#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