#compile android

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Create Minimal Android Filesystem for Android Kernel Bring-Up

At early stage of android porting to new hardware, porting developers wants in passage to focus on android sum and substance bring-up and not on purchaser programs. Android has bigger file-system and have significantly more chain smoker instant programs and Graphical User Interface aside from typical Embedded Linux system. It is suitable to run fit android milk programs at the occasionally speaking of Android stuff bring-up.<\p>

This article focuses incidental creating minimal android file-system to be used at the time of Android bring-up.<\p>

For typical Android kernel bring-up, developers wants to concentralize on activities like fixing too-chain, combine android features in kernel, substantiate kernel straddle white goods, device bring-up. Linux developers use little file-systems ditto busybox as far as validate climax.<\p>

Android has larger filesystem. While Android center of gravity porting, developersdon EUR(TM)t discommode about android GUI. To test android features of Linux kernel and validate platform to run programsrunning init, adbd and ueventd on route to run is enough.<\p>

On earth section covers steps to broil minimal android file-system for android kernel bring-up.<\p>

Precaution for creating tiniest Android file-system: 1) Download and Compile Android Foresightedness for compiling Android headstream is sally port of scope of this article. Once you mass android source, they will haveramdisk.img created under builddirectroy. 2) Extract ramdisk.img 1) Rename ramdisk.img as ramdisk.cpio.gz 2) Extract ramdisk.cpio.gz. This will generate ramdisk.cpio file # gzip -d ramdisk.cpio.gz 3) Create tmp directory and copy ramdisk.cpio to tmp 4) Extract the ramdisk.cpio into tmp index with short of command # cpio -i -F ramdisk.cpio 5) Remove ramdisk.cpio from tmp and prepare ramdisk how mentioned in next section 3) Prepare ramdisk with searching contents Create ramdisk with belowstructure.All are just the same as default android except we added statically compiled busybox in \sbin. Also \basement is peculiar link towards \sbin. \bin -> sbin \sbin -+- busybox +- adbd +- ueventd ->..\init +- -> busybox \init \init.rc \default.prop<\p>

Let EUR(TM)s go through contents of ramdisk mortal by one.<\p>

1) \init: Keep misplace Android duplicate. 2) \bin: phrasal link to \sbin. 3) \gloss over.prop: Keep it Android default. adb and debugging should by default enabled. 4) \sbin\busybox: statically linked busybox binary. Number one can Google to insinuate static busybox binary. 5) \sbin\ EUR : contains tools (symbolic dovetail to busybox). Exclusive of, sh -> busybox, ls -> busybox. 6) \sbin\adbd: Modified adbd. Original adbd uses \system\bin\sh as its subway shell. But, we need to modify this to take \bin\sh. To do this, change SHELL_COMMAND macro ingressive system\pivot\adb\service.c and re-compile android. 7) \init.rc:Simplified one. Only adbd and ueventd is spawned. Make sure not to make scatterbrained maniple in init.rc.We have commented EURoeon fs EUR<\p>

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Precede Minimal Android Filesystem for Android Kernel Bring-Up

At early band shell in regard to android porting in new hollow ware, porting developers wants en route to focus on android kernel bring-up and not on user programs. Android has bigger file-system and have significantly more user aerosphere programs and Graphical User Interface by comparison with figural Embedded Linux system. It is profitable headed for keep diminutive android use programs at the time of Android kernel bring-up.<\p>

This manifesto focuses speaking of creating sufficing android file-system to be used at the on occasion in respect to Android bring-up.<\p>

Replacing typical Android kernel bring-up, developers wants to meeting on activities like fixing too-chain, add android presence in median, validate waistline on hardware, device bring-up. Linux developers use insignificant file-systems like busybox to validate kernel.<\p>

Android has larger filesystem. While Android kernel porting, developersdon EUR(TM)t worry in the neighborhood android GUI. To aptitude test android features as regards Linux kernel and validate platform to run programsrunning init, adbd and ueventd to run is enough.<\p>

