Gnu gcc-6.2.0. Make install-gcc failed.

[Marcin Noga <marcin_noga at procard dot pl>]

Hello.
I just starting their adventure with the GNU GCC.
Successfully compiled binutils and gcc 6.2.0 for FR30-elf target.
In an environment Msys2 under Windows 10.
Configuration binutils:

../../src/binutils-2.27/configure --target=FR30-elf
prefix=/c/mingw/FR30-elf --disable-nls

Configuring gcc 6.2.0:

../../src/gcc-6.2.0/configure --target=FR30-elf prefix=/c/mingw/FR30-elf
--enable-languages​=c,c++ --disable-nls -disable-shared --with-newlib
--with-headers=../../src/newlib-2.4.0.20160923/newlib/libc/include

I have a problem with installing gcc.
Make install or make install-gcc returns an error:
...
/d/Devel/Fujitsu_FR30.80/gcc_6.2/src/gcc-6.2.0/install-sh: line 437:
exec: cp: can not execute: Is a directory
make [2]: *** [Makefile: 3617: install-mkheaders] Error 1
make [2]: Leaving directory
'/d/Devel/Fujitsu_FR30.80/gcc_6.2/build/gcc-6.2.0/gcc'
make [1]: *** [Makefile: 4206: gcc-install] Error 2
make [1]: Leaving directory
'/d/Devel/Fujitsu_FR30.80/gcc_6.2/build/gcc-6.2.0'
make: *** [Makefile: 2294: install] Error 2

What am I doing wrong?
Can anyone help?
In Annex I posted the files config.log, make_install-gcc.log.txt,
install-sh.

Regards,
Marcin.

Attachment: install-sh
Description: Text document

Attachment: config.log
Description: Text document

Attachment: make_install-gcc.log.txt
Description: Text document