binutils 2.34
gcc 6.5 (gmp 6.2.1, mpfr 4.1.0-p11, mpc 1.2.1, isl 0.23)
mingw-w64 [c6e13e] 20210407
gdb 10.1
make 4.2.1
zlib 1.2.11

build script [r421] + '--disable-shared --enable-fully-dynamic-string' https://sourceforge.net/projects/mingw-w64-dgn/
