Compiling Mono 3.x on Raspberry Pi
arm, makefile, mono, raspberry-pi, raspbian
Solution
There are two possible solutions to this:
- Compile mono from a tarball, not from git. A tarball is just a compressed package that contains all the sources ready to be compiled in a standalone way. For mono, you can find the tarballs if you go to http://www.go-mono.com/mono-downloads/ and click on the "Mono sources" link, which links to http://download.mono-project.com/sources/mono/. You would need mono 3.2.8 or newer because that is the first version to implement HardFloat support for ARM.
- Keep cloning from git, but use `make get-monolite-latest` command before `make`. More details here.
Problem
To get rid of the soft float vs. hard float ABI problem I tried to install an up-to-date version of mono on my Raspberry Pi with ``` git clone https://github.com/mono/mono.git cd mono git submodule init git submodule update ./autogen.sh --prefix=/usr/local make make install ``` The make command fails. The errors are as follows: ``` make[6]: gmcs: Command not found make[6]: *** [build/deps/basic-profile-check.exe] Error 127 *** The compiler 'gmcs' doesn't appear to be usable. *** You need Mono version 2.4 or better installed to build MCS *** Check mono README for information on how to bootstrap a Mono installation. make[5]: *** [do-profile-check] Error 1 make[4]: *** [profile-do--basic--all] Error 2 make[3]: *** [profiles-do--all] Error 2 make[2]: *** [all-local] Error 2 make[2]: Leaving directory `/home/pi/mono/runtime' make[1]: *** [all-recursive] Error 1 make[1]: Leaving directory `/home/pi/mono' ``` To fix this I tried to install mono with "sudo apt-get install mono-runtime" and then start the make again. But the error remains. Is it possible to get Mono 3.x working on ARM (the Raspberry Pi)?