[Bug lto/49992] lto-bootstrap reveals duplicate symbols on x86_64-apple-darwin11

["howarth at nitro dot med.uc.edu" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49992

--- Comment #36 from Jack Howarth <howarth at nitro dot med.uc.edu> 2011-08-10 23:22:57 UTC ---
Still broken at r177628 with
http://gcc.gnu.org/ml/gcc-bugs/2011-08/msg00935.html and...

 ../gcc-4.7-20110810/configure --prefix=/sw --prefix=/sw/lib/gcc4.7
--mandir=/sw/share/man --infodir=/sw/lib/gcc4.7/info
--with-build-config=bootstrap-lto --enable-stage1-languages=c,lto
--enable-languages=c,c++,fortran,lto,objc,obj-c++,java --with-gmp=/sw
--with-libiconv-prefix=/sw --with-ppl=/sw --with-cloog=/sw --with-mpc=/sw
--with-system-zlib --x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib
--program-suffix=-fsf-4.7 --enable-checking=yes --enable-cloog-backend=isl

...at..

/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/./prev-gcc/g++
-B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/./prev-gcc/
-B/sw/lib/gcc4.7/x86_64-apple-darwin11.0.0/bin/ -nostdinc++
-B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/prev-x86_64-apple-darwin11.0.0/libstdc++-v3/src/.libs
-B/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/prev-x86_64-apple-darwin11.0.0/libstdc++-v3/libsupc++/.libs
-I/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/prev-x86_64-apple-darwin11.0.0/libstdc++-v3/include/x86_64-apple-darwin11.0.0
-I/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/prev-x86_64-apple-darwin11.0.0/libstdc++-v3/include
-I/sw/src/fink.build/gcc47-4.7.0-1/gcc-4.7-20110810/libstdc++-v3/libsupc++
-L/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/prev-x86_64-apple-darwin11.0.0/libstdc++-v3/src/.libs
-L/sw/src/fink.build/gcc47-4.7.0-1/darwin_objdir/prev-x86_64-apple-darwin11.0.0/libstdc++-v3/libsupc++/.libs
 -g -O2 -mdynamic-no-pic -flto=jobserver -frandom-seed=1 -DIN_GCC   -W -Wall
-Wwrite-strings -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -Werror -fno-common 
-DHAVE_CONFIG_H -static-libstdc++ -static-libgcc -Wl,-no_pie -o gengtype \
        gengtype.o gengtype-lex.o gengtype-parse.o gengtype-state.o version.o
errors.o libcommon.a ../libcpp/libcpp.a ../libiberty/libiberty.a
../libdecnumber/libdecnumber.a libcommon.a ../libcpp/libcpp.a -lintl -L/sw/lib
-liconv  ../libiberty/libiberty.a ../libdecnumber/libdecnumber.a 
ld: duplicate symbol trim_filename(char const*) in libcommon.a(diagnostic.o)
and errors.o for architecture x86_64

Again, I don't understand your resistance to weaning darwin9+ off of 'ranlib
-c' in light of the darwin linker developer's confirmation that the use of 
ranlib '-c' is discouraged on darwin. Considering that it was added in
prehistoric times (gcc 3.3), there appears to be no rational need to retain its
usage.