Core2 CPU not detected correctly

This is a HEAD build on a Core2 Duo (i386 & x86_64) MacBook Pro.

Configure Command: ./configure --host=x86_64-apple-darwin --target=x86_64-apple-darwin

Configure Summary:

Configure completed successfully.

   Building GHC version  : 7.1.20110131

   Build platform        : i386-apple-darwin
   Host platform         : x86_64-apple-darwin
   Target platform       : x86_64-apple-darwin

   Bootstrapping using   : /usr/bin/ghc
      which is version   : 6.12.3

   Using GCC             : /usr/bin/gcc
      which is version   : 4.2.1

   ld       : /usr/bin/ld
   Happy    : /usr/local/bin/happy (1.18.5)
   Alex     : /usr/local/bin/alex (2.3.3)
   Python   : /usr/bin/python
   Perl     : /usr/bin/perl
   dblatex  : /usr/local/bin/dblatex
   xsltproc : /usr/bin/xsltproc
   HsColour : /Users/wknop/.cabal/bin/HsColour

   Building DocBook HTML documentation : YES
   Building DocBook PS documentation   : YES
   Building DocBook PDF documentation  : YES

Build fails with:

compiler/stage2/build/LibFFI_hsc_make.c:1: error: CPU you selected does not support x86-64 instruction set

Workaround: Adding -march=core2 to the x86_64-apple-darwin section of aclocal.m4 convinces the compiler that the processor supports i386 and x86_64.

Trac metadata

Trac field	Value
Version	7.1
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	Unresolved
Component	Compiler
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system	Unknown/Multiple
Architecture