Description of problem:
When I try to rebuild mingw-gcc-6.1.0-1.fc24.src.rpm with
mingw32-binutils-2.26-1.fc24.x86_64 installed, the C++ runtime library built (libstdc++-6.dll) does not properly work. If I run a program using the libglibmm-2.4-1.dll, it crashes when run with libstdc++-6.dll built with binutils 2.26.

C:\Program Files (x86)\XX\bin>gdb.exe yy.exe
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Reading symbols from hex2vec.exe...Reading symbols from C:\Program Files (x86)\XX\bin\yy.exe.debug...
warning: section .gnu_debuglink not found in C:\Program Files (x86)\XX\bin\yy.exe.debug
done.
done.
(gdb) run
Starting program: C:\Program Files (x86)\XX\bin\yy.exe
[New Thread 3268.0x19d0]
warning: section .gnu_debuglink not found in C:\Program Files (x86)\XX\bin\libglibmm-2.4-1.dll.debug

Program received signal SIGSEGV, Segmentation fault.
0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
#1  0x666f1cad in __static_initialization_and_destruction_0 (
    __priority=65535, __initialize_p=1)
    at /usr/i686-w64-mingw32/sys-root/mingw/include/c++/iostream:74
#2  _GLOBAL__sub_I__ZN4Glib29get_unichar_from_std_iteratorEN9__gnu_cxx17__normal
_iteratorIPKcNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEEEE ()
    at ../../../glib/glibmm/ustring.cc:1507
#3  0x666ee1dc in __do_global_ctors ()
   from C:\Program Files (x86)\XX\bin\libglibmm-2.4-1.dll
#4  0x00000002 in ?? ()
#5  0x0028fd24 in ?? ()
Backtrace stopped: previous frame inner to this frame (corrupt stack?)
(gdb)

If I install binutils 2.25 as was used when building mingw-gcc in the f24 distribution (mingw32-binutils-2.25-3.fc24.x86_64), the libstdc++-6.dll built that way works.

There are rather strange differences in the two libstdc++-6.dlls, the one compiled with 2.26 has less than half the amount of initialized and uninitialized data. I'm attaching the diff -u of the output of objdump -x of the two DLLs.

Version-Release number of selected component (if applicable):
mingw32-binutils-2.26-1.fc24.x86_64

How reproducible:
always

Steps to Reproduce:
1.rpmbuild --rebuild mingw-gcc-6.1.0-1.fc24.src.rpm
2.install newly built RPMs
3.run a program that uses  libglibmm-2.4-1.dll

Actual results:
Wine: runtime linker failure binding __ZNSt8ios_baseC1Ev std::ios_base::ios_base()
Windows: segmentation fault trying to call std::ios_base::ios_base()

Expected results:
Program works