https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108027
--- Comment #1 from LIU Hao <lh_mouse at 126 dot com> --- I need some information about this though: When multilib is enabled, does GCC still link programs with `-lmsvcrt`? There seems to be only reference to msvcrt: gcc/config/i386/mingw32.h:187: -lmoldname -lmingwex -lmsvcrt -lkernel32 " MCFGTHREAD_SPEC which is followed by `MCFGTHREAD_SPEC`. If GCC links against libmcfgthread in both m32 and m64, then I suspect there is only one issue: You forgot to install mcfgthread. I don't know whether libtool has builtin macros for multilib builds; by default libraries are installed into `<prefix>/lib` and you have to copy them into `<prefix>/lib32` and `<prefix>/lib64`, respectively.
