Bug#448370: Acknowledgement (gcc-4.2: gcc screws up "-mtune" when "-march=native" is used)

[Miles Bader <miles.bader@necel.com>]

BTW, I just tried the same test-case on a different machine -- and it
seems to work properly there (-march=native results in a correct default
value for -mtune).

The only real difference between the machines is that the previous
machine (where gcc showed the bug) has a pentium3 cpu, whereas the
current machine (where gcc seems to work correctly) has a pentium4.

On this machine:

   $ echo 'float x(float x){return x < 0 ? -x : x;}' > x.c
   $ gcc -fverbose-asm -O2 -mfpmath=sse -march=native -S x.c
   $ grep '\(-march\|-mtune\)' x.s
   # options passed:  -march=pentium4 -mtune=pentium4 -mfpmath=sse -auxbase
   $ head -2 x.s
           .file	"x.c"
   # GNU C version 4.2.3 20071014 (prerelease) (Debian 4.2.2-3) (i486-linux-gnu)

-Miles

-- 
`The suburb is an obsolete and contradictory form of human settlement'