Android Development in C - Revision history

MkWikiEnSysOp: /* Compiling GNU coreutils */

2022-02-04T18:17:12Z

Compiling GNU coreutils

@@ Line 163: / Line 163: @@
   src/sleep: ELF 32-bit LSB  executable, ARM, EABI5 version 1 (SYSV), statically linked, for GNU/Linux 2.6.32, BuildID[sha1]=06a81ace0e2dabd5491dea6923ce0832295ba3f8, not stripped
 [[Category:Android]]
 [[Category:Linux]]
 [[Category:Programming]]

MkWikiEnSysOp: Downloading: Reverting back to old version (Ubuntu 14.04, coreutils 8.21)

2022-02-04T18:09:05Z

Downloading: Reverting back to old version (Ubuntu 14.04, coreutils 8.21)

← Older revision		Revision as of 18:09, 4 February 2022
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	=== Downloading ===		=== Downloading ===

	I am developing on Ubuntu 18.04 ~~Bionic~~ which ships with coreutils 8.28. coreutils have a lot of dependencies (like autoconf, autopoint, patch...), so to keep things simple, I grab the sources that match my operating system's version: [https://launchpad.net/ubuntu/+archive/primary/+~~sourcefiles/coreutils/8.28-1ubuntu1~~/coreutils_8.28.orig.tar.xz coreutils_8.28.orig.tar.~~xz 5~~.0 MiB] [https://launchpad.net/ubuntu/+source/coreutils/8.28-~~1ubuntu1~~ Download page]		I am developing on Ubuntu 14.04 which ships with coreutils 8.21. coreutils have a lot of dependencies (like autoconf, autopoint, patch...), so to keep things simple, I grab the sources that match my operating system's version: [https://launchpad.net/ubuntu/+archive/primary/+files/coreutils_8.21.orig.tar.gz coreutils_8.21.orig.tar.gz 11.7 MiB] [https://launchpad.net/ubuntu/+source/coreutils/8.21-1ubuntu5.4 Download page]

	=== Customizing ===		=== Customizing ===

MkWikiEnSysOp: +Used Libraries

2022-02-04T16:30:43Z

+Used Libraries

@@ Line 11: / Line 11: @@
 * binutils-arm-linux-gnueabi (recommended)
-The program adb is required for communicating with the Android device. Package: android-tools-adb - Documentation can be found [http://developer.android.com/tools/help/adb.html here].
+The program <code>adb</code> is required for communicating with the Android device. Package: android-tools-adb - Documentation can be found [http://developer.android.com/tools/help/adb.html here].
 === Troubleshooting adb ===
@@ Line 24: / Line 24: @@
 [http://stackoverflow.com/questions/14460656/android-debug-bridge-adb-device-no-permissions?answertab=oldest#answer-15043526 Credits]
 === Mounting /system read-write ===

MkWikiEnSysOp: /* Customizing */

2022-02-03T20:51:34Z

Customizing

← Older revision		Revision as of 20:51, 3 February 2022
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	=== Customizing ===		=== Customizing ===

	After extracting the files from that archive, I do a "./configure" in the directory that contains the files. This process takes about ~~1 min~~ 45 sec. After that it is important to customize the "Makefile": Search for a line containing		After extracting the files from that archive, I do a "./configure" in the directory that contains the files. This process takes about 45 sec on my 6-core CPU. After that it is important to customize the "Makefile": Search for a line containing

	CC = gcc -std=gnu99		CC = gcc -std=gnu99
Line 106:		Line 106:
	and replace it by		and replace it by

	CC = arm-linux-gnueabi-gcc -~~std~~=~~gnu99~~ -static		CC = arm-linux-gnueabi-gcc
			CPP = arm-linux-gnueabi-g++

			if the system has the "/lib" link described above. Otherwise these lines should read

			CC = arm-linux-gnueabi-gcc -static
			CPP = arm-linux-gnueabi-g++ -static

			but be aware that the binaries will have a much greater size then.

	Why "-static"? Otherwise the programs get linked dynamically, so they depend on the loader to resolve linked libraries. When testing on my Ubuntu machine, it was no problem:		Why "-static"? Otherwise the programs get linked dynamically, so they depend on the loader to resolve linked libraries. When testing on my Ubuntu machine, it was no problem:
Line 112:		Line 120:
	qemu-arm -L /usr/arm-linux-gnueabi/ '''program'''		qemu-arm -L /usr/arm-linux-gnueabi/ '''program'''

	However, on my destination device running Cyanogenmod 9, I always get a "No such file or directory" error when trying to run those files.		However, on my destination device running Cyanogenmod 9, I always get a "No such file or directory" error when trying to run those files (unless "/lib" does not exist, see above).

