Remove ldns from optional dependencies, add note about macOS cross-co…

…mpile

README.md

@@ -72,14 +72,14 @@ Ubuntu/Debian:
 
 Required:  `sudo apt-get install -y build-essential cmake pkg-config libboost-all-dev libssl-dev libsodium-dev libunwind-dev binutils-dev rapidjson-dev`
 
-Optional:  `sudo apt-get install -y liblzma-dev libldns-dev libexpat1-dev libgtest-dev libreadline-dev`
+Optional:  `sudo apt-get install -y liblzma-dev libexpat1-dev libgtest-dev libreadline-dev`
 
 
 **Arch Linux:**
 
 Required:  `sudo pacman -S base-devel cmake boost openssl libsodium libunwind binutils-devel rapidjson-devel`
 
-Optional:  `sudo pacman -S xz ldns expat gtest readline`
+Optional:  `sudo pacman -S xz expat gtest readline`
 
 
 
@@ -90,6 +90,7 @@ To compile for Linux (distro-agnostic): `make release-cross-linux-x86_64`
 To compile for Windows(mingw64): `make release-cross-winx64`
 
 To compile for Mac(x86_64): `make release-cross-mac-x86_64`
+*Please note: the mac cross-compilation does not function properly.  Additional steps may be required.  As a result, our binaries are compiled for macOS on a macOS host.*
 
 The `Makefile` entries run by the above commands will build dependencies for `x86_64-gnu-linux` and `x86_64-w64-mingw32` hosts, respectively. If you would like to compile for a different type of host platform, `cd` into the `contrib/depends` directory, and build with `make HOST=xxx-yyy-zzz` where xxx-yyy-zzz is a <a href="https://wiki.osdev.org/Target_Triplet">standard host triplet</a>.