[cfe-dev] Using clang for cross-compiling to Cortex M4

[Rick Mann]

Definitely C++, but RTTI and exceptions aren't necessary (although, nice to have).

On Jun 3, 2014, at 11:19 , James Gregurich <bayoubengal at mac.com> wrote:

> Do you intend to use C++ or just C?
> I assume your target is Linux?
> 
> 
> 
> On Jun 2, 2014, at 10:00 PM, Rick Mann <rmann at latencyzero.com> wrote:
> 
>> I'm having a hard time figuring out how to build clang/llvm to let me target a small Cortext M4 MCU. I've got HEAD clang installed, but apparently no runtime or standard libraries. I've read through
>> 
>> 	http://clang.llvm.org/docs/CrossCompilation.html
>> 
>> and took a look at
>> 
>> 	http://llvm.org/docs/CMake.html
>> 
>> It talks about how to build LLVM to target an architecture, but I thought LLVM was able to target all its targets without having to be built specifically for each target. The clang/llvm I have install has all targets enabled, and I can pass it -target arm-none-eabi -mcpu=cortext-m4, and it seems to do the right thing.
>> 
>> What I'd like to do is make a homebrew formula to build an LLVM-based toolchain to target small ARM MCUs (I realize I'll have to use GNU binutils to link, that's fine). But I can't really figure out how to build it even manually.
>> 
>> 
>> -- 
>> Rick
>> 
>> 
>> 
>> 
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> 


-- 
Rick