if test "$enable_debug" = yes && test "$ac_cv_prog_cc_g" = yes; thenSorry, I think I confused you:
CFLAGS="$CFLAGS -g"
fi
+ + /* Compile AMD Opteron using gcc in 64-bit mode */
+ if test "$GCC" = yes; then
+ case $host in
+ ia64-*) CFLAGS="$CFLAGS -m64"
+ LDFLAGS="$LDFLAGS -melf_x86_64";;
+ esac
+ fi
+
ia64-* is Intel's Itanium system. They are 64-bit only cpus (the 32-bit emulation is too slow to be usable). It's supported by multiple operating systems, among them HP UX, Linux, Windows. As far as I can see it's supported directly, by 7.3.3, at least RedHat builds their ia64 version without any patches.
x86_64 is AMD's Operon/Athlon 64 system. They support concurrent 32-bit and 64-bit. Right now only supported by Linux, BSD and Windows support expected soon.
Thus the test must be for "x86_64-*".
Martin: you are using debian-testing, correct? I've asked a Suse developer, and on their Linux distribution, -m64 is the default, i.e. you don't need any switches.
-- Manfred
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