+ *:Linux:*:*)
+ # The BFD linker knows what the default object file format is, so
+ # first see if it will tell us.
+ ld_help_string=`ld --help 2>&1`
+ if echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations: elf_i[345]86"; then
+ echo "${UNAME_MACHINE}-unknown-linux" ; exit 0
+ elif echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations: i[345]86linux"; then
+ echo "${UNAME_MACHINE}-unknown-linuxaout" ; exit 0
+ elif echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations: i[345]86coff"; then
+ echo "${UNAME_MACHINE}-unknown-linuxcoff" ; exit 0
+ elif echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations: m68kelf"; then
+ echo "${UNAME_MACHINE}-unknown-linux" ; exit 0
+ elif echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations: m68klinux"; then
+ echo "${UNAME_MACHINE}-unknown-linuxaout" ; exit 0
+ elif echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations: elf32ppc"; then
+ echo "powerpc-unknown-linux" ; exit 0
+ elif test "${UNAME_MACHINE}" = "alpha" ; then
+ echo alpha-unknown-linux ; exit 0
+ elif test "${UNAME_MACHINE}" = "sparc" ; then
+ echo sparc-unknown-linux ; exit 0
+ else
+ # Either a pre-BFD a.out linker (linuxoldld) or one that does not give us
+ # useful --help. Gcc wants to distinguish between linuxoldld and linuxaout.
+ test ! -d /usr/lib/ldscripts/. \
+ && echo "${UNAME_MACHINE}-unknown-linuxoldld" && exit 0
+ # Determine whether the default compiler is a.out or elf
+ cat >dummy.c <<EOF
+main(argc, argv)
+int argc;
+char *argv[];
+{
+#ifdef __ELF__
+ printf ("%s-unknown-linux\n", argv[1]);
+#else
+ printf ("%s-unknown-linuxaout\n", argv[1]);
+#endif
+ return 0;
+}
+EOF
+ ${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0
+ rm -f dummy.c dummy
+ fi ;;
+# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. earlier versions
+# are messed up and put the nodename in both sysname and nodename.
+ i[34]86:DYNIX/ptx:4*:*)
+ echo i386-sequent-sysv4
+ exit 0 ;;
+ i[34]86:*:4.*:* | i[34]86:SYSTEM_V:4.*:*)