Build log says: [...] Checking ./stackovf.test Stack soft limit set to 300K Failure - m4 aborted unexpectedly Output from m4: m4: internal error detected; please report this bug to <bug-m4@gnu.org>: Segmentation fault
Complete build log here: https://buildd.debian.org/status/fetch.php?pkg=m4&arch=sparc&ver=1.4.17-1&stamp=1382635074 The build was attempted on two different sparc systems running Debian unstable: https://buildd.debian.org/status/logs.php?pkg=m4&ver=1.4.17-1&arch=sparc I know there is a small chance that this is really a bug in the kernel or a bug in libc, but the error message says "report this to bug-m4@gnu.org", so this is the bug report that you requested. Thanks.