[MacPorts] #36026: gcc46 problem after ld64 upgrade

[MacPorts]

#36026: gcc46 problem after ld64 upgrade
-------------------------+------------------------
  Reporter:  jwhowse4@…  |      Owner:  jeremyhu@…
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.1.2
Resolution:              |   Keywords:
      Port:  ld64        |
-------------------------+------------------------

Comment (by jwhowse4@…):

 As an experiment I created a new MacPorts installation in addition to my
 existing one.  I did this in order to obtain a fresh MacPorts installation
 with no other packages installed.  I then performed the following two
 experiments.

 {{{
 EXPERIMENT #1

 tar xvjf MacPorts-2.1.2.tar.bz2
 cd MacPorts-2.1.2
 setenv PATH /usr/bin:/usr/sbin:/bin:/sbin:/usr/X11/bin:/usr/texbin
 ./configure --prefix=/opt/macports-test --with-applications-dir=/opt
 /macports-test
 make
 make install
 setenv PATH /opt/macports-test/bin:/opt/macports-
 test/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11/bin:/usr/texbin
 port -v selfupdate
 port -v install libffi
 port -v install llvm_select
 port -v install cctools-headers
 port -v install dyld-headers
 port -v install libunwind-headers
 port -v install perl5 +perl5_12
 port -v install llvm-3.1
 port -v install ld64 +llvm31
 }}}

 The linker ld from experiment #1 successfully creates executables for my
 example program using the gcc46 from my original MacPorts installation.  I
 then removed the entire directory macports-test and performed the second
 experiment.

 {{{
 EXPERIMENT #2

 tar xvjf MacPorts-2.1.2.tar.bz2
 cd MacPorts-2.1.2
 setenv PATH /usr/bin:/usr/sbin:/bin:/sbin:/usr/X11/bin:/usr/texbin
 ./configure --prefix=/opt/macports-test --with-applications-dir=/opt
 /macports-test
 make
 make install
 setenv PATH /opt/macports-test/bin:/opt/macports-
 test/sbin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11/bin:/usr/texbin
 port -v selfupdate
 port -v install perl5 +perl5_12
 port -v install libffi
 port -v install llvm_select
 port -v install cctools-headers
 port -v install dyld-headers
 port -v install libunwind-headers
 port -v install llvm-3.1
 port -v install ld64 +llvm31
 }}}

 The linker ld from experiment #2 fails to create executables for my
 example program using the gcc46 from my original MacPorts installation
 with the following familiar error message.

 {{{
 ld: warning: ignoring file test.o, 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 1
 0x 0 0x 0 0x 0 ) which is not the architecture being linked (x86_64):
 test.o
 ld: file is universal (2 slices) but does not contain a(n) x86_64 slice:
 /usr/lib/crt1.10.5.o for architecture x86_64
 collect2: ld returned 1 exit status
 }}}

 I have no idea why this seemingly minor change in the order in which
 packages are installed changes the outcome, but I have attached the
 linkers generated by these two experiments in the hope that they will be
 useful.  If you need any other information, please let me know.

-- 
Ticket URL: <https://trac.macports.org/ticket/36026#comment:48>
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