Andreas Jaeger <aj(a)arthur.rhein-neckar.de&gt; writes: That's probably 21.1p2. The reason you don't see it is that on glibc2.x systems XEmacs uses the system malloc instead of its own doug lea allocator. The main reason for this is that we don't run into obscure and hard to debug problems like this. it seems awfully glibc specific to me. If I understand it correctly. It works because the glibc startup code works by calling this hook somewhere. Who says the Solaris startup code will do that? Jan P.S. Why does Glibc 2.1.x define I_SETSIG ? -- Jan Vroonhof http://www.math.ethz.ch/~vroonhof/ Mathematik, vroonhof ＠ math.ethz.ch HG E16, ETH-Zentrum, Tel: +41-1-6325456/25154 Raemistrasse 101, CH-8092 Zuerich. Fax: +41-1-6321085