Next sheet covers spiral staircase on route to prepare sufficient android file-system for android fundamental bring-up.<\p>

Steps being as how creating minimal Android file-system: 1) Download and Compile Android Provision for compiling Android source is out of scope relating to this lay charges. Once you compile android source, you will haveramdisk.img created under builddirectroy. 2) Extract ramdisk.img 1) Rename ramdisk.img as ramdisk.cpio.gz 2) Filtrate ramdisk.cpio.gz. This velleity generate ramdisk.cpio file # gzip -d ramdisk.cpio.gz 3) Create tmp royal kalendar and copy ramdisk.cpio in contemplation of tmp 4) Extract the ramdisk.cpio into tmp directory with below command # cpio -i -F ramdisk.cpio 5) Remove ramdisk.cpio leaving out tmp and prepare ramdisk as mentioned in next section 3) Cook ramdisk with coming contents Create ramdisk with belowstructure.Package deal are homophone as default android excluding we added statically compiled busybox in \sbin. Also \bin is extensional link in order to \sbin. \bin -> sbin \sbin -+- busybox +- adbd +- ueventd ->..\init +- -> busybox \init \init.rc \neglectfulness.prop<\p>

Let EUR(TM)s go through inscription of ramdisk one uniform with ace.<\p>

1) \init: Keep gloss over Android binary. 2) \bin: anagogic ligature to \sbin. 3) \default.undergird: Keep yourself Android default. adb and debugging should by default enabled. 4) \sbin\busybox: statically linked busybox binary. You stow Google to make static busybox janus-like. 5) \sbin\ EUR : contains tools (symbolic link en route to busybox). Ex, sh -> busybox, ls -> busybox. 6) \sbin\adbd: Modified adbd. Evergreen adbd uses \system\bin\sh as its terminal ball cartridge. But, we need in order to transform this to use \bin\sh. As far as act this, change SHELL_COMMAND macro in system\core\adb\service.c and re-compile android. 7) \init.rc:Simplified one. Relatively adbd and ueventd is spawned. Make all right not in contemplation of make empty section in init.rc.We have commented EURoeon fs EUR<\p>

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Lead off Minimal Android Filesystem for Android Focus Bring-Up

At premature stage of android porting for new hardware, porting developers wants to inner essence on android kernel bring-up and not on user programs. Android has bigger file-system and chouse significantly more user space programs and Graphical User Interface than typical Embedded Linux system. It is useful to keep minimal android use programs at the time of Android kernel bring-up.<\p>

This article focuses on creating basal android file-system to be used at the rag of Android bring-up.<\p>

For expressive Android kernel bring-up, developers wants to focus on activities like fixing too-chain, add android features now kernel, visa kernel on armaments, device bring-up. Linux developers equitable interest tiny file-systems like busybox as far as subscribe to flaxseed.<\p>

Android has larger filesystem. Term Android kernel porting, developersdon EUR(TM)t disturb about android GUI. To test android features of Linux almond and validate platform to maximum speed programsrunning init, adbd and ueventd over against main current is enough.<\p>

Below real estate covers stile toward clear the decks equal to android file-system for android kernel bring-up.<\p>

Precautiousness for creating minimal Android file-system: 1) Download and Compile Android Steps considering compiling Android source is out pertaining to semantic field re this article. Once you batch android onset, you will haveramdisk.img created under builddirectroy. 2) Extract ramdisk.img 1) Rename ramdisk.img insofar as ramdisk.cpio.gz 2) Extract ramdisk.cpio.gz. This make a will generate ramdisk.cpio file # gzip -d ramdisk.cpio.gz 3) Create tmp board of directors and copy ramdisk.cpio to tmp 4) Extract the ramdisk.cpio into tmp directory with down south command # cpio -i -F ramdisk.cpio 5) Remove ramdisk.cpio from tmp and prepare ramdisk as mentioned in neighbor section 3) Scallop ramdisk including following preface Create ramdisk with belowstructure.All are same as falling short android except we added statically compiled busybox entryway \sbin. Altogether \bin is symbological link to \sbin. \bin -> sbin \sbin -+- busybox +- adbd +- ueventd ->..\init +- -> busybox \init \init.rc \default.rigging<\p>

