I have installed Cygwin with GCC 11.3, but I recognized that I need to downgrade GCC to 4.7.2. The gmp-5.0.5, mpfr-3.1.1 and mpc-1.0.1 were successfully installed, but when I installed the gcc-4.7.2, the error occurred:
...
checking whether madvise is declared... yes
checking for struct tms... yes
checking for clock_t... yes
checking for F_SETLKW... yes
checking if mkdir takes one argument... no
*** Configuration x86_64-unknown-cygwin not supported
make[2]: *** [Makefile:3896: configure-stage1-gcc] Error 1
make[2]: Leaving directory '/home/username/gcc-4.7.2-obj/gcc-4.7.2-build'
make[1]: *** [Makefile:15763: stage1-bubble] Error 2
make[1]: Leaving directory '/home/username/gcc-4.7.2-obj/gcc-4.7.2-build'
make: *** [Makefile:898: all] Error 2
Any hint on this? and how should it be done instead? Thanks in advance