On Core 2 Duo, I got
[EMAIL PROTECTED] tmp]$ /usr/gcc-4.2/bin/gcc -mtune=native -S x.i -v
...
/usr/gcc-4.2/libexec/gcc/x86_64-unknown-linux-gnu/4.2.0/cc1 -fpreprocessed x.i
-mtune=nocona -quiet -dumpbase x.i -auxbase x -version -o x.s
...
On Core Duo, I got
[EMAIL PROTECTED] tmp]$ /usr/gcc-4.2/bin/gcc -mtune=native -S x.i -v
...
/usr/gcc-4.2/libexec/gcc/i686-pc-linux-gnu/4.2.0/cc1 -fpreprocessed x.i
-mtune=prescott -quiet -dumpbase x.i -auxbase x -version -o x.s
--
Summary: [4.2/4.3]: -mtune=native is wrong on Core 2 Duo and Core
Duo
Product: gcc
Version: 4.2.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
AssignedTo: hjl at lucon dot org
ReportedBy: hjl at lucon dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30040
