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Date: Sat, 25 Feb 2006 14:00:00 -0000
Subject: [Bug driver/26466]  New: multilib selection in gcc driver ignores removal of switches
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From: "peb at mppmu dot mpg dot de" <gcc-bugzilla@gcc.gnu.org>
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I was trying to build a "x86_32-linux-gnu" version of gcc (the same as a
x86_64-linux-gnu version, except that the compiler default mode and its
binaries are 32-bit ones).

The essential ingredient was a DRIVER_SELF_SPECS "%{!m32:%{!m64:-m32}}",
%{m32:%<m64}", such that 'gcc -m64 -m32' produces 32-bit binaries.
More details are described in:
    ftp://ftpth.mppmu.mpg.de/pub/peb/x86-32/toolchain.ps

It turned out that everything worked fine, except the multilib selection wich
ignored that the switch "m64" was removed by the DRIVER_SELF_SPECS.

This problem was fixed by the attached patch.


-- 
           Summary: multilib selection in gcc driver ignores removal of
                    switches
           Product: gcc
           Version: 3.4.5
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: peb at mppmu dot mpg dot de
 GCC build triplet: i686-linux-gnu
  GCC host triplet: i686-linux-gnu
GCC target triplet: i686-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26466