[MacPorts] #57473: qt4-mac @4.8.7: configure not detecting arch properly

[MacPorts]

#57473: qt4-mac @4.8.7: configure not detecting arch properly
---------------------------+--------------------
  Reporter:  SerpentChris  |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.5.4
Resolution:                |   Keywords:
      Port:  qt4-mac       |
---------------------------+--------------------
Description changed by SerpentChris:

Old description:

> My macports.conf has build arch set to ppc64, and my OS is Mac OS X
> 10.5.8. At some point during a configure script, things like this start
> to get printed out a lot, and eventually the build fails.
>

> {{{
> :info:configure WARNING: Expect ARCH of '-arch ARCH' flag to be exact;
> got 'ppc64'; ignoring extra.
> :info:configure /usr/bin/g++-4.2 -c -pipe -isysroot
> /Developer/SDKs/MacOSX10.5.sdk -arch ppc64 -O2 -Wall -W
> -I../../../mkspecs/macx-g++ -I. -o iconv.o iconv.cpp
> :info:configure /usr/bin/g++-4.2 -headerpad_max_install_names -o iconv
> iconv.o     -Wl,-syslibroot,/Developer/SDKs/MacOSX10.5.sdk -arch ppc
> -liconv
> }}}
>
> It looks like the ppc64 flag is disliked for some reason.

New description:

 My macports.conf has build arch set to ppc64, and my OS is Mac OS X
 10.5.8. At some point during a configure script, things like this start to
 get printed out a lot, and eventually the build fails.


 {{{
 :info:configure WARNING: Expect ARCH of '-arch ARCH' flag to be exact; got
 'ppc64'; ignoring extra.
 :info:configure /usr/bin/g++-4.2 -c -pipe -isysroot
 /Developer/SDKs/MacOSX10.5.sdk -arch ppc64 -O2 -Wall -W
 -I../../../mkspecs/macx-g++ -I. -o iconv.o iconv.cpp
 :info:configure /usr/bin/g++-4.2 -headerpad_max_install_names -o iconv
 iconv.o     -Wl,-syslibroot,/Developer/SDKs/MacOSX10.5.sdk -arch ppc
 -liconv
 }}}

 It looks like the '-arch ppc64' flag is disliked and inconsistently
 applied.

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Ticket URL: <https://trac.macports.org/ticket/57473#comment:1>
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