On Sun, Dec 07, 2014 at 12:24:42AM -0500, Mark H Weaver wrote: John Darrington writes: > I downloaded the snapshot from http://hydra.nixos.org/build/17611516 > > and ran into the following problems: > > My system does not have a libc with threading, so I configured guile and > dependencies with --without-threads (or --disable-threads as appropriate). > > > I get the following error: > > > Throw without catch before boot: > > Error while printing exception: [...] > gdb suggests that the problem is that iconv fails and sets the error > message: "Cannot find thread-local variables on this target" That error comes from GDB while trying to access 'errno', which is a thread-local variable. We still don't know the value of 'errno'. As a temporary hack, you could replace the call to 'scm_encoding_error' at strings.c:2106 with a call to 'printf' that prints out the value of 'errno'. I guess that both iconv and gdb are somewhat broken on your system. You are right. I was linking to the wrong libiconv I think however, that your suggested work-around or something similar could do with pushing to the master: There is a circular dependency here: If iconv_open fails, guile tries to report the error using scm_locale_string which itself calls iconv_open ... J' -- PGP Public key ID: 1024D/2DE827B3 fingerprint = 8797 A26D 0854 2EAB 0285 A290 8A67 719C 2DE8 27B3 See http://sks-keyservers.net or any PGP keyserver for public key.