What is the standalone toolchain?

android toolchain android-ndk-r5
sraddhav picture sraddhav · Nov 6, 2012 · Viewed 12k times · Source

I am trying to understand what a standalone toolchain means. Following are my findings. A toolchain which is ready to use with all the configuration that is the system headers and libraries in the correct path . For Android it will also have the API headers in the path where the toolchain can look it up. Why the term "standalone"? This probably will be different that the regular toolchain in the sense that the R T will need to be configured and made ready for android use withe sysroot and libc header paths given etc. Please comment .

Hmm, I was compiling for android and one process was running a script called make-standalone-toolchain.sh a standalone toolchain is created .I was going through this script to understand what this is doing. Not really good at shell scripting. But made out certain things. ""Generate a customized Android toolchain installation that includes a working sysroot. The result is something that can more easily be used as a standalone cross-compiler, e.g. to run configure and make scripts." --toolchain arch ndk-dir package-dir system platform variables are set Compute source sysroot SRC_SYSROOT="$NDK_DIR/platforms/$PLATFORM arch-$ARCH" Copying sysroot headers and libraries... libstdc++ headers and libraries... prebuilt binaries.all into a temporary folder then a copying from Tmp dir to install dir creating a tar ie a package file to add the tmpdir wanted to know what exactly is happening here or a link or suggestion where to look.but ofcourse dont want to read very elaborate manuals. ~

Answer

crusherjoe2000 picture crusherjoe2000 · May 2, 2013

This blog posting may answer your question:

http://clseto.mysinablog.com/index.php?op=ViewArticle&articleId=3480794

There is a recommended way to build native C/C++ program on Android: List your source files in a script (Android.mk) and run 'ndk-build'. It may not be a problem if you are writing new programs but if you already have a working build script (like those open source softwares) which can build you program nicely on Linux, it would be a headache to migrate your script to Android.mk. All you need in this situation is a C/C++ cross compiler and then replace the variables in your script (such as CC, CXX, AR, AS, RANLIB, ...) to something like 'arm-linux-androideabi-gcc', 'arm-linux-androideabi-g++', ...

Fortunatley, inside the 'Android NDK Dev Guide', there is a section 'Standalone Toolchain' which just describes what we need....

Related questions

How to tell Android NDK to use a different toolchain

I've downloaded a custom toolchain (linaro) to build ARM based Android apps. How do I tell the NDK to use it? Can I define or set something in Android.mk and Application.mk that would allow me to do that? …

Read More
android NDK - make standalone toolchain fails

I tried to make a standalone Android NDK toolchain on Linux 64 bit: ~/build/android-ndk-r9/build/tools $ ./make-standalone-toolchain.sh --platform=android-14 --ndk-dir=/home/user/build/android-ndk-r9 --system=linux-x86_64 --install-dir=/home/user/build/android-14-toolchain Auto-config: --toolchain=arm-linux-androideabi-4.6 Copying prebuilt binaries... No …

Read More
Android-NDK build system (building hello-gl2)

I downloaded and installed Android-NDK on my Archlinux, using this package. Got no issues building (and running) the sample hello-jni following the guide on this page, but if I try to do the same with hello-gl2 I get some errors; …

Read More