[Bug gold/19751] New: Gold failed to build with GCC 6

[hjl.tools at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19751

            Bug ID: 19751
           Summary: Gold failed to build with GCC 6
           Product: binutils
           Version: 2.27 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gold
          Assignee: ccoutant at gmail dot com
          Reporter: hjl.tools at gmail dot com
                CC: ian at airs dot com
  Target Milestone: ---

/export/build/gnu/gcc-x32/release/usr/gcc-6.0.0-x32/bin/g++ -DHAVE_CONFIG_H -I.
-I/export/gnu/import/git/sources/binutils-gdb/gold 
-I/export/gnu/import/git/sources/binutils-gdb/gold
-I/export/gnu/import/git/sources/binutils-gdb/gold/../include
-I/export/gnu/import/git/sources/binutils-gdb/gold/../elfcpp
-DLOCALEDIR="\"/usr/local/share/locale\"" -DBINDIR="\"/usr/local/bin\""
-DTOOLBINDIR="\"/usr/local/x86_64-pc-linux-gnu/bin\""
-DTOOLLIBDIR="\"/usr/local/x86_64-pc-linux-gnu/lib\""   -W -Wall    -Werror
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -frandom-seed=dirsearch.o
-I/export/gnu/import/git/sources/binutils-gdb/gold/../zlib -g -O2 -MT
dirsearch.o -MD -MP -MF .deps/dirsearch.Tpo -c -o dirsearch.o
/export/gnu/import/git/sources/binutils-gdb/gold/dirsearch.cc
/export/gnu/import/git/sources/binutils-gdb/gold/dirsearch.cc:125:1: error:
‘{anonymous}::Dir_caches::~Dir_caches()’ defined but not used
[-Werror=unused-function]
 Dir_caches::~Dir_caches()
 ^~~~~~~~~~
cc1plus: all warnings being treated as errors
Makefile:853: recipe for target 'dirsearch.o' failed
make: *** [dirsearch.o] Error 1

/export/build/gnu/gcc-x32/release/usr/gcc-6.0.0-x32/bin/g++ -DHAVE_CONFIG_H -I.
-I/export/gnu/import/git/sources/binutils-gdb/gold 
-I/export/gnu/import/git/sources/binutils-gdb/gold
-I/export/gnu/import/git/sources/binutils-gdb/gold/../include
-I/export/gnu/import/git/sources/binutils-gdb/gold/../elfcpp
-DLOCALEDIR="\"/usr/local/share/locale\"" -DBINDIR="\"/usr/local/bin\""
-DTOOLBINDIR="\"/usr/local/x86_64-pc-linux-gnu/bin\""
-DTOOLLIBDIR="\"/usr/local/x86_64-pc-linux-gnu/lib\""   -W -Wall    -Werror
-D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -frandom-seed=arm.o
-I/export/gnu/import/git/sources/binutils-gdb/gold/../zlib -g -O2 -MT arm.o -MD
-MP -MF .deps/arm.Tpo -c -o arm.o
/export/gnu/import/git/sources/binutils-gdb/gold/arm.cc
/export/gnu/import/git/sources/binutils-gdb/gold/arm.cc:4527:1: error:
‘std::__cxx11::string {anonymous}::Reloc_stub::Key::name() const’ defined but
not used [-Werror=unused-function]
 Reloc_stub::Key::name() const
 ^~~~~~~~~~

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