[MacPorts] #39791: libstdcxx 4.8.1 fails to build on PPC Tiger because of undefined symbols

[MacPorts]

#39791: libstdcxx 4.8.1 fails to build on PPC Tiger because of undefined symbols
------------------------------+-----------------------------
  Reporter:  Peter_Dyballa@…  |      Owner:  mww@…
      Type:  defect           |     Status:  new
  Priority:  Normal           |  Milestone:
 Component:  ports            |    Version:  2.2.99
Resolution:                   |   Keywords:  ppc ppc64 tiger
      Port:  libstdcxx        |
------------------------------+-----------------------------

Comment (by Peter_Dyballa@…):

 Replying to [comment:2 egall@…]:
 > OP, what does `port installed libunwind-headers` return for you?
 I made an experiment and removed these header files. The build fails with
 exactly the same error:

 {{{
 /opt/local/bin/g++-apple-4.2 -arch ppc   -pipe -Os -DIN_GCC   -fno-
 exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wwrite-strings
 -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-
 variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -L/opt/local/lib
 -Wl,-headerpad_max_install_names -o cc1 c/c-lang.o c-family/stub-objc.o
 attribs.o c/c-errors.o c/c-decl.o c/c-typeck.o c/c-convert.o c/c-aux-
 info.o c/c-objc-common.o c/c-parser.o c-family/c-common.o
 c-family/c-cppbuiltin.o c-family/c-dump.o c-family/c-format.o
 c-family/c-gimplify.o c-family/c-lex.o c-family/c-omp.o c-family/c-opts.o
 c-family/c-pch.o c-family/c-ppoutput.o c-family/c-pragma.o c-family/c
 -pretty-print.o c-family/c-semantics.o c-family/c-ada-spec.o tree-
 mudflap.o darwin-c.o rs6000-c.o \
   cc1-checksum.o libbackend.a main.o  libcommon-target.a libcommon.a
 ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a libcommon.a
 ../libcpp/libcpp.a  -liconv ../libbacktrace/.libs/libbacktrace.a
 ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a  -L/opt/local/lib
 -lcloog-isl  -lisl -L/opt/local/lib -L/opt/local/lib -L/opt/local/lib
 -lmpc -lmpfr -lgmp   -lz
 ld: warning: object file compiled with -mlong-branch which is no longer
 needed. To remove this warning, recompile without -mlong-branch:
 /usr/lib/crt1.o
 ld: warning: object file compiled with -mlong-branch which is no longer
 needed. To remove this warning, recompile without -mlong-branch:
 /opt/local/lib/apple-gcc42/gcc/powerpc-apple-darwin8/4.2.1/crt3.o
 Undefined symbols:
   "__Unwind_GetIPInfo", referenced from:
       _unwind in libbacktrace.a(backtrace.o)
 ld: symbol(s) not found
 }}}

 I also made a comparison of the two main.log files – there are no real
 differences, just dates.

 The documentation of libbacktrace states:

 {{{
 As of September 2012, libbacktrace only supports ELF executables with
 DWARF debugging information.  The library is written to make it
 straightforward to add support for other object file and debugging
 formats.
 }}}

 In Mac OS X DWARF2 is used and ELF executables are not used – what is
 libbacktrace then good for?

-- 
Ticket URL: <https://trac.macports.org/ticket/39791#comment:5>
MacPorts <http://www.macports.org/>
Ports system for OS X