Max, could you take a look at this? It's possible I messed up. Paul, we supposedly tested this an SGI running Irix 6.2, with gcc and MispPro cc. Paul, can you try this completely untested patch: Index: unexelfsgi.c =================================================================== RCS file: /usr/CVSroot/XEmacs/xemacs/src/unexelfsgi.c,v retrieving revision 1.8.2.4 diff -u -w -r1.8.2.4 unexelfsgi.c --- unexelfsgi.c 2000/11/17 10:42:25 1.8.2.4 +++ unexelfsgi.c 2000/12/05 10:53:28 ＠＠ -226,8 +226,9 ＠＠ fatal ("Can't fstat (%s): errno %d\n", old_name, errno); /* map old file into the address space. */ - if ( (old_base = (caddr_t) mmap ((caddr_t) 0, stat_buf.st_size, - PROT_READ, MAP_SHARED, old_file, 0)) < 0 ) + old_base = (caddr_t) mmap ((caddr_t) 0, stat_buf.st_size, + PROT_READ, MAP_SHARED, old_file, 0); + if (old_base == (caddr_t) MAP_FAILED) fatal ("Can't mmap (%s): errno %d\n", old_name, errno); old_file_h = (ElfW(Ehdr) *) old_base;