Is it possible to set up Clang for cross compiling for the ARM processor? The host will likely be on x86 ( AMD64 - Probably Ubuntu 12.04 ) and the target would be ARM ( Raspberry Pi as well as Pandaboard - will do separate compilations for each ), I may at some point also wish to cross compile for the PowerPC architecture? The program source is in C.
27
votes
Maybe this helps Is cross-compiling for ARM on x86 with llvm/Clang possible?
– Olaf Dietsche
github.com/dwelch67/raspberrypi I have examples that use clang in this repo and others. 3.2 allows for compiling straight to object rather than taking a step through assembly.
– old_timer
stackoverflow.com/questions/5878292/…
– MoDJ
2 Answers
30
votes
To cross-compile for Raspberry Pi running soft-float Linux distros add flags -ccc-host-triple arm-eabi -marm -mfpu=vfp -mcpu=arm1176jzf-s -mtune=arm1176jzf-s -mfloat-abi=softfp
To cross-compile for Raspberry Pi running hard-float Linux distros use the flags -ccc-host-triple arm-eabi -marm -mfpu=vfp -mcpu=arm1176jzf-s -mtune=arm1176jzf-s -mfloat-abi=hard
To cross-compile for Pandaboard use flags -ccc-host-triple arm-eabiv7 -mthumb -mfpu=neon-fp16 -mcpu=cortex-a9 -mtune=cortex-a9 -mfloat-abi=hard (assuming that your Pandaboard runs Ubuntu)
Note: more recent clang version use -target option instead of -ccc-host-triple
1
votes
See EmbToolkit project. It gives ability to generate clang/llvm or gcc based cross compiler toolchain.