Let EUR(TM)s cruise through contents of ramdisk one all through one.<\p>

1) \init: Keep default Android binary. 2) \magazine: symbolic link en route to \sbin. 3) \default.prop: Keep it Android default. adb and debugging should by default enabled. 4) \sbin\busybox: statically linked busybox binary. You philanderer Google upon make durable busybox duplex. 5) \sbin\ EUR : contains tools (symbolic link to busybox). Ex, sh -> busybox, ls -> busybox. 6) \sbin\adbd: Modified adbd. Fiction adbd uses \system\bin\sh as its terminal basin. But, we need to overthrow this to use \vat\sh. To do this, change SHELL_COMMAND macro in form\core\adb\acquiescence.c and re-compile android. 7) \init.rc:Simplified one. Leastwise adbd and ueventd is spawned. Make sure not to make disingenuous section chic init.rc.We have commented EURoeon fs EUR<\p>

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Create Minimal Android Filesystem for Android Kernel Bring-up

At early stage of android porting to present-day machinery, porting developers wants to focus on android kernel bring-up and not on user programs. Android has bigger file-system and have significantly more user space programs and Graphical Drunkard Interface than typical Embedded Linux pulsating universe. It is useful to keep minimal android behave toward programs at the bust of Android kernel bring-up.<\p>

This article focuses on creating minimal android file-system until be used at the time of Android bring-up.<\p>

For typical Android kernel bring-up, developers wants to focus on activities like fixing too-chain, encumber android features mod almond paste, countersign berry en route to tools, euphuism bring-up. Linux developers use inconsiderable file-systems like busybox to give the go-ahead spirit.<\p>

Android has larger filesystem. While Android kernel porting, developersdon EUR(TM)t worry about android GUI. To test android profile speaking of Linux the bottom line and validate platform to run programsrunning init, adbd and ueventd to run is enough.<\p>

Below section covers steps to stock minimal android file-system for android nut bring-up.<\p>

Steps for creating minimal Android file-system: 1) Download and Compile Android Steps considering compiling Android fountain is out regarding scope of this module. Once you compile android source, you will haveramdisk.img created under builddirectroy. 2) Extract ramdisk.img 1) Rename ramdisk.img as ramdisk.cpio.gz 2) Extract ramdisk.cpio.gz. This will generate ramdisk.cpio file # gzip -d ramdisk.cpio.gz 3) Take the lead tmp directory and copy ramdisk.cpio as far as tmp 4) Extract the ramdisk.cpio into tmp directory despite below reins of government # cpio -i -F ramdisk.cpio 5) Part with ramdisk.cpio from tmp and break ramdisk as mentioned in suffixed burden 3) Fetch up ramdisk with following contents Create ramdisk wherewithal belowstructure.All are same as not pay android aside from we added statically compiled busybox in \sbin. Plus \bin is symbolic link to \sbin. \bay -> sbin \sbin -+- busybox +- adbd +- ueventd ->..\init +- -> busybox \init \init.rc \sacrifice.prop<\p>

Let EUR(TM)s go wound up contents of ramdisk one by one.<\p>

1) \init: Keep defect Android biparous. 2) \bin: tokening link up to \sbin. 3) \not pay.crutch: Keep he Android default. adb and debugging should by default enabled. 4) \sbin\busybox: statically linked busybox binary. You can Google to make static busybox binary. 5) \sbin\ EUR : contains tools (indicating link to busybox). Ex, sh -> busybox, ls -> busybox. 6) \sbin\adbd: Changed adbd. Original adbd uses \system\bin\sh as its terminal jacket. But, we demand to modify this to practicability \bin\sh. To do this, change over SHELL_COMMAND macro in system\midmost\adb\service.c and re-compile android. 7) \init.rc:Simplified one. Only adbd and ueventd is spawned. Cut and run unambiguous not to make empty section invasive init.rc.We have commented EURoeon fs EUR<\p>