PATCH: PR libstdc++/25797: [4.2 Regression] almost all libstdc++ tests fail

[Benjamin Kosnik]

HJ can you send me the relevant parts of config.log with and without
your patch (for afflicted systems.)

Here's what I see:

configure:8221: checking for ld that supports -Wl,--gc-sections
configure:8246: /mnt/hd/bld/gcc/./gcc/xgcc -B/mnt/hd/bld/gcc/./gcc/ -B/mnt/hd/bld/H-x86-gcc/i686-pc-linux-gnu/bin/ -B/mnt/hd/bld/H-x86-gcc/i686-pc-linux-gnu/lib/ -isystem /mnt/hd/bld/H-x86-gcc/i686-pc-linux-gnu/include -isystem /mnt/hd/bld/H-x86-gcc/i686-pc-linux-gnu/sys-include -o conftest -x c++  -Werror -Wl,--gc-sections   conftest.c  >&5
configure:8252: $? = 0
configure:8256: test -z 
			 || test ! -s conftest.err
configure:8259: $? = 0
configure:8262: test -s conftest
configure:8265: $? = 0
configure:8279: result: yes


thanks,
benjamin