Improve MSVC cmake and update vcpkg instruction (#10407)

Remove unnecessary compiler flag for clang-cl
Update vcpkg instruction in README.md

1 files changed, 3 insertions, 2 deletions

diff --git a/README.md b/README.md
index 6a3c11f40..a06c3e257 100644
--- a/README.md
+++ b/README.md
@@ -314,13 +314,14 @@ It is highly recommended to use vcpkg as package manager.
 
 After you successfully built vcpkg you can easily install the required libraries:
 ```powershell
-vcpkg install irrlicht zlib curl[winssl] openal-soft libvorbis libogg sqlite3 freetype luajit --triplet x64-windows
+vcpkg install irrlicht zlib curl[winssl] openal-soft libvorbis libogg sqlite3 freetype luajit gmp jsoncpp --triplet x64-windows
 ```
 
 - `curl` is optional, but required to read the serverlist, `curl[winssl]` is required to use the content store.
 - `openal-soft`, `libvorbis` and `libogg` are optional, but required to use sound.
 - `freetype` is optional, it allows true-type font rendering.
 - `luajit` is optional, it replaces the integrated Lua interpreter with a faster just-in-time interpreter.
+- `gmp` and `jsoncpp` are optional, otherwise the bundled versions will be compiled
 
 There are other optional libraries, but they are not tested if they can build and link correctly.
 
@@ -353,7 +354,7 @@ This is outdated and not recommended. Follow the instructions on https://dev.min
 Run the following script in PowerShell:
 
 ```powershell
-cmake . -G"Visual Studio 15 2017 Win64" -DCMAKE_TOOLCHAIN_FILE=D:/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_GETTEXT=0 -DENABLE_CURSES=0
+cmake . -G"Visual Studio 15 2017 Win64" -DCMAKE_TOOLCHAIN_FILE=D:/vcpkg/scripts/buildsystems/vcpkg.cmake -DCMAKE_BUILD_TYPE=Release -DENABLE_GETTEXT=OFF -DENABLE_CURSES=OFF -DENABLE_SYSTEM_JSONCPP=ON
 cmake --build . --config Release
 ```
 Make sure that the right compiler is selected and the path to the vcpkg toolchain is correct.