[Bug 690460] Re: Does not identify -march=native correctly [regression from gcc-4.4]

[Dmitrijs Ledkovs]

tdlk at surgut:~$ lsb_release -c
Codename:	oneiric
tdlk at surgut:~$ for i in 4 5 6; do gcc-4.$i -march=native -E -v -</dev/null 2>&1 | grep cc1; done;
 /usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.4.6/cc1 -E -quiet -v - -D_FORTIFY_SOURCE=2 -march=prescott --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=generic -fstack-protector
 /usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.5.3/cc1 -E -quiet -v - -D_FORTIFY_SOURCE=2 -march=pentium-m --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=generic -fstack-protector
 /usr/lib/i386-linux-gnu/gcc/i686-linux-gnu/4.6.1/cc1 -E -quiet -v - -march=pentium-m -mno-cx16 -mno-sahf -mno-movbe -mno-aes -mno-pclmul -mno-popcnt -mno-abm -mno-lwp -mno-fma -mno-fma4 -mno-xop -mno-bmi -mno-tbm -mno-avx -mno-sse4.2 -mno-sse4.1 --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=generic -fstack-protector

oneiric
4.4 pass
4.5 fail
4.6 fail

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https://bugs.launchpad.net/bugs/690460

Title:
  Does not identify -march=native correctly [regression from gcc-4.4]

Status in “gcc-4.5” package in Ubuntu:
  New

Bug description:
  Binary package hint: gcc-4.5

  $ gcc-4.4 -march=native -E -v -</dev/null 2>&1 | grep cc1
   /usr/lib/gcc/i686-linux-gnu/4.4.5/cc1 -E -quiet -v - -D_FORTIFY_SOURCE=2 -march=prescott --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=generic -fstack-protector

  $ gcc-4.5 -march=native -E -v -</dev/null 2>&1 | grep cc1
   /usr/lib/gcc/i686-linux-gnu/4.5.2/cc1 -E -quiet -v - -D_FORTIFY_SOURCE=2 -march=pentium-m --param l1-cache-size=32 --param l1-cache-line-size=64 --param l2-cache-size=2048 -mtune=generic -fstack-protector

  
  I have Intel Core Due processor which is suppose to be detected as prescott. Gcc-4.4 does it correctly.

  Versions:
  gcc-4.4	4.4.5-7ubuntu1
  gcc-4.5	4.5.1-12ubuntu1

  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: gcc-4.5 4.5.1-12ubuntu1
  ProcVersionSignature: Ubuntu 2.6.37-9.22-generic 2.6.37-rc5
  Uname: Linux 2.6.37-9-generic i686
  Architecture: i386
  Date: Wed Dec 15 01:37:38 2010
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_GB.utf8
   SHELL=/bin/bash
  SourcePackage: gcc-4.5

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