	=== Building ===		=== Building ===

MkWikiEnSysOp: /* Downloading */

2022-02-03T20:42:46Z

Downloading

← Older revision		Revision as of 20:42, 3 February 2022
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	=== Downloading ===		=== Downloading ===

	I am developing on Ubuntu 18.04 Bionic which ships with coreutils 8.28. coreutils have a lot of dependencies (like autoconf, autopoint, patch...), so to keep things simple, I grab the sources that match my operating system's version: [~~hhttps~~://launchpad.net/ubuntu/+archive/primary/+sourcefiles/coreutils/8.28-1ubuntu1/coreutils_8.28.orig.tar.xz coreutils_8.28.orig.tar.xz 5.0 MiB] [https://launchpad.net/ubuntu/+source/coreutils/8.28-1ubuntu1 Download page]		I am developing on Ubuntu 18.04 Bionic which ships with coreutils 8.28. coreutils have a lot of dependencies (like autoconf, autopoint, patch...), so to keep things simple, I grab the sources that match my operating system's version: [https://launchpad.net/ubuntu/+archive/primary/+sourcefiles/coreutils/8.28-1ubuntu1/coreutils_8.28.orig.tar.xz coreutils_8.28.orig.tar.xz 5.0 MiB] [https://launchpad.net/ubuntu/+source/coreutils/8.28-1ubuntu1 Download page]

	=== Customizing ===		=== Customizing ===

MkWikiEnSysOp: Ubuntu 18.04 Bionic

2022-02-03T20:40:07Z

Ubuntu 18.04 Bionic

← Older revision		Revision as of 20:40, 3 February 2022
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	=== Downloading ===		=== Downloading ===

	I am developing on Ubuntu 14.04 which ships with coreutils 8.21. coreutils have a lot of dependencies (like autoconf, autopoint, patch...), so to keep things simple, I grab the sources that match my operating system's version: [~~https~~://launchpad.net/ubuntu/+archive/primary/+~~files~~/coreutils_8.21.orig.tar.gz coreutils_8.21.orig.tar.~~gz 11~~.7 MiB] [https://launchpad.net/ubuntu/+source/coreutils/8.21-~~1ubuntu5.4~~ Download page]		I am developing on Ubuntu 18.04 Bionic which ships with coreutils 8.28. coreutils have a lot of dependencies (like autoconf, autopoint, patch...), so to keep things simple, I grab the sources that match my operating system's version: [hhttps://launchpad.net/ubuntu/+archive/primary/+sourcefiles/coreutils/8.28-1ubuntu1/coreutils_8.28.orig.tar.xz coreutils_8.28.orig.tar.xz 5.0 MiB] [https://launchpad.net/ubuntu/+source/coreutils/8.28-1ubuntu1 Download page]

	=== Customizing ===		=== Customizing ===

MkWikiEnSysOp: Dynamically linking

2022-02-03T20:08:55Z

Dynamically linking

@@ Line 52: / Line 52: @@
 === Building and deploying ===
   arm-linux-gnueabi-gcc -static helloworld.c -o helloworld
   adb push helloworld /system/bin

MkWikiEnSysOp: +Category Android

2022-02-03T19:09:25Z

+Category Android

← Older revision		Revision as of 19:09, 3 February 2022
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			[[Category:Android]]
	[[Category:Linux]]		[[Category:Linux]]
	[[Category:Programming]]		[[Category:Programming]]

MkWikiEnSysOp: /* Packages required for ARM development in C */

2022-02-02T20:30:40Z

Packages required for ARM development in C

← Older revision		Revision as of 20:30, 2 February 2022
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	== Prerequisites ==		== Prerequisites ==

	=== Packages required for ARM development in C ===		=== Packages required/recommended for ARM development in C ===

	Most Android devices are equipped with a APU utilizing ARM architecture. Therefore, binaries for ARM must be created. The following packages must be used on Debian systems to install compilers for C and C++:		Most Android devices are equipped with a APU utilizing ARM architecture. Therefore, binaries for ARM must be created. The following packages must be used on Debian systems to install compilers for C and C++:
Line 9:		Line 9:
	* gcc-arm-linux-gnueabi		* gcc-arm-linux-gnueabi
	* g++-arm-linux-gnueabi		* g++-arm-linux-gnueabi
			* binutils-arm-linux-gnueabi (recommended)

	The program adb is required for communicating with the Android device. Package: android-tools-adb - Documentation can be found [http://developer.android.com/tools/help/adb.html here].		The program adb is required for communicating with the Android device. Package: android-tools-adb - Documentation can be found [http://developer.android.com/tools/help/adb.html here].

MkWikiEnSysOp at 19:08, 23 September 2021

2021-09-23T19:08:22Z

← Older revision		Revision as of 19:08, 23 September 2021
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	This article just describes how to build simple terminal application in C and C++ that finally ~~run~~ on an Android device. GUI development is not addressed.		This article just describes how to build a simple terminal application in C and C++ that finally runs on an Android device. GUI development is not addressed.

	== Prerequisites ==		== Prerequisites ==