https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69284
--- Comment #1 from Daniel Starke <daniel.f.starke at freenet dot de> --- I have tried a couple of things to find the cause of this bug. - using -O1 instead of -O3 when building GCC - using -O2 instead of -O3 when building GCC - using -fno-lto when building GCC - using the defaults compile/link flags when building GCC - removing the -mtune=core2 -march=core2 arguments from the compile/link flags - configuring GCC with --enable-threads=win32 instead of --enable-threads=posix Neither worked. And I noticed, that the resulting 32-bit libstdc++-6.dll was way smaller than its 64-bit variant. Then I changed from binutils 2.26.51 to 2.25.1 and I got a working libstdc++-6.dll. So I suspect that this is a binutils issue rather than a GCC issue. I will report it to the binutils bug tracker later on. This bug can be closed in my opinion.
