[MacPorts] #35609: gcc @4.7.1 Fails compiling with -m32 on 64-bit system

[MacPorts]

#35609: gcc @4.7.1 Fails compiling with -m32 on 64-bit system
-------------------------------+--------------------------------------------
 Reporter:  fh@…               |       Owner:  macports-tickets@…                   
     Type:  defect             |      Status:  new                                  
 Priority:  Normal             |   Milestone:                                       
Component:  ports              |     Version:  2.1.2                                
 Keywords:  gcc, -m32, 64-bit  |        Port:  gcc47                                
-------------------------------+--------------------------------------------
 Hi,

 gcc 4.7.1 fails to compile the following program with flag -m32 on 64-bit
 system.

 {{{
 #include <limits>
 #include <iostream>
 using namespace std;
 int main()
 {
         cout << numeric_limits<int>::has_infinity << endl;
         return 0;
 }
 }}}

 The same problem has been discussed for Arch linux here:
 http://comments.gmane.org/gmane.comp.gcc.help/41605 If I understand well
 this is a problem of how gcc is built and packaged and not a problem of
 gcc itself.

 The output of "g++-mp-4.7 -m32 -v foo.cc" shows that some path is not set
 properly (see attachment):

 {{{
 ignoring nonexistent directory "/opt/macports/lib/gcc47/gcc/x86_64-apple-
 darwin10/4.7.1/../../../../../x86_64-apple-darwin10/include"
 }}}

 I am running Mac OS 10.6.8 on an Intel Core 2 Duo. I have macports 2.1.2.

-- 
Ticket URL: <https://trac.macports.org/ticket/35609>
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