Keith Packard, aktiivne Debian'i arendaja, X.Org projekti juht ja paljude X-laienduste, sealhulgas XRender, XComposite ja XRandR looja, <noindex><a rel=\"nofollow\" href=\"https:\/\/keithp.com\/blogs\/picolibc-1.1\/\">esitles<\/a><\/noindex> uueks standardseks C-raamatukogu v\u00e4ljaanne <noindex><a rel=\"nofollow\" href=\"https:\/\/keithp.com\/picolibc\/\">PicoLibc 1.1<\/a><\/noindex>, mida arendatakse rakendamiseks sisseehitatud seadmetes, millel on piiratud p\u00fcsiv\u00e4li ja juhtm\u00e4lule. Arendamise k\u00e4igus on osa koodist laenatud teegist <noindex><a rel=\"nofollow\" href=\"http:\/\/sourceware.org\/newlib\/\">newlib<\/a><\/noindex> projekti Cygwin'ist ja <noindex><a rel=\"nofollow\" href=\"https:\/\/www.nongnu.org\/avr-libc\/\">AVR Libc<\/a><\/noindex>, mis on arendatud Atmeli AVR mikrokontrolleritele. PicoLibci kood <noindex><a rel=\"nofollow\" href=\"https:\/\/github.com\/keith-packard\/picolibc\">levitatakse<\/a><\/noindex> on BSD litsentsi all. Teegi toimetamine toetab arhitektuure ARM (32-bit), i386, RISC-V, x86_64 ja PowerPC.<\/p>\n<p>Kit Packard alustas arendust\u00f6\u00f6d, kuna ei leidnud sobivat Libc varianti, mida kasutada v\u00e4ikese SDRAM-iga sisseehitatud seadmetes. Projekt on arenenud alates eelmisest aastast. Esialgu oli projekt variant newlib'ist, mille stdio funktsioonid asendati avrlibc kompaktselt variandiga (newlib'i stdio ei rahuldanud suuri ressursikasutuse n\u00f5udeid). Kuna Kiti praegune tegevus on seotud RISC-V arhitektuuriga ja t\u00f6\u00f6riistade arendamisega sisseehitatud seadmete jaoks, on ta hiljuti \u00fcle vaadanud libc rakenduste olukorra ning j\u00e4reldanud, et v\u00e4ikse t\u00e4iendusega newlib'i ja avrlibc kombinatsioon v\u00f5ib olla hea universaalne lahendus. Algne projekt arenes nime all \"newlib-nano\", kuid et v\u00e4ltida segadust Newlib'i teegiga, nimetati see \u00fcmber PicoLibc-ks.<\/p>\n<p>Picolibc praeguses versioonis on juba tehtud t\u00f6\u00f6d, et eemaldada k\u00f5ik BSD-litsentsi alla mitte kuuluva kood, mis ei olnud kasutusel sisseehitatud seadmete kompileerimisel, mis on oluliselt lihtsustanud projekti litsentsi olukorda. Kohalikud vood on t\u00f5lgitud 'struct _reent' mehanismilt TLS-ile (<noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Thread-local_storage\">thread-local storage<\/a><\/noindex>). Compact stdio versioon, mis on laenatud avrlibc koodi, on vaikimisi aktiveeritud (ATmel spetsiifilised assembleri sisendid on kirjutatud \u00fcmber C keeles). Ehituses on kasutatud Meson t\u00f6\u00f6riistu, mis v\u00f5imaldas mitte siduda newlib'i ehitusstsenaariume ning lihtsustada muudatuste \u00fclekandmist newlib'ist. Lisatud on lihtsustatud initsialiseerimise koodi variant (crt0), mis on kinnitatud t\u00e4idetavale failile ja mille t\u00e4itmine toimub enne peamise funktsiooni main() juhtimise \u00fcleandmist.<\/p>\n<p>Picolibc 1.1 versioonis:<\/p>\n<ul>\n<li class=\"l\"> Kohandatud teek lisati toe pakkumiseks tehnoloogia jaoks \"<noindex><a rel=\"nofollow\" href=\"http:\/\/www.keil.com\/support\/man\/docs\/armcc\/armcc_pge1358787046598.htm\">semihosting<\/a><\/noindex>\", mis v\u00f5imaldab koodil, mis t\u00e4idab \u00fclesandeid siluri v\u00f5i emulaatori keskkonnas, kasutada host-s\u00fcsteemi sisendi\/v\u00e4ljundi mehhanisme;\n<li class=\"l\"> S\u00fcsteemide jaoks, mis toetavad open, close, read ja write s\u00fcsteemi k\u00f5nesid, on tinystdio'sse lisatud standardiseeritud POSIX-i stdio