[MacPorts] #37845: gcc48: multilib support (was: multilib support in gcc48)

[MacPorts]

#37845: gcc48: multilib support
----------------------+-------------------
  Reporter:  barto@…  |      Owner:  mww@…
      Type:  defect   |     Status:  new
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.1.2
Resolution:           |   Keywords:
      Port:  gcc48    |
----------------------+-------------------
Changes (by ryandesign@…):

 * owner:  macports-tickets@… => mww@…
 * keywords:  gcc =>
 * port:   => gcc48


Old description:

> I'm trying to compile code that must interact with a 3rd party 32 bit
> library, and I can't link it because -m32 is not supported in the latest
> gcc48 compiler.
> http://www.spinics.net/lists/gcchelp/msg36767.html indicates that when
> compiling and the error about 128 bit support appears it is due to not
> enabling multilib. Checking the specs on gcc48 shows:
> nomultidefs
> and multilib is empty for all instances
>
> *multilib:
> . ;
> *multilib_defaults:
> *multilib_extra:
> *multilib_matches:
> *multilib_exclusions:
> *multilib_options:
> *multilib_reuse:
>
> When linking for 32 bits I get the following error:
>
> linking libmvpgemcomm32.so.7.0.0
> ld: warning: ignoring file /opt/local/lib/gcc48/libstdc++.dylib, file was
> built for unsupported file format ( 0xcf 0xfa 0xed 0xfe 0x 7 0x 0 0x 0 0x
> 1 0x 3 0x 0 0x 0 0x 0 0x 6 0x 0 0x 0 0x 0 ) which is not the architecture
> being linked (i386): /opt/local/lib/gcc48/libstdc++.dylib
>
> The code I'm using requires (now) the gcc std=c++11 code (mutex,
> condition_variable, futures, etc) so I can't use the older clang
> compiler.
> Any suggestions on getting 32 bit support built into gcc48 from macports?

New description:

 I'm trying to compile code that must interact with a 3rd party 32 bit
 library, and I can't link it because -m32 is not supported in the latest
 gcc48 compiler.
 http://www.spinics.net/lists/gcchelp/msg36767.html indicates that when
 compiling and the error about 128 bit support appears it is due to not
 enabling multilib. Checking the specs on gcc48 shows:
 {{{
 nomultidefs
 }}}
 and multilib is empty for all instances

 {{{
 *multilib:
 . ;
 *multilib_defaults:
 *multilib_extra:
 *multilib_matches:
 *multilib_exclusions:
 *multilib_options:
 *multilib_reuse:
 }}}

 When linking for 32 bits I get the following error:

 {{{
 linking libmvpgemcomm32.so.7.0.0
 ld: warning: ignoring file /opt/local/lib/gcc48/libstdc++.dylib, file was
 built for unsupported file format ( 0xcf 0xfa 0xed 0xfe 0x 7 0x 0 0x 0 0x
 1 0x 3 0x 0 0x 0 0x 0 0x 6 0x 0 0x 0 0x 0 ) which is not the architecture
 being linked (i386): /opt/local/lib/gcc48/libstdc++.dylib
 }}}

 The code I'm using requires (now) the gcc std=c++11 code (mutex,
 condition_variable, futures, etc) so I can't use the older clang compiler.
 Any suggestions on getting 32 bit support built into gcc48 from macports?

--

-- 
Ticket URL: <https://trac.macports.org/ticket/37845#comment:1>
MacPorts <http://www.macports.org/>
Ports system for Mac OS