[cfe-dev] [libcxxabi] Contributing ARM EHABI support for libcxxabi

[David Fang]

> Regarding the build system, I think it brings up the bigger issue of 
> what sort of build system we want for libcxxabi.  The script is a quick 
> way to get building.  But, it is not how Apple actual builds the 
> shipping libunwind (which is a local xcode project).  What sort of build 
> system would others like?

My $.02: Any build system will do, as long as there's are hooks to build 
the library using any compiler (e.g. pre-installed, clang++), install 
anywhere, and any link to any location of libc++, since the tests depend 
on a built libc++, not necesarily the system's.  (libc++'s CMakefiles have 
a few hard-coded references to /usr/lib)

Here's my local Makefile I use to build libcxxabi:
https://github.com/fangism/libcxxabi/blob/powerpc-darwin8/lib/Makefile.darwin

and to test libcxxabi:
https://github.com/fangism/libcxxabi/blob/powerpc-darwin8/test/Makefile

I don't mind if libcxxabi has its own standalone build/Makefile, separate 
from LLVM's, since I plan to use it into a custom bootstrap flow.
</$.02>

David

-- 
David Fang
http://www.csl.cornell.edu/~fang/