List specific build requirements + improve installation guide
I am struggling to get this extension to build on windows with CygWin. Managed to work through a few initial errors and the first build step looks to be working but the next one is struggling with boost_python. What is the boost_python version I should be using? What point of entry should I pass to the build script? I was modifying the library_path's and the include_path's a bunch of different ways. ``` g++ -shared -Wl,--enable-auto-image-base build/temp.cygwin-3.1.7-x86_64-3.6/fourmy/_fourmy.o -LC:/cygwin64/home/12504/vcpkg/installed/x86-windows/lib -L/usr/lib/python3.6/config -L/usr/lib -lgmp -lmpfr -lboost_python-py36 -lpython3.6m -o build/lib.cygwin-3.1.7-x86_64-3.6/fourmy/_fourmy.cpython-36m-x86_64-cygwin.dll /usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lgmp /usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible C:/cygwin64/home/12504/vcpkg/installed/x86-windows/lib/mpfr.lib when searching for -lmpfr /usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible C:/cygwin64/home/12504/vcpkg/installed/x86-windows/lib/mpfr.lib when searching for -lmpfr /usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: skipping incompatible C:/cygwin64/home/12504/vcpkg/installed/x86-windows/lib/mpfr.lib when searching for -lmpfr /usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lmpfr /usr/lib/gcc/x86_64-pc-cygwin/9.3.0/../../../../x86_64-pc-cygwin/bin/ld: cannot find -lboost_python-py36 ``` I have installed all the packages with vcpkg, and I'm managing to find the package locations in various places under the vcpkg directory, like `packages`, `installed`, `buildtrees` but none of these entry points work for input to the build. All say skipping incompatible or cannot find. Any help figuring out specific versions I need to build or what entry point for these packages I need to pass in?
issue