[cfe-dev] [libcxx] Instructions for building Windows or Cygwin binaries?

[Jonathan Roelofs via cfe-dev]

On 2/10/16 12:54 PM, Craig, Ben via cfe-dev wrote:
> I am attempting to build libcxx through Cygwin.  My goal is to make sure
> that I don't make the Windows build any worse.  Since I don't plan on
> using the results for anything other than running the tests, I'm open to
> whichever variant of Windows / Cygwin building is most convenient.
>
> Alternatively, if all the Windows builds of libcxx are known to be
> completely busted and unsupported at this time, then I'll stop worrying
> about it, and I'll just make my best guess as to the changes that I need
> to make.
>
> I've seen this page...
> http://libcxx.llvm.org/results.Windows.html
> ... but it appears rather dated.  It mentions Clang (pre-3.1) for instance.
>
> I have attempted to get things running on my own, both through cmake,
> and with the buildit script.
> * Fully native Windows, with CMake and Visual Studio.
> ** Even with -DLLVM_BUILD_RUNTIME=ON, I couldn't get a Visual studio
> project out of cmake.
> * Cygwin, using the built-in version of clang (3.5.2) and buildit
> ** This headers with this version of gcc don't seem to support a lot of
> the c99 math functions (I think this is newlib?)
> * Cygwin, using the built-in version of gcc (4.9.3) and cmake
> ** Same set of missing c99 math functions
> * Cygwin, using i686-w64-mingw32-clang (3.5.1) and buildit
> ** With some source level hacks, I can get this to compile.  I get loads
> of linker errors, mostly involving exception handling (_Unwind_Resume
> and the personality function).
> ** I couldn't get libunwind to build, because of missing elf header
> parsing functions.
> ** I couldn't get a simple hello world program to run (though I could
> get it to link).
>
> So, any build bot recipes or other information out there on Windows
> and/or Cygwin builds?

I think K-ballo has some state on this.


Jon

>

-- 
Jon Roelofs
jonathan at codesourcery.com
CodeSourcery / Mentor Embedded