[swift-dev] Compile Error - Arch Linux

[Dmitri Gribenko]

On Fri, Dec 4, 2015 at 6:08 AM, Ryan Lovelett
<swift-dev at ryan.lovelett.me> wrote:
> I know that Arch Linux is not a "Supported Target Platforms" so I guess
> this may be off topic.
>
> However, I'm trying to make an PKGBUILD script so that Swift can be
> installed from the AUR (and perhaps eventually from the main
> repositories). See: https://github.com/RLovelett/swift-aur
>
> For the most part everything is going swimmingly until it goes to link
> the shared library libswiftCore.so. So as not to clutter up this message
> with the full log (see attached allout.txt). The germane part is that it
> is failing to link the references from `pthread_rwlock_rdlock`,
> `pthread_rwlock_unlock`, `pthread_rwlock_wrlock`, `dlopen`, `dlsym` and
> `dlclose`. As far as I know they all come from pthreads and dl (e.g.,
> `-lpthread` and `-ldl`) which can clearly be seen in the failed command
> as having been sent to clang++.
>
> I guess I should also say the command I am using to build is
> `swift/utils/build-script -R`; though if you want to see all the
> commands checkout the Github URL above.

I think the issue is that '-lpthread -ldl' are being specified too
early on the link line, before the object files.  Could you try
editing the link command to put '-lpthread -ldl' at the end and
retrying it in the build directory after the failure?

For a package build, I would also recommend running the build script
in preset mode and using the 'buildbot_linux_1404' preset:

$ ./swift/utils/build-script --preset=buildbot_linux_1404
installable_package=/tmp/swift.tar.gz
install_destdir=/tmp/swift-install

This will build the package the same way as the swift.org packages.

Dmitri

-- 
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/