Re: clang++ and a modern C++ library
I tried with llvm-3.5.20140228p18 (the clang package), g++-4.9.2 and libstdc++-4.8.3, the next command: clang++ -std=c++11 -I/usr/local/include -I/usr/local/include/c++/4.9.2 -I/usr/local/include/c++/4.9.2/x86_64-unknown-openbsd5.6 -I/usr/include -L/usr/local/lib/gcc-lib/amd64-unknown-openbsd5.6/3.3.6 -L/usr/local/lib -nostdinc++ -lestdc++ test.cc Apparently everything works fine. Alright, let me update my scripts and give this a shot. --dave
clang++ and a modern C++ library
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Status update... I've been working on porting Rust over to OpenBSD by building a Rust cross-compiler for Linux that can target i386-unknown-openbsd and x86_64-unknown-openbsd. The largest roadblock on OpenBSD is the lack of a more recent GNU linker (ld). I have tried the 2.17 linker in the source tree and it doesn't work. To catch everybody up, the rust compiler is built on LLVM and uses C++1x which requires a newer compiler. I started by using 4.8.3 on OpenBSD but the old linker isn't working. Somebody suggested using clang on OpenBSD, but it appears that the port for clang++ doesn't include libc++. Is that correct? So clang++ doesn't have a new enough standard C++ library to do the job. I've tried using clang++ with the libstdc++ that is part of the gcc 4.8.3 port but I can't seem to figure out the magic set of parameters to clang++ to make it select the newer libstdc++ that is part of the gcc 4.8.3 port. I'm starting to think that this may not be possible without some catching up on toolchains for OpenBSD. And given the conservative nature of OpenBSD, it may be some time before the toolchains are modern enough to compile and link the Rust compiler. - --dave -BEGIN PGP SIGNATURE- iF4EAREIAAYFAlR7qwoACgkQvt/JvmUQuOmMmQD+KpYTqyiNJJBoZos7+CQnOTG4 XmsrUbU8lPtOGM9kBCoA/j7e+Ghe+1hHOqBNFZlyj9cx6AfWDjN30dJ/5vNvjoED =eufW -END PGP SIGNATURE- 0x6510B8E9.asc Description: application/pgp-keys 0x6510B8E9.asc.sig Description: PGP signature
Status on porting Rust to OpenBSD
-BEGIN PGP SIGNED MESSAGE- Hash: SHA256 Hi everybody, In my free time over the last few weeks I have been attempting to cross-compile the rust compiler using the same method that was used to add support for Dragonfly BSD. I started with the scripts from the Dragonfly effort and fixed them up to work with OpenBSD and Linux. All of my code and documentation is here: https://github.com/dhuseby/rust-cross-openbsd Currently, I'm stuck on stage 3. The part where all of the object files from both OpenBSD and Linux need to be linked together into an OpenBSD executable. I'm pretty certain the reason stage 3 doesn't complete is because of the old linker on OpenBSD. At the bottom of the README.md file I discuss some options on what to try next. I have also included build logs of all stages so that other people can see the output without jumping through all of the hoops I did. My options at this point are this: 1. Use the same version compiler/assembler/linker on Linux and OpenBSD so that the object files will be more compatible. Hopefully this will allow stage 3 to finish linking. 2. Apply my OpenBSD target patches to Rust and build a Linux rust compiler that knows how to target OpenBSD. Then I use Linux emulation on OpenBSD to run it to compile itself from scratch. 3. Figure out a way to get a newer linker working on OpenBSD. Thoughts? I'm looking for feedback. Are my assumptions and ideas right for why stage 3 doesn't successfully link? Any other ideas on what I can try? - --dave -BEGIN PGP SIGNATURE- iF4EAREIAAYFAlRtZBMACgkQvt/JvmUQuOkWZgD+PWr5ZmE6ypdQQuLgo1eHddGl e0LUUJi8CyvYpyNqUEMA/1EJCC6Z6mCeM11oGKhHxLdChv3qVjKg/6jXAoEIPynh =GD3X -END PGP SIGNATURE- 0x6510B8E9.asc Description: application/pgp-keys 0x6510B8E9.asc.sig Description: PGP signature
