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I have a question regarding building geth executable from source code .
I am able to create the geth executable for windows and linux machines , both 64 bit systems.
How can i create the geth executable for the windows and linux 32 bit systems on my 64 bit machines ?
This is really just a general architecture-related/cross-compilation question, rather than an Ethereum-specific one.
Your 64-bit machines will attempt to build 64-bit binaries by default, so you need to tell them not to.
Without going into lots of detail here, have a look at the following Stack Overflow threads. (Note that these are Linux-only, so you'll need to poke around for Windows equivalents.)
For 32-bit Go compilation:
For 32-bit C compilation:
Having said all this, if you're building 32-bit binaries, which you plan to run on 32-bit machines, then it might be easier just to get access to those machines and build there...
Also note that 32-bit vanilla binaries are available from the official Downloads page, so if you're not making any code changes, it would be easier just to download the pre-built binaries. (I'll assume you are making code changes.)
For build of Geth on the Ubuntu 64 bit system you can proceed as below ( https://github.com/ethereum/go-ethereum/wiki/Installation-Instructions-for-Ubuntu )
Clone the repository to a directory of your choosing:
git clone https://github.com/ethereum/go-ethereum
Install latest distribution of Go (v1.7) if you don't have it already:
(procedure for go-lang installation https://github.com/ethereum/go- ethereum/wiki/Installing-Go#ubuntu-1404)
Building geth requires Go and C compilers to be installed:
sudo apt-get install -y build-essential golang
Finally, build the geth program using the following command.
cd go-ethereum
make geth ( or run make all to build every thing )
