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Re: gcc 4.7.4 lto build failure


On 2014.09.19 at 14:55 +0200, Markus Trippelsdorf wrote:
> On 2014.09.19 at 13:15 +0100, Rogelio Serrano wrote:
> > /home/rogelio/gcc-build/./prev-gcc/g++
> > -B/home/rogelio/gcc-build/./prev-gcc/ -B/x86_64-unknown-linux-gnu/bin/
> > -nostdinc++ -B/home/rogelio/gcc-build/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
> > -B/home/rogelio/gcc-build/prev-x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
> > -I/home/rogelio/gcc-build/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include/x86_64-unknown-linux-gnu
> > -I/home/rogelio/gcc-build/prev-x86_64-unknown-linux-gnu/libstdc++-v3/include
> > -I/home/rogelio/gcc-4.7.4/libstdc++-v3/libsupc++
> > -L/home/rogelio/gcc-build/prev-x86_64-unknown-linux-gnu/libstdc++-v3/src/.libs
> > -L/home/rogelio/gcc-build/prev-x86_64-unknown-linux-gnu/libstdc++-v3/libsupc++/.libs
> >   -g -O2 -flto=jobserver -frandom-seed=1 -fprofile-use -DIN_GCC
> > -fno-exceptions -fno-rtti -W -Wall -Wno-narrowing -Wwrite-strings
> > -Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long
> > -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H
> > -static-libstdc++ -static-libgcc  -o cc1 c-lang.o c-family/stub-objc.o
> > attribs.o c-errors.o c-decl.o c-typeck.o c-convert.o c-aux-info.o
> > c-objc-common.o c-parser.o tree-mudflap.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 i386-c.o default-c.o \
> >   cc1-checksum.o main.o  libbackend.a libcommon-target.a libcommon.a
> > ../libcpp/libcpp.a ../libdecnumber/libdecnumber.a libcommon.a
> > ../libcpp/libcpp.a   ../libiberty/libiberty.a
> > ../libdecnumber/libdecnumber.a    -lmpc -lmpfr -lgmp -rdynamic -ldl
> > -lz
> > c-family/c-format.o (symbol from plugin): warning: memset used with
> > constant zero length parameter; this could be due to transposed
> > parameters
> > collect2: error: ld returned 1 exit status
> > 
> > 
> > Any pointers how to debug this?
> > 
> > I configured with:
> > 
> > ../gcc-4.7.4/configure --prefix= --libexecdir=/lib --enable-shared
> > --enable-threads=posix --enable-__cxa_atexit --enable-clocale
> > --enable-languages=c,lto --disable-multilib --with-system-zlib
> > --enable-lto --with-build-config=bootstrap-lto
> > 
> > then did a profiledbootstrap make
> 
> When using profiledbootstrap you should add --disable-werror to the
> configuration flags.

Hmm, I think this is actually a linker bug. Could you try gold? See:
https://sourceware.org/bugzilla/show_bug.cgi?id=16746

-- 
Markus


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