[MacPorts] #60348: libcxx fails to install on Leopard

[MacPorts]

#60348: libcxx fails to install on Leopard
--------------------------+--------------------
 Reporter:  DominusExult  |      Owner:  (none)
     Type:  defect        |     Status:  new
 Priority:  Normal        |  Milestone:
Component:  ports         |    Version:  2.6.2
 Keywords:                |       Port:  libcxx
--------------------------+--------------------
 I followed the instructions of installing libcxx, first by completely
 reinstalling macports, then ran selfupdate, then applying the Leopard SDK
 fixes.
 Finally "sudo port install libcxx".
 All the dependencies installed but libcxx failed with:
 {{{
 :info:build + for FILE in '../src/*.cpp'
 :info:build + /usr/bin/g++-4.2 -c -g -O3 -arch i386 -arch ppc
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_libcxx/libcxx/work/libcxxabi-5.0.1.src/include
 -I/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_libcxx/libcxx/work/libcxx-5.0.1.src/include
 -Os -std=c++11 -stdlib=libc++ -nostdinc++ -fstrict-aliasing -Wstrict-
 aliasing=2 -Wsign-conversion -Wshadow -Wconversion -Wunused-variable
 -Wmissing-field-initializers -Wchar-subscripts -Wmismatched-tags
 -Wmissing-braces -Wshorten-64-to-32 -Wsign-compare -Wstrict-aliasing=2
 -Wstrict-overflow=4 -Wunused-parameter -Wnewline-eof
 -D_LIBCPP_BUILDING_LIBRARY -I../include ../src/abort_message.cpp
 :info:build cc1plus: error: unrecognized command line option "-Wsign-
 conversion"
 :info:build cc1plus: error: unrecognized command line option
 "-Wmismatched-tags"
 :info:build cc1plus: error: unrecognized command line option "-std=c++11"
 :info:build cc1plus: error: unrecognized command line option
 "-stdlib=libc++"
 :info:build cc1plus: error: unrecognized command line option "-Wsign-
 conversion"
 :info:build cc1plus: error: unrecognized command line option
 "-Wmismatched-tags"
 :info:build cc1plus: error: unrecognized command line option "-std=c++11"
 :info:build cc1plus: error: unrecognized command line option
 "-stdlib=libc++"
 :info:build lipo: can't figure out the architecture type of:
 /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_lang_libcxx/libcxx/work/.tmp/ccj8UMSX.out
 :info:build make: ***
 }}}

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Ticket URL: <https://trac.macports.org/ticket/60348>
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