@@ -1,19 +1,22 @@
 Supported CPUs:  (Put the GNU config.guess values here.)
-     i386     i486-unknown-linux, i386-unknown-sysv4.0, i386-pc-solaris2.6,
-              i486-unknown-sco3.2v4.2, i386-pc-cygwin32, i386-pc-win32
-     m68k     m68k-next-bsd, m68k-next-nextstep3, m68k-sun-sunos4.0,
-              m68k-unknown-linux
-     mips     mips-sgi-irix4.0.5, mips-sgi-irix5.2, mips-sgi-irix5.3,
-              mips-sgi-irix6.2, mips-sgi-irix6.4
-     sparc    sparc-sun-sunos4.1.1, sparc-sun-solaris2.3, sparc-sun-solaris2.4
-     alpha    alpha-dec-osf3.0, alpha-dec-osf4.0
-     hppa     hppa1.0-hp-hpux8.00, hppa1.1-hp-hpux9.05, hppa1.1-hp-hpux10.01,
-              hppa2.0-hp-hpux10.20
-     arm      -- untested
-     rs6000   rs6000-ibm-aix3.2.5, powerpc-ibm-aix4.1.4.0,
-              powerpc-unknown-linux, powerpc-apple-darwin6.8
-     m88k     m88k-tektronix-sysv3
-     convex   c32-convex-bsd
-     ia64     ia64-unknown-linux
-     x86_64   x86_64-suse-linux
+     i386       i486-unknown-linux, i386-unknown-sysv4.0, i386-pc-solaris2.6,
+                i486-unknown-sco3.2v4.2, i386-pc-cygwin32, i386-pc-win32
+     m68k       m68k-next-bsd, m68k-next-nextstep3, m68k-sun-sunos4.0,
+                m68k-unknown-linux
+     mips       mips-sgi-irix4.0.5, mips-sgi-irix5.2, mips-sgi-irix5.3,
+                mips-sgi-irix6.2, mips-sgi-irix6.4
+     sparc      sparc-sun-sunos4.1.1, sparc-sun-solaris2.3,
+                sparc-sun-solaris2.4
+     alpha      alpha-dec-osf3.0, alpha-dec-osf4.0
+     hppa       hppa1.0-hp-hpux8.00, hppa1.1-hp-hpux9.05, hppa1.1-hp-hpux10.01,
+                hppa2.0-hp-hpux10.20
+     arm        -- untested
+     powerpc    rs6000-ibm-aix3.2.5, powerpc-ibm-aix4.1.4.0,
+                powerpc-unknown-linux, powerpc-apple-darwin6.8
+     powerpc64  powerpc64-unknown-linux (gcc -m64)
+     m88k       m88k-tektronix-sysv3
+     convex     c32-convex-bsd
+     ia64       ia64-unknown-linux
+     x86_64     x86_64-suse-linux
+     s390       -- untested