{"id":103436,"date":"2022-02-25T21:37:00","date_gmt":"2022-02-25T19:37:00","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11"},"modified":"2022-02-25T21:37:00","modified_gmt":"2022-02-25T19:37:00","slug":"v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/v-yadre-linux-5-18-planiruyut-razreshit-ispolzovanie-standarta-yazyka-si-c11","title":{"rendered":"V jadre Linux 5.18 pl\u00e1nuj\u00fa povoli\u0165 pou\u017e\u00edvanie \u0161tandardu jazyka C11","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

V procese diskusie o s\u00fabore patchov na opravu probl\u00e9mov s\u00favisiacich s chybami triedy Spectre v k\u00f3de na pr\u00e1cu s prepojen\u00fdmi zoznamami sa uk\u00e1zalo, \u017ee by sa probl\u00e9m dal elegantnej\u0161ie vyrie\u0161i\u0165, keby sa do jadra prip\u00fa\u0161\u0165al k\u00f3d v jazyku C, ktor\u00fd zodpoved\u00e1 nov\u0161ej verzii \u0161tandardu. V s\u00fa\u010dasnosti mus\u00ed pridan\u00fd k\u00f3d do jadra vyhovova\u0165 \u0161pecifik\u00e1cii ANSI C (C89), ktor\u00e1 bola stanoven\u00e1 u\u017e v roku 1989. <\/p>\n

Probl\u00e9m s\u00favisiaci so Spectre v k\u00f3de bol sp\u00f4soben\u00fd pokra\u010dovan\u00edm v pou\u017e\u00edvan\u00ed samostatne definovan\u00e9ho iter\u00e1tora po cykle \u2014 na prech\u00e1dzanie prvkami prepojen\u00e9ho zoznamu sa pou\u017e\u00edva makro a ke\u010f\u017ee iter\u00e1tor cyklu sa odovzd\u00e1va do tohto makra, je definovan\u00fd mimo samotn\u00e9ho cyklu a zost\u00e1va dostupn\u00fd aj po \u0148om. Pou\u017eitie \u0161tandardu C99 by umo\u017enilo definova\u0165 premenn\u00e9 pre cyklus v bloku for(), \u010do by probl\u00e9m vyrie\u0161ilo bez zlo\u017eit\u00fdch obch\u00e1dzok. <\/p>\n

Linus Torvalds s\u00fahlasil s my\u0161lienkou implement\u00e1cie podpory nov\u0161\u00edch \u0161pecifik\u00e1ci\u00ed a navrhol prechod v jadre 5.18 na pou\u017eitie \u0161tandardu C11, ktor\u00fd bol publikovan\u00fd v roku 2011. Pri predbe\u017enej kontrole zostavenie v GCC a Clang v novom re\u017eime prebehlo bez chyby. Ak pri podrobnej\u0161om testovan\u00ed nevznikn\u00fa nepredv\u00eddan\u00e9 probl\u00e9my, v zostavovac\u00edch skriptoch jadra 5.18 bude vo\u013eba \u2018\u2014std=gnu89\u2019 nahraden\u00e1 za \u2018\u2014std=gnu11 -Wno-shift-negative-value\u2019. Zva\u017eovala sa aj mo\u017enos\u0165 vyu\u017eitia \u0161tandardu C17, ale v tomto pr\u00edpade by bolo potrebn\u00e9 zv\u00fd\u0161i\u0165 minim\u00e1lne podporovan\u00fa verziu GCC. Zavedenie podpory C11 zapad\u00e1 do aktu\u00e1lnych po\u017eiadaviek na verziu GCC (5.1).
\n
Zdroj: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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[…]<\/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-103436","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47V jadre Linux 5.18 pl\u00e1nuj\u00fa povoli\u0165 pou\u017e\u00edvanie \u0161tandardu jazyka C C11 | ProHoster","description":"V procese diskusie o s\u00fabore patchov na opravu probl\u00e9mov s\u00favisiacich s chybami triedy Spectre v k\u00f3de na pr\u00e1cu s prepojen\u00fdmi zoznamami sa uk\u00e1zalo, \u017ee by sa probl\u00e9m dal elegantnej\u0161ie vyrie\u0161i\u0165, keby sa do 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