Compilation with Clang?

[SharanSMenon]

How can I compile circle with clang instead of arm-gcc?

I am on a M1 MacBook.

[rsta2]

Normally Clang is not supported officially, but I made an attempt to support it earlier on the branch clang-support. There are several limitations with this version, but if you want to try it, let me know, so I can I give you instructions on how to configure it.

[rsta2]

You need a Config.mk file in the Circle root directory with a contents like this:

CLANG = 1
AARCH = 64
RASPPI = 3

If your linker still does not recognize the --Map option, you can try to remove -Wl,--Map,$(TARGET).map in this line.

[SharanSMenon]

I built circle using the Config.mk that you showed me. When I try to built the sample without the -Wl,--Map,$(TARGET).map, I get this error now:

  LD    kernel8.elf
ld: unknown option: --section-start=.init=0x80000
clang: error: linker command failed with exit code 1 (use -v to see invocation)
clang-13: error: linker (via gcc) command failed with exit code 1 (use -v to see invocation)
make: *** [kernel8.img] Error 14

[rsta2]

The linker, which is spawned by clang seems to be incompatible with the one, I have here. I tested the clang support on Linux only. It would require a longer session to get this running. Given that the clang support is not officially available, I'm in doubt, if it makes sense to continue here.

[SharanSMenon]

So does that mean that there are no options to compile this on an Apple Silicon Mac?

I don't think arm-gcc works on M1 Macs.

[rsta2]

Honestly I don't know. I do not have a Mac and are not familiar with it. Perhaps somebody else tried to build Circle on a Mac?

[rsta2]

I have merged the clang-support branch to the develop branch to be part of the next release. The branch clang-support has been removed. There are instructions on using Clang/LLVM to build Circle in the file doc/clang-support.txt. The problem with the linker on Macs is not solved so far. It would be great, if somebody could deal with this, who has a Mac, because I do not have one.