On 12 Feb 2018, at 15:18, John Paul Adrian Glaubitz <glaub...@physik.fu-berlin.de> wrote: > On 02/12/2018 04:16 PM, Holger Levsen wrote: >> Downgrading the bug to normal, though I guess you can also close it. The >> openjdk packages have the same issue. (But maybe you want to keep it >> open to implement a message to the user saying "arg, /proc not mounted, >> but we need it, aborting" or some such.) > The Rust compiler has the same issue. Without /proc, it won't be able > to find it's shared libraries. I'm not 100% sure, but I guess it's > an issue when using dlopen() to load the libraries afterwards, but I never > bothered to look into the details.
Ok, found it: _dl_get_origin tries to readlink /proc/self/exe to find the value of $ORIGIN, falling back on the (empty) LD_ORIGIN_PATH environment variable when that fails; I assume it does this instead of using readlink on the value of AT_EXECFN in auxv due to the possible race condition. This isn't really a bug in ghc, as it's a system limitation, though I guess for Debian we could avoid the use of $ORIGIN as we know where ghc will be installed, though given ghc-stageX are executed during the build that might be awkward without either re-linking or setting LD_LIBRARY_PATH (or equivalent). James
