[Bug 973240] Re: libstdc++-dev:i386 cannot be installed on 64bit system.

[Matthias Klose]

fixed for gcc-4.7 in raring, won't fix for gcc-4.6


** Also affects: gcc-4.7 (Ubuntu)
   Importance: Undecided
       Status: New

** Changed in: gcc-4.7 (Ubuntu)
       Status: New => Fix Released

** Changed in: gcc-4.6 (Ubuntu)
       Status: Confirmed => Won't Fix

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Title:
  libstdc++-dev:i386 cannot be installed on 64bit system.

Status in “gcc-4.6” package in Ubuntu:
  Won't Fix
Status in “gcc-4.7” package in Ubuntu:
  Fix Released

Bug description:
  lsb_release -rd
  Description:	Ubuntu precise (development branch)
  Release:	12.04
  uname -a
  Linux inspiron1521 3.2.0-21-generic #34-Ubuntu SMP Fri Mar 30 04:25:35 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux

  I don't see why libstdc should try to install g++-4.6:i386
  The 64bit version of gcc has the -m32 option to build 32bit binary output, even though compiling on a 64bit system.
  So, in this case, installing libstdc++6-4.6-dev:i386 should just install the 32 bit lib and nothing else.
  I can see the current multiarch allowing for 64bit and 32bit library files having the same filename, but I cannot see how you can have a 32bit gcc binary installed on a 64bit system, because the location and filename are the same.
  Do we need to introduce /usr/bin and /usr/bin32, similar to /usr/lib32 and /usr/lib?

  
  aptitude install libstdc++6-4.6-dev:i386

  The following NEW packages will be installed:
    binutils:i386{ab} cpp-4.6:i386{ab} g++-4.6:i386{ab} gcc-4.6:i386{ab} libc6-dev:i386{a} libgmp10:i386{a} libgomp1:i386{a} 
    libmpc2:i386{a} libmpfr4:i386{a} libquadmath0:i386{a} libstdc++6-4.6-dev:i386{b} linux-libc-dev:i386{a} 
  0 packages upgraded, 12 newly installed, 0 to remove and 0 not upgraded.
  Need to get 29.1 MB of archives. After unpacking 82.6 MB will be used.
  The following packages have unmet dependencies:
   g++-4.6 : Conflicts: g++-4.6:i386 but 4.6.3-1ubuntu3 is to be installed.
   g++-4.6:i386 : Conflicts: g++-4.6 but 4.6.3-1ubuntu3 is installed.
   gcc-4.6 : Conflicts: gcc-4.6:i386 but 4.6.3-1ubuntu3 is to be installed.
   gcc-4.6:i386 : Conflicts: gcc-4.6 but 4.6.3-1ubuntu3 is installed.
   libstdc++6-4.6-dev : Conflicts: libstdc++6-4.6-dev:i386 but 4.6.3-1ubuntu3 is to be installed.
   libstdc++6-4.6-dev:i386 : Conflicts: libstdc++6-4.6-dev but 4.6.3-1ubuntu3 is installed.
   cpp-4.6 : Conflicts: cpp-4.6:i386 but 4.6.3-1ubuntu3 is to be installed.
   cpp-4.6:i386 : Conflicts: cpp-4.6 but 4.6.3-1ubuntu3 is installed.
   binutils : Conflicts: binutils:i386 but 2.22-6ubuntu1 is to be installed.
   binutils:i386 : Conflicts: binutils but 2.22-6ubuntu1 is installed.

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