[llvm-dev] How to build LLVM linked to libc++abi? (original) (raw)

ardi via llvm-dev llvm-dev at lists.llvm.org
Sun Sep 30 14:40:11 PDT 2018

Hi!

I sometimes build LLVM with a static libc++.a in MacOS, so that I use the LLVM libc++ instead of the system-wide one. However, when doing so, I always get link errors when building LLVM, because the build system links with libc++.a, but not with libc++abi.a and so there are quite a few missing symbols that the linker cannot find.

My workaround (which always seems to work) is to embed libc++abi inside of libc++ (with libtool, for example), but that's a hack for being in a hurry. BTW, note that I'm talking about building LLVM itself, not my programs (when you build your programs it doesn't hurt to add -lc++abi to your link line, but when building LLVM, how are you supposed to do it? I've searched for a cleaner solution to this, but couldn't find any.

Isn't there any LLVM build option for simply telling "hey! don't forget to add -lc++abi whenever you link to libc++" ?

Thanks!

ardi

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