sisendi\/v\u00e4ljundi liidesed, sealhulgas fopen ja fdopen funktsioonid, samuti stdin\/out\/err sidumine POSIX-failidesse;\n<li class=\"l\"> Viimased muudatused on viidud \u00fcle newlib koodibaasi. Sealhulgas on lisatud libm paikapidavad <noindex><a rel=\"nofollow\" href=\"http:\/\/man7.org\/linux\/man-pages\/man3\/fenv.3.html\">fenv.h<\/a><\/noindex>, mida saab kasutada s\u00fcsteemides, mis ei toeta ujuvpunkte;\n<li class=\"l\"> Lisatud on n\u00e4idis rakenduse \"Hello world\" kompileerimiseks picolibc puhul ARM ja RISC-V s\u00fcsteemidele;\n<li class=\"l\"> Eemaldatud kataloogid newlib, libm ja mathfp, milles sisaldus kasutamata eksperimenteeritud kood.\n<\/ul>\n<p><noindex><a rel=\"nofollow\" name=\"link\"><\/a><\/noindex><\/p>\n<p>Allikas: <a \ncontent=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=51873\">opennet.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041a\u0438\u0442 \u041f\u0430\u043a\u043a\u0430\u0440\u0434 (Keith Packard), \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Debian, \u043b\u0438\u0434\u0435\u0440 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 X.Org \u0438 \u0441\u043e\u0437\u0434\u0430\u0442\u0435\u043b\u044c \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u0430 X-\u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0439, \u0432\u043a\u043b\u044e\u0447\u0430\u044f XRender, XComposite \u0438 XRandR, \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b \u0432\u044b\u043f\u0443\u0441\u043a \u043d\u043e\u0432\u043e\u0439 \u0441\u0442\u0430\u043d\u0434\u0430\u0440\u0442\u043d\u043e\u0439 \u0421\u0438-\u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 PicoLibc 1.1, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0435\u043c\u043e\u0439 \u0434\u043b\u044f \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u043d\u0430 \u0432\u0441\u0442\u0440\u0430\u0438\u0432\u0430\u0435\u043c\u044b\u0445 \u0443\u0441\u0442\u0440\u043e\u0439\u0441\u0442\u0432\u0430\u0445 \u0441 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u044b\u043c \u0440\u0430\u0437\u043c\u0435\u0440\u043e\u043c \u043f\u043e\u0441\u0442\u043e\u044f\u043d\u043d\u043e\u0433\u043e \u0445\u0440\u0430\u043d\u0438\u043b\u0438\u0449\u0430 \u0438 \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u043e\u0439 \u043f\u0430\u043c\u044f\u0442\u0438. \u041f\u0440\u0438 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u043a\u0435 \u0447\u0430\u0441\u0442\u044c \u043a\u043e\u0434\u0430 \u0437\u0430\u0438\u043c\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u0430 \u0438\u0437 \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 newlib \u043e\u0442 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 \u0421ygwin \u0438 AVR Libc, \u0440\u0430\u0437\u0432\u0438\u0432\u0430\u0432\u0448\u0435\u0439\u0441\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-52800","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.1.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041a\u0438\u0442 \u041f\u0430\u043a\u043a\u0430\u0440\u0434 (Keith Packard), \u0430\u043a\u0442\u0438\u0432\u043d\u044b\u0439 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a Debian, \u043b\u0438\u0434\u0435\u0440 \u043f\u0440\u043e\u0435\u043a\u0442\u0430 X.Org \u0438 \u0441\u043e\u0437\u0434\u0430\u0442\u0435\u043b\u044c \u043c\u043d\u043e\u0436\u0435\u0441\u0442\u0432\u0430 X-\u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u0439, 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